Skip to main content
https://github.com/torvalds/linux
18 March 2025, 07:35:20 UTC
sort by:
RevisionAuthorDateMessageCommit Date
1bae4ce Linus Torvalds22 January 2011, 03:01:34 UTCLinux 2.6.38-rc222 January 2011, 03:01:34 UTC
13a3cec Linus Torvalds22 January 2011, 00:50:31 UTCMerge branch 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 * 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (101 commits) [media] staging/lirc: fix mem leaks and ptr err usage [media] hdpvr: reduce latency of i2c read/write w/recycled buffer [media] hdpvr: enable IR part [media] rc/mceusb: timeout should be in ns, not us [media] v4l2-device: fix 'use-after-freed' oops [media] v4l2-dev: don't memset video_device.dev [media] zoran: use video_device_alloc instead of kmalloc [media] w9966: zero device state after a detach [media] v4l: Fix a use-before-set in the control framework [media] v4l: Include linux/videodev2.h in media/v4l2-ctrls.h [media] DocBook/v4l: update V4L2 revision and update copyright years [media] DocBook/v4l: fix validation error in dev-rds.xml [media] v4l2-ctrls: queryctrl shouldn't attempt to replace V4L2_CID_PRIVATE_BASE IDs [media] v4l2-ctrls: fix missing 'read-only' check [media] pvrusb2: Provide more information about IR units to lirc_zilog and ir-kbd-i2c [media] ir-kbd-i2c: Add back defaults setting for Zilog Z8's at addr 0x71 [media] lirc_zilog: Update TODO.lirc_zilog [media] lirc_zilog: Add Andy Walls to copyright notice and authors list [media] lirc_zilog: Remove useless struct i2c_driver.command function [media] lirc_zilog: Remove unneeded tests for existence of the IR Tx function ...22 January 2011, 00:50:31 UTC
973c9f4 David Howells20 January 2011, 16:38:33 UTCKEYS: Fix up comments in key management code Fix up comments in the key management code. No functional changes. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 22:59:30 UTC
a8b17ed David Howells20 January 2011, 16:38:27 UTCKEYS: Do some style cleanup in the key management code. Do a bit of a style clean up in the key management code. No functional changes. Done using: perl -p -i -e 's!^/[*]*/\n!!' security/keys/*.c perl -p -i -e 's!} /[*] end [a-z0-9_]*[(][)] [*]/\n!}\n!' security/keys/*.c sed -i -s -e ": next" -e N -e 's/^\n[}]$/}/' -e t -e P -e 's/^.*\n//' -e "b next" security/keys/*.c To remove /*****/ lines, remove comments on the closing brace of a function to name the function and remove blank lines before the closing brace of a function. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 22:59:29 UTC
9093ba5 Linus Torvalds21 January 2011, 21:44:07 UTCMerge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6 * git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: cifs: fix up CIFSSMBEcho for unaligned access cifs: fix unaligned accesses in cifsConvertToUCS cifs: clean up unaligned accesses in cifs_unicode.c cifs: fix unaligned access in check2ndT2 and coalesce_t2 cifs: clean up unaligned accesses in validate_t2 cifs: use get/put_unaligned functions to access ByteCount cifs: move time field in cifsInodeInfo cifs: TCP_Server_Info diet CIFS: Implement cifs_strict_readv (try #4) CIFS: Implement cifs_file_strict_mmap (try #2) CIFS: Implement cifs_strict_fsync CIFS: Make cifsFileInfo_put work with strict cache mode21 January 2011, 21:44:07 UTC
ebe0d80 Linus Torvalds21 January 2011, 21:43:21 UTCMerge branch 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu * 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: x86,percpu: Move out of place 64 bit ops into X86_64 section21 January 2011, 21:43:21 UTC
5bf7a65 Linus Torvalds21 January 2011, 21:38:57 UTCMerge branch 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq * 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: note the nested NOT_RUNNING test in worker_clr_flags() isn't a noop workqueue: relax lockdep annotation on flush_work()21 January 2011, 21:38:57 UTC
0f5c2ac Linus Torvalds21 January 2011, 21:38:26 UTCMerge branch 'irq-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'irq-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (37 commits) um: Use generic irq Kconfig tile: Use generic irq Kconfig sparc: Use generic irq Kconfig score: Use generic irq Kconfig powerpc: Use generic irq Kconfig parisc: Use generic irq Kconfig mn10300: Use generic irq Kconfig microblaze: Use generic irq Kconfig m68knommu: Use generic irq Kconfig ia64: Use generic irq Kconfig frv: Use generic irq Kconfig blackfin: Use generic irq Kconfig alpha: Use generic irq Kconfig genirq: Remove __do_IRQ m32r: Convert to generic irq Kconfig m32r: Convert usrv platform irq handling m32r: Convert opsput_lcdpld irq chip m32r: Convert opsput lanpld irq chip m32r: Convert opsput pld irq chip m32r: Convert opsput irq chip ...21 January 2011, 21:38:26 UTC
cfd7448 Linus Torvalds21 January 2011, 21:35:10 UTCMerge branch 'stable/bug-fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/bug-fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: p2m: correctly initialize partial p2m leaf xen: fix non-ANSI function warning in irq.c21 January 2011, 21:35:10 UTC
a1d3f5b Linus Torvalds21 January 2011, 21:34:39 UTