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Revision | Author | Date | Message | Commit Date |
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3a66d7d | Bart Van Assche | 22 October 2015, 23:02:14 UTC | kref: Remove kref_put_spinlock_irqsave() The last user is gone. Hence remove this function. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Joern Engel <joern@logfs.org> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> | 29 November 2015, 03:33:29 UTC |
9ff9d15 | Bart Van Assche | 22 October 2015, 22:57:04 UTC | target: Invoke release_cmd() callback without holding a spinlock This patch fixes the following kernel warning because it avoids that IRQs are disabled while ft_release_cmd() is invoked (fc_seq_set_resp() invokes spin_unlock_bh()): WARNING: CPU: 3 PID: 117 at kernel/softirq.c:150 __local_bh_enable_ip+0xaa/0x110() Call Trace: [<ffffffff814f71eb>] dump_stack+0x4f/0x7b [<ffffffff8105e56a>] warn_slowpath_common+0x8a/0xc0 [<ffffffff8105e65a>] warn_slowpath_null+0x1a/0x20 [<ffffffff81062b2a>] __local_bh_enable_ip+0xaa/0x110 [<ffffffff814ff229>] _raw_spin_unlock_bh+0x39/0x40 [<ffffffffa03a7f94>] fc_seq_set_resp+0xe4/0x100 [libfc] [<ffffffffa02e604a>] ft_free_cmd+0x4a/0x90 [tcm_fc] [<ffffffffa02e6972>] ft_release_cmd+0x12/0x20 [tcm_fc] [<ffffffffa042bd66>] target_release_cmd_kref+0x56/0x90 [target_core_mod] [<ffffffffa042caf0>] target_put_sess_cmd+0xc0/0x110 [target_core_mod] [<ffffffffa042cb81>] transport_release_cmd+0x41/0x70 [target_core_mod] [<ffffffffa042d975>] transport_generic_free_cmd+0x35/0x420 [target_core_mod] Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Acked-by: Joern Engel <joern@logfs.org> Reviewed-by: Andy Grover <agrover@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Hannes Reinecke <hare@suse.de> Cc: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> | 29 November 2015, 03:33:23 UTC |
057085e | Nicholas Bellinger | 06 November 2015, 07:37:59 UTC | target: Fix race for SCF_COMPARE_AND_WRITE_POST checking This patch addresses a race + use after free where the first stage of COMPARE_AND_WRITE in compare_and_write_callback() is rescheduled after the backend sends the secondary WRITE, resulting in second stage compare_and_write_post() callback completing in target_complete_ok_work() before the first can return. Because current code depends on checking se_cmd->se_cmd_flags after return from se_cmd->transport_complete_callback(), this results in first stage having SCF_COMPARE_AND_WRITE_POST set, which incorrectly falls through into second stage CAW processing code, eventually triggering a NULL pointer dereference due to use after free. To address this bug, pass in a new *post_ret parameter into se_cmd->transport_complete_callback(), and depend upon this value instead of ->se_cmd_flags to determine when to return or fall through into ->queue_status() code for CAW. Cc: Sagi Grimberg <sagig@mellanox.com> Cc: <stable@vger.kernel.org> # v3.12+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> | 29 November 2015, 03:33:15 UTC |
ca82c2b | Nicholas Bellinger | 05 November 2015, 22:11:59 UTC | iscsi-target: Fix rx_login_comp hang after login failure This patch addresses a case where iscsi_target_do_tx_login_io() fails sending the last login response PDU, after the RX/TX threads have already been started. The case centers around iscsi_target_rx_thread() not invoking allow_signal(SIGINT) before the send_sig(SIGINT, ...) occurs from the failure path, resulting in RX thread hanging indefinately on iscsi_conn->rx_login_comp. Note this bug is a regression introduced by: commit e54198657b65625085834847ab6271087323ffea Author: Nicholas Bellinger <nab@linux-iscsi.org> Date: Wed Jul 22 23:14:19 2015 -0700 iscsi-target: Fix iscsit_start_kthreads failure OOPs To address this bug, complete ->rx_login_complete for good measure in the failure path, and immediately return from RX thread context if connection state did not actually reach full feature phase (TARG_CONN_STATE_LOGGED_IN). Cc: Sagi Grimberg <sagig@mellanox.com> Cc: <stable@vger.kernel.org> # v3.10+ Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> | 29 November 2015, 03:33:08 UTC |
82a819e | Luis de Bethencourt | 19 October 2015, 20:18:24 UTC | iscsi-target: return -ENOMEM instead of -1 in case of failed kmalloc() Smatch complains about returning hard coded error codes, silence this warning. drivers/target/iscsi/iscsi_target_parameters.c:211 iscsi_create_default_params() warn: returning -1 instead of -ENOMEM is sloppy Signed-off-by: Luis de Bethencourt <luisbg@osg.samsung.com> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> | 29 November 2015, 03:32:59 UTC |
6ba4bd2 | Andy Grover | 13 November 2015, 18:42:20 UTC | target/user: Do not set unused fields in tcmu_ops TCMU sets TRANSPORT_FLAG_PASSTHROUGH, so INQUIRY commands will not be emulated by LIO but passed up to userspace. Therefore TCMU should not set these, just like pscsi doesn't. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> | 29 November 2015, 03:32:52 UTC |
611e226 | Andy Grover | 13 November 2015, 18:42:19 UTC | target/user: Fix time calc in expired cmd processing Reversed arguments meant that we were doing nothing for cmds whose deadline had passed. Signed-off-by: Andy Grover <agrover@redhat.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> | 29 November 2015, 03:32:33 UTC |
1ec2183 | Linus Torvalds | 23 November 2015, 00:45:59 UTC | Linux 4.4-rc2 | 23 November 2015, 00:45:59 UTC |
104e2a6 | Linus Torvalds | 22 November 2015, 23:21:40 UTC | Merge branch 'akpm' (patches from Andrew) Merge slub bulk allocator updates from Andrew Morton: "This missed the merge window because I was waiting for some repairs to come in. Nothing actually uses the bulk allocator yet and the changes to other code paths are pretty small. And the net guys are waiting for this so they can start merging the client code" More comments from Jesper Dangaard Brouer: "The kmem_cache_alloc_bulk() call, in mm/slub.c, were included in previous kernel. The present version contains a bug. Vladimir Davydov noticed it contained a bug, when kernel is compiled with CONFIG_MEMCG_KMEM (see commit 03ec0ed57ffc: "slub: fix kmem cgroup bug in kmem_cache_alloc_bulk"). Plus the mem cgroup counterpart in kmem_cache_free_bulk() were missing (see commit 033745189b1b "slub: add missing kmem cgroup support to kmem_cache_free_bulk"). I don't consider the fix stable-material because there are no in-tree users of the API. But with known bugs (for memcg) I cannot start using the API in the net-tree" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: slab/slub: adjust kmem_cache_alloc_bulk API slub: add missing kmem cgroup support to kmem_cache_free_bulk slub: fix kmem cgroup bug in kmem_cache_alloc_bulk slub: optimize bulk slowpath free by detached freelist slub: support for bulk free with SLUB freelists | 22 November 2015, 23:21:40 UTC |
dcfeda9 | Linus Torvalds | 22 November 2015, 23:10:57 UTC | Merge tag 'tty-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial fixes from Greg KH: "Here are a few small tty/serial driver fixes for 4.4-rc2 that resolve some reported problems. All have been in linux-next, full details are in the shortlog below" * tag 'tty-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: serial: export fsl8250_handle_irq serial: 8250_mid: Add missing dependency tty: audit: Fix audit source serial: etraxfs-uart: Fix crash serial: fsl_lpuart: Fix earlycon support bcm63xx_uart: Use the device name when registering an interrupt tty: Fix direct use of tty buffer work tty: Fix tty_send_xchar() lock order inversion | 22 November 2015, 23:10:57 UTC |
7f21739 | Linus Torvalds | 22 November 2015, 21:26:24 UTC | Merge tag 'staging-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging Pull staging/IIO fixes from Greg KH: "Here are some staging and iio driver fixes for 4.4-rc2. All of these are in response to issues that have been reported and have been in linux-next for a while" * tag 'staging-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: Revert "Staging: wilc1000: coreconfigurator: Drop unneeded wrapper functions" iio: adc: xilinx: Fix VREFN scale iio: si7020: Swap data byte order iio: adc: vf610_adc: Fix division by zero error iio:ad7793: Fix ad7785 product ID iio: ad5064: Fix ad5629/ad5669 shift iio:ad5064: Make sure ad5064_i2c_write() returns 0 on success iio: lpc32xx_adc: fix warnings caused by enabling unprepared clock staging: iio: select IRQ_WORK for IIO_DUMMY_EVGEN vf610_adc: Fix internal temperature calculation | 22 November 2015, 21:26:24 UTC |
6d2d91b | Linus Torvalds | 22 November 2015, 21:15:05 UTC | Merge tag 'usb-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB fixes from Greg KH: "Here are a number of USB fixes and new device ids for 4.4-rc2. All have been in linux-next and the details are in the shortlog" * tag 'usb-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (28 commits) usblp: do not set TASK_INTERRUPTIBLE before lock USB: MAINTAINERS: cxacru usb: kconfig: fix warning of select USB_OTG USB: option: add XS Stick W100-2 from 4G Systems xhci: Fix a race in usb2 LPM resume, blocking U3 for usb2 devices usb: xhci: fix checking ep busy for CFC xhci: Workaround to get Intel xHCI reset working more reliably usb: chipidea: imx: fix a possible NULL dereference usb: chipidea: usbmisc_imx: fix a possible NULL dereference usb: chipidea: otg: gadget module load and unload support usb: chipidea: debug: disable usb irq while role switch ARM: dts: imx27.dtsi: change the clock information for usb usb: chipidea: imx: refine clock operations to adapt for all platforms usb: gadget: atmel_usba_udc: Expose correct device speed usb: musb: enable usb_dma parameter usb: phy: phy-mxs-usb: fix a possible NULL dereference usb: dwc3: gadget: let us set lower max_speed usb: musb: fix tx fifo flush handling usb: gadget: f_loopback: fix the warning during the enumeration usb: dwc2: host: Fix remote wakeup when not in DWC2_L2 ... | 22 November 2015, 21:15:05 UTC |
0ec7dc8 | Linus Torvalds | 22 November 2015, 20:59:46 UTC | Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus Pull MIPS fixes from Ralf Baechle: - Fix a flood of annoying build warnings - A number of fixes for Atheros 79xx platforms * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: ath79: Add a machine entry for booting OF machines MIPS: ath79: Fix the size of the MISC INTC registers in ar9132.dtsi MIPS: ath79: Fix the DDR control initialization on ar71xx and ar934x MIPS: Fix flood of warnings about comparsion being always true. | 22 November 2015, 20:59:46 UTC |
94521b2 | Linus Torvalds | 22 November 2015, 20:50:58 UTC | Merge branch 'parisc-4.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc update from Helge Deller: "This patchset adds Huge Page and HUGETLBFS support for parisc" Honestly, the hugepage support should have gone through in the merge window, and is not really an rc-time fix. But it only touches arch/parisc, and I cannot find it in myself to care. If one of the three parisc users notices a breakage, I will point at Helge and make rude farting noises. * 'parisc-4.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Map kernel text and data on huge pages parisc: Add Huge Page and HUGETLBFS support parisc: Use long branch to do_syscall_trace_exit parisc: Increase initial kernel mapping to 32MB on 64bit kernel parisc: Initialize the fault vector earlier in the boot process. parisc: Add defines for Huge page support parisc: Drop unused MADV_xxxK_PAGES flags from asm/mman.h parisc: Drop definition of start_thread_som for HP-UX SOM binaries parisc: Fix wrong comment regarding first pmd entry flags | 22 November 2015, 20:50:58 UTC |
727cde6 | Linus Torvalds | 22 November 2015, 20:37:20 UTC | Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf tool fixes from Thomas Gleixner: "A couple of fixes for perf tools: - Build system updates - Plug a memory leak in an error path of perf probe - Tear down probes correctly when adding fails - Fixes to the perf symbol handling - Fix ordering of event processing in buildid-list - Fix per DSO filtering in the histogram browser" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf probe: Clear probe_trace_event when add_probe_trace_event() fails perf probe: Fix memory leaking on failure by clearing all probe_trace_events perf inject: Also re-pipe lost_samples event perf buildid-list: Requires ordered events perf symbols: Fix dso lookup by long name and missing buildids perf symbols: Allow forcing reading of non-root owned files by root perf hists browser: The dso can be obtained from popup_action->ms.map->dso perf hists browser: Fix 'd' hotkey action to filter by DSO perf symbols: Rebuild rbtree when adjusting symbols for kcore tools: Add a "make all" rule tools: Actually install tmon in the install rule | 22 November 2015, 20:37:20 UTC |
069ec22 | Linus Torvalds | 22 November 2015, 20:00:12 UTC | Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "This update contains: - MPX updates for handling 32bit processes - A fix for a long standing bug in 32bit signal frame handling related to FPU/XSAVE state - Handle get_xsave_addr() correctly in KVM - Fix SMAP check under paravirtualization - Add a comment to the static function trace entry to avoid further confusion about the difference to dynamic tracing" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/cpu: Fix SMAP check in PVOPS environments x86/ftrace: Add comment on static function tracing x86/fpu: Fix get_xsave_addr() behavior under virtualization x86/fpu: Fix 32-bit signal frame handling x86/mpx: Fix 32-bit address space calculation x86/mpx: Do proper get_user() when running 32-bit binaries on 64-bit kernels | 22 November 2015, 20:00:12 UTC |
865762a | Jesper Dangaard Brouer | 20 November 2015, 23:57:58 UTC | slab/slub: adjust kmem_cache_alloc_bulk API Adjust kmem_cache_alloc_bulk API before we have any real users. Adjust API to return type 'int' instead of previously type 'bool'. This is done to allow future extension of the bulk alloc API. A future extension could be to allow SLUB to stop at a page boundary, when specified by a flag, and then return the number of objects. The advantage of this approach, would make it easier to make bulk alloc run without local IRQs disabled. With an approach of cmpxchg "stealing" the entire c->freelist or page->freelist. To avoid overshooting we would stop processing at a slab-page boundary. Else we always end up returning some objects at the cost of another cmpxchg. To keep compatible with future users of this API linking against an older kernel when using the new flag, we need to return the number of allocated objects with this API change. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 22 November 2015, 19:58:44 UTC |
0337451 | Jesper Dangaard Brouer | 20 November 2015, 23:57:55 UTC | slub: add missing kmem cgroup support to kmem_cache_free_bulk Initial implementation missed support for kmem cgroup support in kmem_cache_free_bulk() call, add this. If CONFIG_MEMCG_KMEM is not enabled, the compiler should be smart enough to not add any asm code. Incoming bulk free objects can belong to different kmem cgroups, and object free call can happen at a later point outside memcg context. Thus, we need to keep the orig kmem_cache, to correctly verify if a memcg object match against its "root_cache" (s->memcg_params.root_cache). Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 22 November 2015, 19:58:44 UTC |
03ec0ed | Jesper Dangaard Brouer | 20 November 2015, 23:57:52 UTC | slub: fix kmem cgroup bug in kmem_cache_alloc_bulk The call slab_pre_alloc_hook() interacts with kmemgc and is not allowed to be called several times inside the bulk alloc for loop, due to the call to memcg_kmem_get_cache(). This would result in hitting the VM_BUG_ON in __memcg_kmem_get_cache. As suggested by Vladimir Davydov, change slab_post_alloc_hook() to be able to handle an array of objects. A subtle detail is, loop iterator "i" in slab_post_alloc_hook() must have same type (size_t) as size argument. This helps the compiler to easier realize that it can remove the loop, when all debug statements inside loop evaluates to nothing. Note, this is only an issue because the kernel is compiled with GCC option: -fno-strict-overflow In slab_alloc_node() the compiler inlines and optimizes the invocation of slab_post_alloc_hook(s, flags, 1, &object) by removing the loop and access object directly. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reported-by: Vladimir Davydov <vdavydov@virtuozzo.com> Suggested-by: Vladimir Davydov <vdavydov@virtuozzo.com> Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 22 November 2015, 19:58:44 UTC |
d0ecd89 | Jesper Dangaard Brouer | 20 November 2015, 23:57:49 UTC | slub: optimize bulk slowpath free by detached freelist This change focus on improving the speed of object freeing in the "slowpath" of kmem_cache_free_bulk. The calls slab_free (fastpath) and __slab_free (slowpath) have been extended with support for bulk free, which amortize the overhead of the (locked) cmpxchg_double. To use the new bulking feature, we build what I call a detached freelist. The detached freelist takes advantage of three properties: 1) the free function call owns the object that is about to be freed, thus writing into this memory is synchronization-free. 2) many freelist's can co-exist side-by-side in the same slab-page each with a separate head pointer. 3) it is the visibility of the head pointer that needs synchronization. Given these properties, the brilliant part is that the detached freelist can be constructed without any need for synchronization. The freelist is constructed directly in the page objects, without any synchronization needed. The detached freelist is allocated on the stack of the function call kmem_cache_free_bulk. Thus, the freelist head pointer is not visible to other CPUs. All objects in a SLUB freelist must belong to the same slab-page. Thus, constructing the detached freelist is about matching objects that belong to the same slab-page. The bulk free array is scanned is a progressive manor with a limited look-ahead facility. Kmem debug support is handled in call of slab_free(). Notice kmem_cache_free_bulk no longer need to disable IRQs. This only slowed down single free bulk with approx 3 cycles. Performance data: Benchmarked[1] obj size 256 bytes on CPU i7-4790K @ 4.00GHz SLUB fastpath single object quick reuse: 47 cycles(tsc) 11.931 ns To get stable and comparable numbers, the kernel have been booted with "slab_merge" (this also improve performance for larger bulk sizes). Performance data, compared against fallback bulking: bulk - fallback bulk - improvement with this patch 1 - 62 cycles(tsc) 15.662 ns - 49 cycles(tsc) 12.407 ns- improved 21.0% 2 - 55 cycles(tsc) 13.935 ns - 30 cycles(tsc) 7.506 ns - improved 45.5% 3 - 53 cycles(tsc) 13.341 ns - 23 cycles(tsc) 5.865 ns - improved 56.6% 4 - 52 cycles(tsc) 13.081 ns - 20 cycles(tsc) 5.048 ns - improved 61.5% 8 - 50 cycles(tsc) 12.627 ns - 18 cycles(tsc) 4.659 ns - improved 64.0% 16 - 49 cycles(tsc) 12.412 ns - 17 cycles(tsc) 4.495 ns - improved 65.3% 30 - 49 cycles(tsc) 12.484 ns - 18 cycles(tsc) 4.533 ns - improved 63.3% 32 - 50 cycles(tsc) 12.627 ns - 18 cycles(tsc) 4.707 ns - improved 64.0% 34 - 96 cycles(tsc) 24.243 ns - 23 cycles(tsc) 5.976 ns - improved 76.0% 48 - 83 cycles(tsc) 20.818 ns - 21 cycles(tsc) 5.329 ns - improved 74.7% 64 - 74 cycles(tsc) 18.700 ns - 20 cycles(tsc) 5.127 ns - improved 73.0% 128 - 90 cycles(tsc) 22.734 ns - 27 cycles(tsc) 6.833 ns - improved 70.0% 158 - 99 cycles(tsc) 24.776 ns - 30 cycles(tsc) 7.583 ns - improved 69.7% 250 - 104 cycles(tsc) 26.089 ns - 37 cycles(tsc) 9.280 ns - improved 64.4% Performance data, compared current in-kernel bulking: bulk - curr in-kernel - improvement with this patch 1 - 46 cycles(tsc) - 49 cycles(tsc) - improved (cycles:-3) -6.5% 2 - 27 cycles(tsc) - 30 cycles(tsc) - improved (cycles:-3) -11.1% 3 - 21 cycles(tsc) - 23 cycles(tsc) - improved (cycles:-2) -9.5% 4 - 18 cycles(tsc) - 20 cycles(tsc) - improved (cycles:-2) -11.1% 8 - 17 cycles(tsc) - 18 cycles(tsc) - improved (cycles:-1) -5.9% 16 - 18 cycles(tsc) - 17 cycles(tsc) - improved (cycles: 1) 5.6% 30 - 18 cycles(tsc) - 18 cycles(tsc) - improved (cycles: 0) 0.0% 32 - 18 cycles(tsc) - 18 cycles(tsc) - improved (cycles: 0) 0.0% 34 - 78 cycles(tsc) - 23 cycles(tsc) - improved (cycles:55) 70.5% 48 - 60 cycles(tsc) - 21 cycles(tsc) - improved (cycles:39) 65.0% 64 - 49 cycles(tsc) - 20 cycles(tsc) - improved (cycles:29) 59.2% 128 - 69 cycles(tsc) - 27 cycles(tsc) - improved (cycles:42) 60.9% 158 - 79 cycles(tsc) - 30 cycles(tsc) - improved (cycles:49) 62.0% 250 - 86 cycles(tsc) - 37 cycles(tsc) - improved (cycles:49) 57.0% Performance with normal SLUB merging is significantly slower for larger bulking. This is believed to (primarily) be an effect of not having to share the per-CPU data-structures, as tuning per-CPU size can achieve similar performance. bulk - slab_nomerge - normal SLUB merge 1 - 49 cycles(tsc) - 49 cycles(tsc) - merge slower with cycles:0 2 - 30 cycles(tsc) - 30 cycles(tsc) - merge slower with cycles:0 3 - 23 cycles(tsc) - 23 cycles(tsc) - merge slower with cycles:0 4 - 20 cycles(tsc) - 20 cycles(tsc) - merge slower with cycles:0 8 - 18 cycles(tsc) - 18 cycles(tsc) - merge slower with cycles:0 16 - 17 cycles(tsc) - 17 cycles(tsc) - merge slower with cycles:0 30 - 18 cycles(tsc) - 23 cycles(tsc) - merge slower with cycles:5 32 - 18 cycles(tsc) - 22 cycles(tsc) - merge slower with cycles:4 34 - 23 cycles(tsc) - 22 cycles(tsc) - merge slower with cycles:-1 48 - 21 cycles(tsc) - 22 cycles(tsc) - merge slower with cycles:1 64 - 20 cycles(tsc) - 48 cycles(tsc) - merge slower with cycles:28 128 - 27 cycles(tsc) - 57 cycles(tsc) - merge slower with cycles:30 158 - 30 cycles(tsc) - 59 cycles(tsc) - merge slower with cycles:29 250 - 37 cycles(tsc) - 56 cycles(tsc) - merge slower with cycles:19 Joint work with Alexander Duyck. [1] https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/mm/slab_bulk_test01.c [akpm@linux-foundation.org: BUG_ON -> WARN_ON;return] Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Acked-by: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 22 November 2015, 19:58:43 UTC |
8108465 | Jesper Dangaard Brouer | 20 November 2015, 23:57:46 UTC | slub: support for bulk free with SLUB freelists Make it possible to free a freelist with several objects by adjusting API of slab_free() and __slab_free() to have head, tail and an objects counter (cnt). Tail being NULL indicate single object free of head object. This allow compiler inline constant propagation in slab_free() and slab_free_freelist_hook() to avoid adding any overhead in case of single object free. This allows a freelist with several objects (all within the same slab-page) to be free'ed using a single locked cmpxchg_double in __slab_free() and with an unlocked cmpxchg_double in slab_free(). Object debugging on the free path is also extended to handle these freelists. When CONFIG_SLUB_DEBUG is enabled it will also detect if objects don't belong to the same slab-page. These changes are needed for the next patch to bulk free the detached freelists it introduces and constructs. Micro benchmarking showed no performance reduction due to this change, when debugging is turned off (compiled with CONFIG_SLUB_DEBUG). Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Acked-by: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 22 November 2015, 19:58:41 UTC |
41b85a1 | Helge Deller | 21 November 2015, 23:07:44 UTC | parisc: Map kernel text and data on huge pages Adjust the linker script and map_pages() to map kernel text and data on physical 1MB huge/large pages. Signed-off-by: Helge Deller <deller@gmx.de> | 22 November 2015, 11:23:19 UTC |
736d216 | Helge Deller | 21 November 2015, 23:07:06 UTC | parisc: Add Huge Page and HUGETLBFS support This patch adds huge page support to allow userspace to allocate huge pages and to use hugetlbfs filesystem on 32- and 64-bit Linux kernels. A later patch will add kernel support to map kernel text and data on huge pages. The only requirement is, that the kernel needs to be compiled for a PA8X00 CPU (PA2.0 architecture). Older PA1.X CPUs do not support variable page sizes. 64bit Kernels are compiled for PA2.0 by default. Technically on parisc multiple physical huge pages may be needed to emulate standard 2MB huge pages. Signed-off-by: Helge Deller <deller@gmx.de> | 22 November 2015, 11:23:10 UTC |
337685e | Helge Deller | 20 November 2015, 10:22:32 UTC | parisc: Use long branch to do_syscall_trace_exit Use the 22bit instead of the 17bit branch instruction on a 64bit kernel to reach the do_syscall_trace_exit function from the gateway page. A huge page enabled kernel may need the additional branch distance bits. Signed-off-by: Helge Deller <deller@gmx.de> | 22 November 2015, 11:23:02 UTC |
332b42e | Helge Deller | 20 November 2015, 10:17:27 UTC | parisc: Increase initial kernel mapping to 32MB on 64bit kernel For the 64bit kernel the initially 16 MB kernel memory might become too small if you build a kernel with many modules built-in and with kernel text and data areas mapped on huge pages. This patch increases the initial mapping to 32MB for 64bit kernels and keeps 16MB for 32bit kernels. Signed-off-by: Helge Deller <deller@gmx.de> | 22 November 2015, 11:22:53 UTC |
4182d0c | Helge Deller | 20 November 2015, 09:50:01 UTC | parisc: Initialize the fault vector earlier in the boot process. A fault vector on parisc needs to be 2K aligned. Furthermore the checksum of the fault vector needs to sum up to 0 which is being calculated and written at runtime. Up to now we aligned both PA20 and PA11 fault vectors on the same 4K page in order to easily write the checksum after having mapped the kernel read-only (by mapping this page only as read-write). But when we want to map the kernel text and data on huge pages this makes things harder. So, simplify it by aligning both fault vectors on 2K boundries and write the checksum before we map the page read-only. Signed-off-by: Helge Deller <deller@gmx.de> | 22 November 2015, 11:22:43 UTC |
1f25ad2 | Helge Deller | 20 November 2015, 14:46:52 UTC | parisc: Add defines for Huge page support Huge pages on parisc will have the same size as one pmd table, which is on a 64bit kernel 2MB on a kernel with 4K kernel page sizes, and on a 32bit kernel 4MB when used with 4K kernel pages. Since parisc does not physically supports 2MB huge page sizes, emulate it with two consecutive 1MB page sizes instead. Keeping the same huge page size as one pmd will allow us to add transparent huge page support later on. Bit 21 in the pte flags was unused and will now be used to mark a page as huge page (_PAGE_HPAGE_BIT). Signed-off-by: Helge Deller <deller@gmx.de> | 22 November 2015, 11:22:34 UTC |
dcbf0d2 | Helge Deller | 22 November 2015, 11:14:14 UTC | parisc: Drop unused MADV_xxxK_PAGES flags from asm/mman.h Drop the MADV_xxK_PAGES flags, which were never used and were from a proposed API which was never integrated into the generic Linux kernel code. Cc: stable@vger.kernel.org Signed-off-by: Helge Deller <deller@gmx.de> | 22 November 2015, 11:14:14 UTC |
3ad5d7e | Linus Torvalds | 21 November 2015, 18:49:13 UTC | Merge branch 'akpm' (patches from Andrew) Merge misc fixes from Andrew Morton: "A bunch of fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: slub: mark the dangling ifdef #else of CONFIG_SLUB_DEBUG slub: avoid irqoff/on in bulk allocation slub: create new ___slab_alloc function that can be called with irqs disabled mm: fix up sparse warning in gfpflags_allow_blocking ocfs2: fix umask ignored issue PM/OPP: add entry in MAINTAINERS kernel/panic.c: turn off locks debug before releasing console lock kernel/signal.c: unexport sigsuspend() kasan: fix kmemleak false-positive in kasan_module_alloc() fat: fix fake_offset handling on error path mm/hugetlbfs: fix bugs in fallocate hole punch of areas with holes mm/page-writeback.c: initialize m_dirty to avoid compile warning various: fix pci_set_dma_mask return value checking mm: loosen MADV_NOHUGEPAGE to enable Qemu postcopy on s390 mm: vmalloc: don't remove inexistent guard hole in remove_vm_area() tools/vm/page-types.c: support KPF_IDLE ncpfs: don't allow negative timeouts configfs: allow dynamic group creation MAINTAINERS: add Moritz as reviewer for FPGA Manager Framework slab.h: sprinkle __assume_aligned attributes | 21 November 2015, 18:49:13 UTC |
707b4f4 | Linus Torvalds | 21 November 2015, 18:26:24 UTC | Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fixes from Thomas Gleixner: "Two timer fixlets from Arnd: - Use proper constant size in the FSL timer driver - Prevent a build error for legacy platforms" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: clocksource: Disallow drivers for ARCH_USES_GETTIMEOFFSET clocksource/fsl: Avoid harmless 64-bit warnings | 21 November 2015, 18:26:24 UTC |
4143fc8 | Linus Torvalds | 21 November 2015, 18:19:15 UTC | Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq fixes from Thomas Gleixner: "Three fixes for the ARM GIC interrupt controller from Marc addressing various shortcomings versus boot initialization and suspend/resume" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/gic: Add save/restore of the active state irqchip/gic: Clear enable bits before restoring them irqchip/gic: Make sure all interrupts are deactivated at boot | 21 November 2015, 18:19:15 UTC |
876454a | Linus Torvalds | 21 November 2015, 17:52:07 UTC | Merge tag 'for-linus-20151120' of git://git.infradead.org/linux-mtd Pull MTD fixes from Brian Norris: - MAINTAINERS updates for brcmnand driver - Fix reboot hangs seen when multiple NAND flash chips are registered with the same controller - Fix build issues on jz4740 NAND driver; the error was introduced in 4.3, so I guess nobody really cared, but we might as well fix it * tag 'for-linus-20151120' of git://git.infradead.org/linux-mtd: MAINTAINERS: brcmnand: Add co-maintainer for Broadcom SoCs MAINTAINERS: brcmnand: Add Broadcom internal mailing-list mtd: nand: fix shutdown/reboot for multi-chip systems mtd: jz4740_nand: fix build on jz4740 after removing gpio.h | 21 November 2015, 17:52:07 UTC |
bd63acf | Arnd Bergmann | 16 November 2015, 15:48:09 UTC | serial: export fsl8250_handle_irq fsl8250_handle_irq is now used by the of_serial driver, and that fails if it is a loadable module: ERROR: "fsl8250_handle_irq" [drivers/tty/serial/of_serial.ko] undefined! This exports the symbol to avoid randconfig errors. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: d43b54d269d2 ("serial: Enable Freescale 16550 workaround on arm") Cc: Scott Wood <scottwood@freescale.com> Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 21 November 2015, 00:19:54 UTC |
fa70045 | Heikki Krogerus | 12 November 2015, 13:21:23 UTC | serial: 8250_mid: Add missing dependency 8250_mid uses rational_best_approximation() function, so the driver needs to select CONFIG_RATIONAL option. This fixes build error when CONFIG_RATIONAL is not enabled: drivers/built-in.o: In function `mid8250_set_termios': 8250_mid.c:(.text+0x10169a): undefined reference to `rational_best_approximation' Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 21 November 2015, 00:19:54 UTC |
6b2a3d6 | Peter Hurley | 08 November 2015, 13:52:31 UTC | tty: audit: Fix audit source The data to audit/record is in the 'from' buffer (ie., the input read buffer). Fixes: 72586c6061ab ("n_tty: Fix auditing support for cannonical mode") Cc: stable <stable@vger.kernel.org> # 4.1+ Cc: Miloslav Trmač <mitr@redhat.com> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Laura Abbott <labbott@fedoraproject.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 21 November 2015, 00:19:54 UTC |
f356d7a | Guenter Roeck | 02 November 2015, 02:32:56 UTC | serial: etraxfs-uart: Fix crash Since commit 7d8c70d8048c ("serial: mctrl-gpio: rename init function"), crisv32 either do not build or crash as follows. Unable to handle kernel NULL pointer dereference Linux 4.3.0-rc7-next-20151101 #1 Sun Nov 1 11:41:28 PST 2015 ... Call Trace: [<c0004a0e>] show_stack+0x0/0x9e [<c004c0c0>] printk+0x0/0x2c [<c00059d4>] show_registers+0x14a/0x1c2 [<c004c0c0>] printk+0x0/0x2c [<c0004b52>] die_if_kernel+0x7c/0x9e [<c0005346>] do_page_fault+0x32e/0x3e6 [<c01dc59c>] of_get_property+0x0/0x2c [<c01e0558>] of_irq_parse_raw+0x12a/0x376 [<c01dc59c>] of_get_property+0x0/0x2c [<c0053aca>] get_page_from_freelist+0x73e/0x856 [<c01dc59c>] of_get_property+0x0/0x2c [<c0008912>] d_mmu_refill+0x10a/0x112 [<c01b488c>] devm_kmalloc+0x40/0x56 [<c01b47d0>] add_dr+0xc/0x1c [<c01b4800>] devm_add_action+0x2/0x4e [<c01abdbc>] mctrl_gpio_init_noauto+0x1c/0x76 [<c01abf9e>] mctrl_gpio_init+0x22/0x110 The function call in the etraxfs-uart driver was not renamed, possibly due to interference with commit 7b9c5162c182 ("serial: etraxfs-uart: use mctrl_gpio helpers for handling modem signals"). Fixes: 7d8c70d8048c ("serial: mctrl-gpio: rename init function") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Niklas Cassel <nks@flawful.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 21 November 2015, 00:19:54 UTC |
bec8bf6 | Peter Hurley | 20 October 2015, 13:55:21 UTC | serial: fsl_lpuart: Fix earlycon support Earlycon support for Freescale lpuart should only be enabled when console support is enabled. Fixes: 1d59b382f1c4 ("serial: fsl_lpuart: add earlycon support") Acked-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 21 November 2015, 00:19:54 UTC |
83f7fa6 | Simon Arlott | 15 November 2015, 16:14:32 UTC | bcm63xx_uart: Use the device name when registering an interrupt Use the device name when registering an interrupt so that multiple ports don't all have the same interrupt name. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 21 November 2015, 00:19:54 UTC |
17a6921 | Peter Hurley | 08 November 2015, 12:53:06 UTC | tty: Fix direct use of tty buffer work Recent abstraction of tty buffer work introduced api to manage tty input kworker; use it. Fixes: e176058f0de5 ("tty: Abstract tty buffer work") Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 21 November 2015, 00:19:54 UTC |
ee0c1a6 | Peter Hurley | 11 November 2015, 13:03:54 UTC | tty: Fix tty_send_xchar() lock order inversion The correct lock order is atomic_write_lock => termios_rwsem, as established by tty_write() => n_tty_write(). Fixes: c274f6ef1c666 ("tty: Hold termios_rwsem for tcflow(TCIxxx)") Reported-and-Tested-by: Dmitry Vyukov <dvyukov@google.com> Cc: <stable@vger.kernel.org> # v3.18+ Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 21 November 2015, 00:19:54 UTC |
b4a6471 | Jesper Dangaard Brouer | 20 November 2015, 23:57:41 UTC | slub: mark the dangling ifdef #else of CONFIG_SLUB_DEBUG The #ifdef of CONFIG_SLUB_DEBUG is located very far from the associated #else. For readability mark it with a comment. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
8709837 | Christoph Lameter | 20 November 2015, 23:57:38 UTC | slub: avoid irqoff/on in bulk allocation Use the new function that can do allocation while interrupts are disabled. Avoids irq on/off sequences. Signed-off-by: Christoph Lameter <cl@linux.com> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
a380a3c | Christoph Lameter | 20 November 2015, 23:57:35 UTC | slub: create new ___slab_alloc function that can be called with irqs disabled Bulk alloc needs a function like that because it enables interrupts before calling __slab_alloc which promptly disables them again using the expensive local_irq_save(). Signed-off-by: Christoph Lameter <cl@linux.com> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
21fa844 | Jeff Layton | 20 November 2015, 23:57:32 UTC | mm: fix up sparse warning in gfpflags_allow_blocking sparse says: include/linux/gfp.h:274:26: warning: incorrect type in return expression (different base types) include/linux/gfp.h:274:26: expected bool include/linux/gfp.h:274:26: got restricted gfp_t ...add a forced cast to silence the warning. Signed-off-by: Jeff Layton <jeff.layton@primarydata.com> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
8f1eb48 | Junxiao Bi | 20 November 2015, 23:57:30 UTC | ocfs2: fix umask ignored issue New created file's mode is not masked with umask, and this makes umask not work for ocfs2 volume. Fixes: 702e5bc ("ocfs2: use generic posix ACL infrastructure") Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com> Cc: Gang He <ghe@suse.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
875fa6f | Viresh Kumar | 20 November 2015, 23:57:27 UTC | PM/OPP: add entry in MAINTAINERS Add entry for operating performance points into MAINTAINERS file. This will also allow get_maintainers to list OPP stakeholders properly. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Rafael Wysocki <rjw@rjwysocki.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
7625b3a | Vitaly Kuznetsov | 20 November 2015, 23:57:24 UTC | kernel/panic.c: turn off locks debug before releasing console lock Commit 08d78658f393 ("panic: release stale console lock to always get the logbuf printed out") introduced an unwanted bad unlock balance report when panic() is called directly and not from OOPS (e.g. from out_of_memory()). The difference is that in case of OOPS we disable locks debug in oops_enter() and on direct panic call nobody does that. Fixes: 08d78658f393 ("panic: release stale console lock to always get the logbuf printed out") Reported-by: kernel test robot <ying.huang@linux.intel.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Baoquan He <bhe@redhat.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Xie XiuQi <xiexiuqi@huawei.com> Cc: Seth Jennings <sjenning@redhat.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Jan Kara <jack@suse.cz> Cc: Petr Mladek <pmladek@suse.cz> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
9d8a765 | Richard Weinberger | 20 November 2015, 23:57:21 UTC | kernel/signal.c: unexport sigsuspend() sigsuspend() is nowhere used except in signal.c itself, so we can mark it static do not pollute the global namespace. But this patch is more than a boring cleanup patch, it fixes a real issue on UserModeLinux. UML has a special console driver to display ttys using xterm, or other terminal emulators, on the host side. Vegard reported that sometimes UML is unable to spawn a xterm and he's facing the following warning: WARNING: CPU: 0 PID: 908 at include/linux/thread_info.h:128 sigsuspend+0xab/0xc0() It turned out that this warning makes absolutely no sense as the UML xterm code calls sigsuspend() on the host side, at least it tries. But as the kernel itself offers a sigsuspend() symbol the linker choose this one instead of the glibc wrapper. Interestingly this code used to work since ever but always blocked signals on the wrong side. Some recent kernel change made the WARN_ON() trigger and uncovered the bug. It is a wonderful example of how much works by chance on computers. :-) Fixes: 68f3f16d9ad0f1 ("new helper: sigsuspend()") Signed-off-by: Richard Weinberger <richard@nod.at> Reported-by: Vegard Nossum <vegard.nossum@oracle.com> Tested-by: Vegard Nossum <vegard.nossum@oracle.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: <stable@vger.kernel.org> [3.5+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
4593725 | Andrey Ryabinin | 20 November 2015, 23:57:18 UTC | kasan: fix kmemleak false-positive in kasan_module_alloc() Kmemleak reports the following leak: unreferenced object 0xfffffbfff41ea000 (size 20480): comm "modprobe", pid 65199, jiffies 4298875551 (age 542.568s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff82354f5e>] kmemleak_alloc+0x4e/0xc0 [<ffffffff8152e718>] __vmalloc_node_range+0x4b8/0x740 [<ffffffff81574072>] kasan_module_alloc+0x72/0xc0 [<ffffffff810efe68>] module_alloc+0x78/0xb0 [<ffffffff812f6a24>] module_alloc_update_bounds+0x14/0x70 [<ffffffff812f8184>] layout_and_allocate+0x16f4/0x3c90 [<ffffffff812faa1f>] load_module+0x2ff/0x6690 [<ffffffff813010b6>] SyS_finit_module+0x136/0x170 [<ffffffff8239bbc9>] system_call_fastpath+0x16/0x1b [<ffffffffffffffff>] 0xffffffffffffffff kasan_module_alloc() allocates shadow memory for module and frees it on module unloading. It doesn't store the pointer to allocated shadow memory because it could be calculated from the shadowed address, i.e. kasan_mem_to_shadow(addr). Since kmemleak cannot find pointer to allocated shadow, it thinks that memory leaked. Use kmemleak_ignore() to tell kmemleak that this is not a leak and shadow memory doesn't contain any pointers. Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
928a477 | OGAWA Hirofumi | 20 November 2015, 23:57:15 UTC | fat: fix fake_offset handling on error path For the root directory, . and .. are faked (using dir_emit_dots()) and ctx->pos is reset from 2 to 0. A corrupted root directory could cause fat_get_entry() to fail, but ->iterate() (fat_readdir()) reports progress to the VFS (with ctx->pos rewound to 0), so any following calls to ->iterate() continue to return the same entries again and again. The result is that userspace will never see the end of the directory, causing e.g. 'ls' to hang in a getdents() loop. [hirofumi@mail.parknet.co.jp: cleanup and make sure to correct fake_offset] Reported-by: Vegard Nossum <vegard.nossum@oracle.com> Tested-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Richard Weinberger <richard.weinberger@gmail.com> Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
1817889 | Mike Kravetz | 20 November 2015, 23:57:13 UTC | mm/hugetlbfs: fix bugs in fallocate hole punch of areas with holes Hugh Dickins pointed out problems with the new hugetlbfs fallocate hole punch code. These problems are in the routine remove_inode_hugepages and mostly occur in the case where there are holes in the range of pages to be removed. These holes could be the result of a previous hole punch or simply sparse allocation. The current code could access pages outside the specified range. remove_inode_hugepages handles both hole punch and truncate operations. Page index handling was fixed/cleaned up so that the loop index always matches the page being processed. The code now only makes a single pass through the range of pages as it was determined page faults could not race with truncate. A cond_resched() was added after removing up to PAGEVEC_SIZE pages. Some totally unnecessary code in hugetlbfs_fallocate() that remained from early development was also removed. Tested with fallocate tests submitted here: http://librelist.com/browser//libhugetlbfs/2015/6/25/patch-tests-add-tests-for-fallocate-system-call/ And, some ftruncate tests under development Fixes: b5cec28d36f5 ("hugetlbfs: truncate_hugepages() takes a range of pages") Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com> Acked-by: Hugh Dickins <hughd@google.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: "Hillf Danton" <hillf.zj@alibaba-inc.com> Cc: <stable@vger.kernel.org> [4.3] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
50e55bf | Yang Shi | 20 November 2015, 23:57:10 UTC | mm/page-writeback.c: initialize m_dirty to avoid compile warning When building kernel with gcc 5.2, the below warning is raised: mm/page-writeback.c: In function 'balance_dirty_pages.isra.10': mm/page-writeback.c:1545:17: warning: 'm_dirty' may be used uninitialized in this function [-Wmaybe-uninitialized] unsigned long m_dirty, m_thresh, m_bg_thresh; The m_dirty{thresh, bg_thresh} are initialized in the block of "if (mdtc)", so if mdts is null, they won't be initialized before being used. Initialize m_dirty to zero, also initialize m_thresh and m_bg_thresh to keep consistency. They are used later by if condition: !mdtc || m_dirty <= dirty_freerun_ceiling(m_thresh, m_bg_thresh) If mdtc is null, dirty_freerun_ceiling will not be called at all, so the initialization will not change any behavior other than just ceasing the compile warning. (akpm: the patch actually reduces .text size by ~20 bytes on gcc-4.x.y) [akpm@linux-foundation.org: add comment] Signed-off-by: Yang Shi <yang.shi@linaro.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
1a47de6 | Christoph Hellwig | 20 November 2015, 23:57:07 UTC | various: fix pci_set_dma_mask return value checking pci_set_dma_mask returns a negative errno value, not a bool like pci_dma_supported. This of course was just a giant test for attention :) Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Jongman Heo <jongman.heo@samsung.com> Tested-by: Jongman Heo <jongman.heo@samsung.com> [pcnet32] Acked-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Cc: Hans Verkuil <hverkuil@xs4all.nl> Cc: Antti Palosaari <crope@iki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
1a76361 | Jason J. Herne | 20 November 2015, 23:57:04 UTC | mm: loosen MADV_NOHUGEPAGE to enable Qemu postcopy on s390 MADV_NOHUGEPAGE processing is too restrictive. kvm already disables hugepage but hugepage_madvise() takes the error path when we ask to turn on the MADV_NOHUGEPAGE bit and the bit is already on. This causes Qemu's new postcopy migration feature to fail on s390 because its first action is to madvise the guest address space as NOHUGEPAGE. This patch modifies the code so that the operation succeeds without error now. For consistency reasons do the same for MADV_HUGEPAGE. Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com> Reviewed-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
7511c3e | Jerome Marchand | 20 November 2015, 23:57:02 UTC | mm: vmalloc: don't remove inexistent guard hole in remove_vm_area() Commit 71394fe50146 ("mm: vmalloc: add flag preventing guard hole allocation") missed a spot. Currently remove_vm_area() decreases vm->size to "remove" the guard hole page, even when it isn't present. All but one users just free the vm_struct rigth away and never access vm->size anyway. Don't touch the size in remove_vm_area() and have __vunmap() use the proper get_vm_area_size() helper. Signed-off-by: Jerome Marchand <jmarchan@redhat.com> Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
429d486 | Naoya Horiguchi | 20 November 2015, 23:56:59 UTC | tools/vm/page-types.c: support KPF_IDLE PageIdle is exported in include/uapi/linux/kernel-page-flags.h, so let's make page-types.c tool handle it. Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
1491e30 | Dan Carpenter | 20 November 2015, 23:56:56 UTC | ncpfs: don't allow negative timeouts This code causes a static checker warning because it's a user controlled variable where we cap the upper bound but not the lower bound. Let's return an -EINVAL for negative timeouts. [akpm@linux-foundation.org: remove unneeded `else'] Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Jan Kara <jack@suse.com> Cc: Petr Vandrovec <petr@vandrovec.name> Cc: David Howells <dhowells@redhat.com> Cc: Jan Kara <jack@suse.cz> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
5cf6a51 | Daniel Baluta | 20 November 2015, 23:56:53 UTC | configfs: allow dynamic group creation This patchset introduces IIO software triggers, offers a way of configuring them via configfs and adds the IIO hrtimer based interrupt source to be used with software triggers. The architecture is now split in 3 parts, to remove all IIO trigger specific parts from IIO configfs core: (1) IIO configfs - creates the root of the IIO configfs subsys. (2) IIO software triggers - software trigger implementation, dynamically creating /config/iio/triggers group. (3) IIO hrtimer trigger - is the first interrupt source for software triggers (with syfs to follow). Each trigger type can implement its own set of attributes. Lockdep seems to be happy with the locking in configfs patch. This patch (of 5): We don't want to hardcode default groups at subsystem creation time. We export: * configfs_register_group * configfs_unregister_group to allow drivers to programatically create/destroy groups later, after module init time. This is needed for IIO configfs support. (akpm: the other 4 patches to be merged via the IIO tree) Signed-off-by: Daniel Baluta <daniel.baluta@intel.com> Suggested-by: Lars-Peter Clausen <lars@metafoo.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Joel Becker <jlbec@evilplan.org> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Octavian Purdila <octavian.purdila@intel.com> Cc: Paul Bolle <pebolle@tiscali.nl> Cc: Adriana Reus <adriana.reus@intel.com> Cc: Cristina Opriceana <cristina.opriceana@gmail.com> Cc: Peter Meerwald <pmeerw@pmeerw.net> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
dd7d664 | Moritz Fischer | 20 November 2015, 23:56:51 UTC | MAINTAINERS: add Moritz as reviewer for FPGA Manager Framework Nominate myself as Reviewer. Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com> Acked-by: Alan Tull <atull@opensource.altera.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
94a58c3 | Rasmus Villemoes | 20 November 2015, 23:56:48 UTC | slab.h: sprinkle __assume_aligned attributes The various allocators return aligned memory. Telling the compiler that allows it to generate better code in many cases, for example when the return value is immediately passed to memset(). Some code does become larger, but at least we win twice as much as we lose: $ scripts/bloat-o-meter /tmp/vmlinux vmlinux add/remove: 0/0 grow/shrink: 13/52 up/down: 995/-2140 (-1145) An example of the different (and smaller) code can be seen in mm_alloc(). Before: : 48 8d 78 08 lea 0x8(%rax),%rdi : 48 89 c1 mov %rax,%rcx : 48 89 c2 mov %rax,%rdx : 48 c7 00 00 00 00 00 movq $0x0,(%rax) : 48 c7 80 48 03 00 00 movq $0x0,0x348(%rax) : 00 00 00 00 : 31 c0 xor %eax,%eax : 48 83 e7 f8 and $0xfffffffffffffff8,%rdi : 48 29 f9 sub %rdi,%rcx : 81 c1 50 03 00 00 add $0x350,%ecx : c1 e9 03 shr $0x3,%ecx : f3 48 ab rep stos %rax,%es:(%rdi) After: : 48 89 c2 mov %rax,%rdx : b9 6a 00 00 00 mov $0x6a,%ecx : 31 c0 xor %eax,%eax : 48 89 d7 mov %rdx,%rdi : f3 48 ab rep stos %rax,%es:(%rdi) So gcc's strategy is to do two possibly (but not really, of course) unaligned stores to the first and last word, then do an aligned rep stos covering the middle part with a little overlap. Maybe arches which do not allow unaligned stores gain even more. I don't know if gcc can actually make use of alignments greater than 8 for anything, so one could probably drop the __assume_xyz_alignment macros and just use __assume_aligned(8). The increases in code size are mostly caused by gcc deciding to opencode strlen() using the check-four-bytes-at-a-time trick when it knows the buffer is sufficiently aligned (one function grew by 200 bytes). Now it turns out that many of these strlen() calls showing up were in fact redundant, and they're gone from -next. Applying the two patches to next-20151001 bloat-o-meter instead says add/remove: 0/0 grow/shrink: 6/52 up/down: 244/-2140 (-1896) Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | 21 November 2015, 00:17:32 UTC |
81051f9 | Linus Torvalds | 20 November 2015, 23:52:52 UTC | Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c fixes from Wolfram Sang: "A few bugfixes and one PCI ID addition from I2C" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: i801: add Intel Lewisburg device IDs i2c: fix wakeup irq parsing i2c: xiic: Prevent concurrent running of the IRQ handler and __xiic_start_xfer() i2c: Revert "i2c: xiic: Do not reset controller before every transfer" i2c: imx: fix a compiling error | 20 November 2015, 23:52:52 UTC |
116dfe5 | Linus Torvalds | 20 November 2015, 23:47:27 UTC | Merge tag '4.4-fix' of git://git.lwn.net/linux Pull documentation fix from Jon Corbet: "A single fix from Mauro for a 4.4 regression that would cause the docs build to fail on systems with ancient Perl installations" * tag '4.4-fix' of git://git.lwn.net/linux: kernel-doc: Make it compatible with Perl versions below 5.12 again | 20 November 2015, 23:47:27 UTC |
9580306 | Linus Torvalds | 20 November 2015, 23:00:50 UTC | Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm Pull libnvdimm fixes from Dan Williams: - A collection of crash and deadlock fixes for DAX that are also tagged for -stable. We will look to re-enable DAX pmd mappings in 4.5, but for now 4.4 and -stable should disable it by default. - A fixup to ext2 and ext4 to mirror the same warning emitted by XFS when mounting with "-o dax" * 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: block: protect rw_page against device teardown mm, dax: fix DAX deadlocks (COW fault) dax: disable pmd mappings ext2, ext4: warn when mounting with dax enabled | 20 November 2015, 23:00:50 UTC |
400f3f2 | Linus Torvalds | 20 November 2015, 17:01:07 UTC | Merge tag 'pm+acpi-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more power management and ACPI updates from Rafael Wysocki: "These are mostly fixes and cleanups (ACPI core, PM core, cpufreq, ACPI EC driver, device properties) including three reverts of recent intel_pstate driver commits due to a regression introduced by one of them plus support for Atom Airmont cores in intel_pstate (which really boils down to adding new frequency tables for Airmont) and additional turbostat updates. Specifics: - Revert three recent intel_pstate driver commits one of which introduced a regression and the remaining two depend on the problematic one (Rafael Wysocki). - Fix breakage related to the recently introduced ACPI _CCA object support in the PCI DMA setup code (Suravee Suthikulpanit). - Fix up the recently introduced ACPI CPPC support to only use the hardware-reduced version of the PCCT structure as the only architecture to support it (ARM64) will only use hardware-reduced ACPI anyway (Ashwin Chaugule). - Fix a cpufreq mediatek driver build problem (Arnd Bergmann). - Fix the SMBus transaction handling implementation in the ACPI core to avoid re-entrant calls to wait_event_timeout() which makes intermittent boot stalls related to the Smart Battery Subsystem initialization go away and revert a workaround of another problem with the same underlying root cause (Chris Bainbridge). - Fix the generic wakeup interrupts framework to avoid using invalid IRQ numbers (Dmitry Torokhov). - Remove a redundant check from the ACPI EC driver (Markus Elfring). - Modify the intel_pstate driver so it can support more Atom flavors than just one (Baytrail) and add support for Atom Airmont cores (which require new freqnency tables) to it (Philippe Longepe). - Clean up MSR-related symbols in turbostat (Len Brown)" * tag 'pm+acpi-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PCI: Fix OF logic in pci_dma_configure() Revert "Documentation: kernel_parameters for Intel P state driver" cpufreq: mediatek: fix build error cpufreq: intel_pstate: Add separate support for Airmont cores cpufreq: intel_pstate: Replace BYT with ATOM Revert "cpufreq: intel_pstate: Use ACPI perf configuration" Revert "cpufreq: intel_pstate: Avoid calculation for max/min" ACPI-EC: Drop unnecessary check made before calling acpi_ec_delete_query() Revert "ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook" ACPI / SMBus: Fix boot stalls / high CPU caused by reentrant code PM / wakeirq: check that wake IRQ is valid before accepting it ACPI / CPPC: Use h/w reduced version of the PCCT structure x86: remove unused definition of MSR_NHM_PLATFORM_INFO tools/power turbostat: use new name for MSR_PLATFORM_INFO | 20 November 2015, 17:01:07 UTC |
2f25535 | Linus Torvalds | 20 November 2015, 16:20:04 UTC | Merge tag 'powerpc-4.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixlet from Michael Ellerman: "Wire up sys_mlock2()" * tag 'powerpc-4.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc: Wire up sys_mlock2() | 20 November 2015, 16:20:04 UTC |
cdc5a31 | Alexandra Yates | 05 November 2015, 19:40:25 UTC | i2c: i801: add Intel Lewisburg device IDs Adding Intel codename Lewisburg platform device IDs for SMBus. Signed-off-by: Alexandra Yates <alexandra.yates@linux.intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> | 20 November 2015, 15:22:21 UTC |
c18fba2 | Grygorii Strashko | 12 November 2015, 13:42:26 UTC | i2c: fix wakeup irq parsing This patch fixes obvious copy-past error in wake up irq parsing code which leads to the fact that dev_pm_set_wake_irq() will be called with wrong IRQ number when "wakeup" IRQ is not defined in DT. Fixes: 3fffd1283927 ("i2c: allow specifying separate wakeup interrupt in device tree") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: <stable@vger.kernel.org> # v4.3 | 20 November 2015, 15:19:08 UTC |
d0fe525 | Lars-Peter Clausen | 16 November 2015, 13:42:04 UTC | i2c: xiic: Prevent concurrent running of the IRQ handler and __xiic_start_xfer() Prior to commit e6c9a037bc8a ("i2c: xiic: Remove the disabling of interrupts") IRQs where disabled when the initial __xiic_start_xfer() was called. After the commit the interrupt is enabled while the function is running, this means it is possible for the interrupt to be triggered while the function is still running. When this happens the internal data structures get corrupted and undefined behavior can occur like the following crash: Internal error: Oops: 17 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 2040 Comm: i2cdetect Not tainted 4.0.0-02856-g047a308 #10956 Hardware name: Xilinx Zynq Platform task: ee0c9500 ti: e99a2000 task.ti: e99a2000 PC is at __xiic_start_xfer+0x6c4/0x7c8 LR is at __xiic_start_xfer+0x690/0x7c8 pc : [<c02bbffc>] lr : [<c02bbfc8>] psr: 800f0013 sp : e99a3da8 ip : 00000000 fp : 00000000 r10: 00000001 r9 : 600f0013 r8 : f0180000 r7 : f0180000 r6 : c064e444 r5 : 00000017 r4 : ee031010 r3 : 00000000 r2 : 00000000 r1 : 600f0013 r0 : 0000000f Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 18c5387d Table: 29a5404a DAC: 00000015 Process i2cdetect (pid: 2040, stack limit = 0xe99a2210) Stack: (0xe99a3da8 to 0xe99a4000) 3da0: ee031010 00000000 00000001 ee031020 ee031224 c02bc5ec 3dc0: ee34c604 00000000 ee0c9500 e99a3dcc e99a3dd0 e99a3dd0 e99a3dd8 c069f0e8 3de0: 00000000 ee031020 c064e100 ffff90bb e99a3e48 c02b6590 ee031020 00000001 3e00: e99a3e48 ee031020 00000000 e99a3e63 00000001 c02b6ec4 00000000 00000000 3e20: 00000000 c02b7320 e99a3ef0 00000000 00000000 e99e3df0 00000000 00000000 3e40: 00000103 2814575f 0000003e c00a0000 e99a3e85 0001003e ee0c0000 e99a3e63 3e60: eefd3578 c064e61c ee0c9500 c0041e04 0000056c e9a56db8 00006e5a b6f5c000 3e80: ee0c9548 eefd0040 00000001 eefd3540 ee0c9500 eefd39a0 c064b540 ee0c9500 3ea0: 00000000 ee92b000 00000000 bef4862c ee34c600 e99ecdc0 00000720 00000003 3ec0: e99a2000 00000000 00000000 c02b8b30 00000000 00000000 00000000 e99a3f24 3ee0: b6e80000 00000000 00000000 c04257e8 00000000 e99a3f24 c02b8f08 00000703 3f00: 00000003 c02116bc ee935300 00000000 bef4862c ee34c600 e99ecdc0 c02b91f0 3f20: e99ecdc0 00000720 bef4862c eeb725f8 e99ecdc0 c00c9e2c 00000003 00000003 3f40: ee248dc0 00000000 ee248dc8 00000002 eeb7c1a8 00000000 00000000 c00bb360 3f60: 00000000 00000000 00000003 ee248dc0 bef4862c e99ecdc0 e99ecdc0 00000720 3f80: 00000003 e99a2000 00000000 c00c9f68 00000000 00000000 b6f22000 00000036 3fa0: c000dfa4 c000de20 00000000 00000000 00000003 00000720 bef4862c bef4862c 3fc0: 00000000 00000000 b6f22000 00000036 00000000 00000000 b6f60000 00000000 3fe0: 00013040 bef48614 00008cab b6ecdbe6 400f0030 00000003 2f7fd821 2f7fdc21 [<c02bbffc>] (__xiic_start_xfer) from [<c02bc5ec>] (xiic_xfer+0x94/0x168) [<c02bc5ec>] (xiic_xfer) from [<c02b6590>] (__i2c_transfer+0x4c/0x7c) [<c02b6590>] (__i2c_transfer) from [<c02b6ec4>] (i2c_transfer+0x9c/0xc4) [<c02b6ec4>] (i2c_transfer) from [<c02b7320>] (i2c_smbus_xfer+0x3a0/0x4ec) [<c02b7320>] (i2c_smbus_xfer) from [<c02b8b30>] (i2cdev_ioctl_smbus+0xb0/0x214) [<c02b8b30>] (i2cdev_ioctl_smbus) from [<c02b91f0>] (i2cdev_ioctl+0xa0/0x1d4) [<c02b91f0>] (i2cdev_ioctl) from [<c00c9e2c>] (do_vfs_ioctl+0x4b0/0x5b8) [<c00c9e2c>] (do_vfs_ioctl) from [<c00c9f68>] (SyS_ioctl+0x34/0x5c) [<c00c9f68>] (SyS_ioctl) from [<c000de20>] (ret_fast_syscall+0x0/0x34) Code: e283300c e5843210 eafffe64 e5943210 (e1d320b4) The issue can easily be reproduced by performing I2C access under high system load or IO load. To fix the issue protect the invocation to __xiic_start_xfer() form xiic_start_xfer() with the same lock that is used to protect the interrupt handler. Fixes: e6c9a037bc8a ("i2c: xiic: Remove the disabling of interrupts") Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Reviewed-by: Shubhrajyoti Datta <shubhraj@xilinx.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> | 20 November 2015, 15:15:35 UTC |
9656eee | Lars-Peter Clausen | 16 November 2015, 13:42:03 UTC | i2c: Revert "i2c: xiic: Do not reset controller before every transfer" Commit d701667bb331 ("i2c: xiic: Do not reset controller before every transfer") removed the reinitialization of the controller before the start of each transfer. Apparently this change is not safe to make and the commit results in random I2C bus failures. An easy way to trigger the issue is to run i2cdetect. Without the patch applied: 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- UU UU -- UU 3c -- -- UU 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: -- -- -- -- -- -- -- -- With the patch applied every other or so invocation: 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10: 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20: 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30: -- -- -- -- -- -- -- -- UU UU -- UU 3c -- -- UU 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: -- -- -- -- -- -- -- -- So revert the commit for now. Fixes: d701667bb331 ("i2c: xiic: Do not reset controller before every transfer") Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Shubhrajyoti Datta <shubhraj@xilinx.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> | 20 November 2015, 15:04:59 UTC |
8bb6fd5 | Hou Zhiqiang | 17 November 2015, 09:53:18 UTC | i2c: imx: fix a compiling error drivers/i2c/busses/i2c-imx.c:978:2: error: implicit declaration of function ‘pinctrl_select_state’ [-Werror=implicit-function-declaration] pinctrl_select_state(i2c_imx->pinctrl, i2c_imx->pinctrl_pins_gpio); ^ Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@freescale.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> | 20 November 2015, 14:58:22 UTC |
55f1d59 | Alban Bedel | 17 November 2015, 20:52:00 UTC | MIPS: ath79: Add a machine entry for booting OF machines As I'm using a board with a broken old bootloader I hardcoded the mips_machtype and did't notice that the machine entry was still missing. [ralf@linux-mips.org: Fixed spelling message noticed by Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>.] Signed-off-by: Alban Bedel <albeu@free.fr> Cc: Qais Yousef <qais.yousef@imgtec.com> Cc: Felix Fietkau <nbd@openwrt.org> Cc: Andrew Bresticker <abrestic@chromium.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/11503/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> | 20 November 2015, 14:44:57 UTC |
accbfb5 | Alban Bedel | 17 November 2015, 19:34:51 UTC | MIPS: ath79: Fix the size of the MISC INTC registers in ar9132.dtsi There is 2 registers that is 8 bytes long, not 4. Signed-off-by: Alban Bedel <albeu@free.fr> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Alexander Couzens <lynxis@fe80.eu> Cc: Joel Porquet <joel@porquet.org> Cc: Andrew Bresticker <abrestic@chromium.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/11508/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> | 20 November 2015, 11:14:27 UTC |
5011a7e | Alban Bedel | 17 November 2015, 08:40:07 UTC | MIPS: ath79: Fix the DDR control initialization on ar71xx and ar934x The DDR control initialization needs to know the SoC type, however ath79_detect_sys_type() was called after ath79_ddr_ctrl_init(). Reverse the order to fix the DDR control initialization on ar71xx and ar934x. Signed-off-by: Alban Bedel <albeu@free.fr> Cc: Felix Fietkau <nbd@openwrt.org> Cc: Qais Yousef <qais.yousef@imgtec.com> Cc: Andrew Bresticker <abrestic@chromium.org> CC: stable@vger.kernel.org # v4.2+ Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/11500/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> | 20 November 2015, 11:10:09 UTC |
1e208ae | Helge Deller | 20 November 2015, 09:12:42 UTC | parisc: Drop definition of start_thread_som for HP-UX SOM binaries The definition of start_thread_som was planned to be used to execute HP-UX SOM binaries. Since HP-UX compatibility was dropped with kernel 4.0 there is no need to carry it further. Signed-off-by: Helge Deller <deller@gmx.de> | 20 November 2015, 09:19:19 UTC |
2b3f344 | Helge Deller | 20 November 2015, 09:09:18 UTC | parisc: Fix wrong comment regarding first pmd entry flags The first pmd entry is marked with PxD_FLAG_ATTACHED instead of _PAGE_GATEWAY. Signed-off-by: Helge Deller <deller@gmx.de> | 20 November 2015, 09:19:18 UTC |
86eaf54 | Linus Torvalds | 20 November 2015, 04:51:31 UTC | Merge tag 'dmaengine-fix-4.4-rc2' of git://git.infradead.org/users/vkoul/slave-dma Pull dmaengine fixes from Vinod Koul: "This has odd fixes spreadout drivers, not major here - usbdmac fixes for pm - edma build and logic fixes - build warn fixes for few drivers" * tag 'dmaengine-fix-4.4-rc2' of git://git.infradead.org/users/vkoul/slave-dma: dmaengine: at_hdmac: use %pad format string for dma_addr_t dmaengine: at_xdmac: use %pad format string for dma_addr_t dmaengine: imx-sdma: remove __init annotation on sdma_event_remap dmaengine: edma: predecence bug in GET_NUM_QDMACH() dmaengine: edma: fix build without CONFIG_OF dmaengine: of_dma: Correct return code for of_dma_request_slave_channel in case !CONFIG_OF dmaengine: sh: usb-dmac: Fix pm_runtime_{enable,disable}() imbalance dmaengine: sh: usb-dmac: Fix crash on runtime suspend | 20 November 2015, 04:51:31 UTC |
c69bde7 | Linus Torvalds | 20 November 2015, 04:39:38 UTC | Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux Pull drm fixes from Dave Airlie: "A varied bunch of fixes, the radeon pull is probably a bit larger than I'd like, but it contains 2 weeks of stuff, and the Fiji fixes are a bit large, but they are Fiji specific. Otherwise: - mgag200: One cursor regression oops fix. - vc4: A few small fixes and cleanups. - core: Atomic fixes and Atomic helper fixes - i915: Revert for the backlight regression along with a bunch of fixes" * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (58 commits) drm/atomic-helper: Check encoder/crtc constraints Revert "drm/i915: skip modeset if compatible for everyone." drm/mgag200: fix kernel hang in cursor code. drm/amdgpu: reserve/unreserve objects out of map/unmap operations drm/amdgpu: move bo_reserve out of amdgpu_vm_clear_bo drm/amdgpu: add lock for interval tree in vm drm/amdgpu: keep the owner for VMIDs drm/amdgpu: move VM manager clean into the VM code again drm/amdgpu: cleanup VM coding style drm/amdgpu: remove unused VM manager field drm/amdgpu: cleanup scheduler command submission drm/amdgpu: fix typo in firmware name drm/i915: Consider SPLL as another shared pll, v2. drm/i915: Fix gpu frequency change tracing drm/vc4: Make sure that planes aren't scaled. drm/vc4: Fix some failure to track __iomem decorations on pointers. drm/vc4: checking for NULL instead of IS_ERR drm/vc4: fix itnull.cocci warnings drm/vc4: fix platform_no_drv_owner.cocci warnings drm/vc4: vc4_plane_duplicate_state() can be static ... | 20 November 2015, 04:39:38 UTC |
cd6caf5 | Linus Torvalds | 20 November 2015, 02:14:47 UTC | Merge tag 'for-linus-4.4' of git://git.code.sf.net/p/openipmi/linux-ipmi Pull IPMI updates from Corey Minyard: "Some fixes for small IPMI problems. The most significant is that the driver wasn't starting the timer for some messages, which would result in problems if that message failed for some reason. The others are small optimizations or making things a little neater" * tag 'for-linus-4.4' of git://git.code.sf.net/p/openipmi/linux-ipmi: ipmi watchdog : add panic_wdt_timeout parameter char: ipmi: Move MODULE_DEVICE_TABLE() to follow struct ipmi: Stop the timer immediately if idle ipmi: Start the timer and thread on internal msgs | 20 November 2015, 02:14:47 UTC |
8bdddfa | Linus Torvalds | 20 November 2015, 01:58:44 UTC | Merge tag 'renesas-sh-drivers-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas Pull SH driver fixlet from Simon Horman: "I am sending this change after v4.4-rc1 has been released as it depends on SoC changes which are present in that rc: = Remove now unnecessary reference to CONFIG_ARCH_SHMOBILE_MULTI" * tag 'renesas-sh-drivers-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas: drivers: sh: Get rid of CONFIG_ARCH_SHMOBILE_MULTI | 20 November 2015, 01:58:44 UTC |
19cd80a | Jiri Slaby | 02 November 2015, 09:27:00 UTC | usblp: do not set TASK_INTERRUPTIBLE before lock It is not permitted to set task state before lock. usblp_wwait sets the state to TASK_INTERRUPTIBLE and calls mutex_lock_interruptible. Upon return from that function, the state will be TASK_RUNNING again. This is clearly a bug and a warning is generated with LOCKDEP too: WARNING: CPU: 1 PID: 5109 at kernel/sched/core.c:7404 __might_sleep+0x7d/0x90() do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffffa0c588d0>] usblp_wwait+0xa0/0x310 [usblp] Modules linked in: ... CPU: 1 PID: 5109 Comm: captmon Tainted: G W 4.2.5-0.gef2823b-default #1 Hardware name: LENOVO 23252SG/23252SG, BIOS G2ET33WW (1.13 ) 07/24/2012 ffffffff81a4edce ffff880236ec7ba8 ffffffff81716651 0000000000000000 ffff880236ec7bf8 ffff880236ec7be8 ffffffff8106e146 0000000000000282 ffffffff81a50119 000000000000028b 0000000000000000 ffff8802dab7c508 Call Trace: ... [<ffffffff8106e1c6>] warn_slowpath_fmt+0x46/0x50 [<ffffffff8109a8bd>] __might_sleep+0x7d/0x90 [<ffffffff8171b20f>] mutex_lock_interruptible_nested+0x2f/0x4b0 [<ffffffffa0c588fc>] usblp_wwait+0xcc/0x310 [usblp] [<ffffffffa0c58bb2>] usblp_write+0x72/0x350 [usblp] [<ffffffff8121ed98>] __vfs_write+0x28/0xf0 ... Commit 7f477358e2384c54b190cc3b6ce28277050a041b (usblp: Implement the ENOSPC convention) moved the set prior locking. So move it back after the lock. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Fixes: 7f477358e2 ("usblp: Implement the ENOSPC convention") Acked-By: Pete Zaitcev <zaitcev@yahoo.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 20 November 2015, 00:31:42 UTC |
44243ef | Simon Arlott | 15 November 2015, 17:12:08 UTC | USB: MAINTAINERS: cxacru Make cxacru an orphan. I still have a few of these devices for testing but haven't had an ADSL1 connection for several years. Signed-off-by: Simon Arlott <simon@fire.lp0.eu> Cc: Duncan Sands <baldrick@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 20 November 2015, 00:31:42 UTC |
c4f1613 | Peter Chen | 19 November 2015, 03:47:47 UTC | usb: kconfig: fix warning of select USB_OTG When choose randconfig for kernel build, it reports below warning: "warning: (USB_OTG_FSM && FSL_USB2_OTG && USB_MV_OTG) selects USB_OTG which has unmet direct dependencies (USB_SUPPORT && USB && PM)" In fact, USB_OTG is visible symbol and depends on PM, so the driver needs to depend on it to reduce dependency problem. Signed-off-by: Peter Chen <peter.chen@freescale.com> Reported-by: Arnd Bergmann <arnd@arndb.de> Cc: Felipe Balbi <balbi@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 20 November 2015, 00:31:42 UTC |
638148e | Bjørn Mork | 18 November 2015, 20:12:33 UTC | USB: option: add XS Stick W100-2 from 4G Systems Thomas reports " 4gsystems sells two total different LTE-surfsticks under the same name. .. The newer version of XS Stick W100 is from "omega" .. Under windows the driver switches to the same ID, and uses MI03\6 for network and MI01\6 for modem. .. echo "1c9e 9b01" > /sys/bus/usb/drivers/qmi_wwan/new_id echo "1c9e 9b01" > /sys/bus/usb-serial/drivers/option1/new_id T: Bus=01 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#= 4 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=1c9e ProdID=9b01 Rev=02.32 S: Manufacturer=USB Modem S: Product=USB Modem S: SerialNumber= C: #Ifs= 5 Cfg#= 1 Atr=80 MxPwr=500mA I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I: If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I: If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option I: If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan I: If#= 4 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage Now all important things are there: wwp0s29f7u2i3 (net), ttyUSB2 (at), cdc-wdm0 (qmi), ttyUSB1 (at) There is also ttyUSB0, but it is not usable, at least not for at. The device works well with qmi and ModemManager-NetworkManager. " Reported-by: Thomas Schäfer <tschaefer@t-online.de> Cc: <stable@vger.kernel.org> Signed-off-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 20 November 2015, 00:31:42 UTC |
a3767e3 | Rafael J. Wysocki | 20 November 2015, 00:22:52 UTC | Merge branches 'acpi-smbus', 'acpi-ec' and 'acpi-pci' * acpi-smbus: Revert "ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook" ACPI / SMBus: Fix boot stalls / high CPU caused by reentrant code * acpi-ec: ACPI-EC: Drop unnecessary check made before calling acpi_ec_delete_query() * acpi-pci: PCI: Fix OF logic in pci_dma_configure() | 20 November 2015, 00:22:52 UTC |
0aba0ab | Rafael J. Wysocki | 20 November 2015, 00:22:33 UTC | Merge branch 'pm-sleep' * pm-sleep: PM / wakeirq: check that wake IRQ is valid before accepting it | 20 November 2015, 00:22:33 UTC |
9832bf3 | Rafael J. Wysocki | 20 November 2015, 00:22:10 UTC | Merge branches 'pm-cpufreq' and 'acpi-cppc' * pm-cpufreq: Revert "Documentation: kernel_parameters for Intel P state driver" cpufreq: mediatek: fix build error cpufreq: intel_pstate: Add separate support for Airmont cores cpufreq: intel_pstate: Replace BYT with ATOM Revert "cpufreq: intel_pstate: Use ACPI perf configuration" Revert "cpufreq: intel_pstate: Avoid calculation for max/min" * acpi-cppc: ACPI / CPPC: Use h/w reduced version of the PCCT structure | 20 November 2015, 00:22:10 UTC |
768acd6 | Suravee Suthikulpanit | 19 November 2015, 00:49:52 UTC | PCI: Fix OF logic in pci_dma_configure() This patch fixes a bug introduced by previous commit, which incorrectly checkes the of_node of the end-point device. Instead, it should check the of_node of the host bridge. Fixes: 50230713b639 ("PCI: OF: Move of_pci_dma_configure() to pci_dma_configure()") Reported-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 20 November 2015, 00:20:36 UTC |
2d591ab | Dave Airlie | 19 November 2015, 23:45:31 UTC | Merge tag 'drm-intel-fixes-2015-11-19' of git://anongit.freedesktop.org/drm-intel into drm-fixes i915 fixes for 4.4, including the revert for the backlight regression Olof reported. Otherwise fixes all around. * tag 'drm-intel-fixes-2015-11-19' of git://anongit.freedesktop.org/drm-intel: Revert "drm/i915: skip modeset if compatible for everyone." drm/i915: Consider SPLL as another shared pll, v2. drm/i915: Fix gpu frequency change tracing drm/i915: Don't clobber the addfb2 ioctl params drm/i915: Clear intel_crtc->atomic before updating it. drm/i915: get runtime PM reference around GEM set_caching IOCTL drm/i915: Fix GT frequency rounding drm/i915: quirk backlight present on Macbook 4, 1 drm/i915: Fix crtc_y assignment in intel_find_initial_plane_obj() | 19 November 2015, 23:45:31 UTC |
db39563 | Dave Airlie | 19 November 2015, 23:44:50 UTC | Merge tag 'topic/drm-fixes-2015-11-19' of git://anongit.freedesktop.org/drm-intel into drm-fixes Here are some drm core fixes for v4.4 that I've picked up. Atomic fixes from Maarten, and atomic helper fixes from Ville and Daniel. Admittedly the topmost commit didn't sit in our tree for very long, but does come with reviews and testing from trustworthy people. * tag 'topic/drm-fixes-2015-11-19' of git://anongit.freedesktop.org/drm-intel: drm/atomic-helper: Check encoder/crtc constraints drm: Fix primary plane size for stereo doubled modes for legacy setcrtc drm/core: Fix old_fb handling in pan_display_atomic. drm/core: Fix old_fb handling in restore_fbdev_mode_atomic. drm/atomic: add a drm_atomic_clean_old_fb helper. drm/core: Fix old_fb handling in drm_mode_atomic_ioctl. drm/core: Set legacy_cursor_update in drm_atomic_helper_disable_plane. | 19 November 2015, 23:44:50 UTC |
0a72f2a | Greg Kroah-Hartman | 19 November 2015, 22:08:37 UTC | Merge tag 'usb-serial-4.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial into usb-linus Johan writes: USB-serial fixes for v4.4-rc2 Here are some new device ids, support for an odd qcserial Gobi interface layout and a fix for the qcserial Huawei interface layout. Signed-off-by: Johan Hovold <johan@kernel.org> | 19 November 2015, 22:08:37 UTC |
2e6edc9 | Dan Williams | 19 November 2015, 21:29:28 UTC | block: protect rw_page against device teardown Fix use after free crashes like the following: general protection fault: 0000 [#1] SMP Call Trace: [<ffffffffa0050216>] ? pmem_do_bvec.isra.12+0xa6/0xf0 [nd_pmem] [<ffffffffa0050ba2>] pmem_rw_page+0x42/0x80 [nd_pmem] [<ffffffff8128fd90>] bdev_read_page+0x50/0x60 [<ffffffff812972f0>] do_mpage_readpage+0x510/0x770 [<ffffffff8128fd20>] ? I_BDEV+0x20/0x20 [<ffffffff811d86dc>] ? lru_cache_add+0x1c/0x50 [<ffffffff81297657>] mpage_readpages+0x107/0x170 [<ffffffff8128fd20>] ? I_BDEV+0x20/0x20 [<ffffffff8128fd20>] ? I_BDEV+0x20/0x20 [<ffffffff8129058d>] blkdev_readpages+0x1d/0x20 [<ffffffff811d615f>] __do_page_cache_readahead+0x28f/0x310 [<ffffffff811d6039>] ? __do_page_cache_readahead+0x169/0x310 [<ffffffff811c5abd>] ? pagecache_get_page+0x2d/0x1d0 [<ffffffff811c76f6>] filemap_fault+0x396/0x530 [<ffffffff811f816e>] __do_fault+0x4e/0xf0 [<ffffffff811fce7d>] handle_mm_fault+0x11bd/0x1b50 Cc: <stable@vger.kernel.org> Cc: Jens Axboe <axboe@fb.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Reported-by: kbuild test robot <lkp@intel.com> Acked-by: Matthew Wilcox <willy@linux.intel.com> [willy: symmetry fixups] Signed-off-by: Dan Williams <dan.j.williams@intel.com> | 19 November 2015, 21:47:10 UTC |
b4ba1f0 | Linus Torvalds | 19 November 2015, 20:21:23 UTC | Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fixes from Catalin Marinas: - Fix size alignment in __iommu_{alloc,free}_attrs - Kernel memory mapping fix with CONFIG_DEBUG_RODATA for page sizes other than 4KB and a fix of the mark_rodata_ro permissions - dma_get_ops() simplification and behaviour alignment between DT and ACPI - function_graph trace fix for cpu_suspend() (CPUs returning from deep sleep via a different path and confusing the tracer) - Use of non-global mappings for UEFI run-time services to avoid a (potentially theoretical) TLB conflict - Crypto priority reduction of core AES cipher (the accelerated asynchronous implementation is preferred when available) - Reverting an old commit that removed BogoMIPS from /proc/cpuinfo on arm64. Apparently, we had it for a relatively short time and libvirt started checking for its presence - Compiler warnings fixed (ptrace.h inclusion from compat.h, smp_load_acquire with const argument) * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: restore bogomips information in /proc/cpuinfo arm64: barriers: fix smp_load_acquire to work with const arguments arm64: Fix R/O permissions in mark_rodata_ro arm64: crypto: reduce priority of core AES cipher arm64: use non-global mappings for UEFI runtime regions arm64: kernel: pause/unpause function graph tracer in cpu_suspend() arm64: do not include ptrace.h from compat.h arm64: simplify dma_get_ops arm64: mm: use correct mapping granularity under DEBUG_RODATA arm64/dma-mapping: Fix sizes in __iommu_{alloc,free}_attrs | 19 November 2015, 20:21:23 UTC |
a3d66b5 | Linus Torvalds | 19 November 2015, 20:16:12 UTC | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching Pull livepatching fix from Jiri Kosina: "A fix for module handling in case kASLR has been enabled, from Zhou Chengming" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching: livepatch: x86: fix relocation computation with kASLR | 19 November 2015, 20:16:12 UTC |
319645c | Linus Torvalds | 19 November 2015, 20:10:51 UTC | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid Pull HID fixes from Jiri Kosina: "Two functional fixes for wacom HID driver from Ping Cheng and Jiri Kosina" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: wacom: fixup quirks setup for WACOM_DEVICETYPE_PAD HID: wacom: Add outbounding area for DTU1141 | 19 November 2015, 20:10:51 UTC |
1282ac4 | Linus Torvalds | 19 November 2015, 19:33:58 UTC | Merge tag 'mmc-v4.4-rc1' of git://git.linaro.org/people/ulf.hansson/mmc Pull MMC fixes from Ulf Hansson: "Here are some mmc fixes intended for v4.4 rc2. It's based on a commit prior rc1 as I wanted to get them a bit more tested in next before sending you the pull request. MMC core: - Improve reliability when selecting HS200 mode - Improve reliability when selecting HS400 mode - mmc: remove bondage between REQ_META and reliable write MMC host: - pxamci: Fix read-only gpio detection polarity - mtk-sd: Preinitialize delay_phase to fix the case when delay is zero - android-goldfish: Fix build dependency by adding HAS_DMA - dw_mmc: Remove Seungwon Jeon from MAINTAINERS" * tag 'mmc-v4.4-rc1' of git://git.linaro.org/people/ulf.hansson/mmc: mmc: remove bondage between REQ_META and reliable write mmc: MMC_GOLDFISH should depend on HAS_DMA mmc: mediatek: Preinitialize delay_phase in get_best_delay() MAINTAINERS: mmc: Remove Seungwon Jeon from dw_mmc mmc: mmc: Improve reliability of mmc_select_hs400() mmc: mmc: Move mmc_switch_status() mmc: mmc: Fix HS setting in mmc_select_hs400() mmc: mmc: Improve reliability of mmc_select_hs200() mmc: pxamci: fix read-only gpio detection polarity | 19 November 2015, 19:33:58 UTC |
92e788b | Yang Shi | 18 November 2015, 18:48:55 UTC | arm64: restore bogomips information in /proc/cpuinfo As previously reported, some userspace applications depend on bogomips showed by /proc/cpuinfo. Although there is much less legacy impact on aarch64 than arm, it does break libvirt. This patch reverts commit 326b16db9f69 ("arm64: delay: don't bother reporting bogomips in /proc/cpuinfo"), but with some tweak due to context change and without the pr_info(). Fixes: 326b16db9f69 ("arm64: delay: don't bother reporting bogomips in /proc/cpuinfo") Signed-off-by: Yang Shi <yang.shi@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Cc: <stable@vger.kernel.org> # 3.12+ Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> | 19 November 2015, 17:57:18 UTC |
5481c8f | Daniel Vetter | 18 November 2015, 17:46:48 UTC | drm/atomic-helper: Check encoder/crtc constraints This was totally lost when I originally created the atomic helpers. We probably should also check possible_clones in the helpers, but since the legacy ones didn't do that this is for a separate patch. Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Daniel Stone <daniels@collabora.com> Reviewed-by: Daniel Stone <daniels@collabora.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1447868808-10266-1-git-send-email-daniel.vetter@ffwll.ch | 19 November 2015, 15:11:13 UTC |
581b7f1 | Andrew Cooper | 03 June 2015, 09:31:14 UTC | x86/cpu: Fix SMAP check in PVOPS environments There appears to be no formal statement of what pv_irq_ops.save_fl() is supposed to return precisely. Native returns the full flags, while lguest and Xen only return the Interrupt Flag, and both have comments by the implementations stating that only the Interrupt Flag is looked at. This may have been true when initially implemented, but no longer is. To make matters worse, the Xen PVOP leaves the upper bits undefined, making the BUG_ON() undefined behaviour. Experimentally, this now trips for 32bit PV guests on Broadwell hardware. The BUG_ON() is consistent for an individual build, but not consistent for all builds. It has also been a sitting timebomb since SMAP support was introduced. Use native_save_fl() instead, which will obtain an accurate view of the AC flag. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> Tested-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: <lguest@lists.ozlabs.org> Cc: Xen-devel <xen-devel@lists.xen.org> CC: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1433323874-6927-1-git-send-email-andrew.cooper3@citrix.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> | 19 November 2015, 10:07:49 UTC |
112677d | Namhyung Kim | 17 November 2015, 00:43:24 UTC | x86/ftrace: Add comment on static function tracing There was a confusion between update_ftrace_function() and static function tracing trampoline regarding 3rd parameter (ftrace_ops). Add a comment for clarification. Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: H. Peter Anvin <hpa@linux.intel.com> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1447721004-2551-1-git-send-email-namhyung@kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de> | 19 November 2015, 10:07:49 UTC |
7383123 | Jani Nikula | 19 November 2015, 08:26:30 UTC | Revert "drm/i915: skip modeset if compatible for everyone." This reverts commit 6764e9f8724f1231b4deac53b9a82286ac0830e7 Author: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Date: Thu Aug 27 15:44:06 2015 +0200 drm/i915: skip modeset if compatible for everyone. Bring back the i915.fastboot module parameter, disabled by default, due to backlight regression on Chromebook Pixel 2015. Apparently the firmware of the Chromebook in question enables the panel but disables backlight to avoid a brief garbage scanout upon loading the kernel/module. With fastboot, we leave the backlight untouched, in this case disabled. The user would have to do a modeset (i.e. not just crank up the brightness) to enable the backlight. There is no clean fix readily available, so get back to the drawing board by reverting. [N.B. The reference below is for when the thread was included on public lists, and some of the context had already been dropped by then.] Reported-and-tested-by: Olof Johansson <olof@lixom.net> Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> References: http://marc.info/?i=CAKMK7uES7xk05ki92oeX6gmvZWAh9f2vL7yz=6T+fGK9J3X7cQ@mail.gmail.com Fixes: 6764e9f8724f ("drm/i915: skip modeset if compatible for everyone.") Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1447921590-3785-1-git-send-email-jani.nikula@intel.com | 19 November 2015, 08:38:09 UTC |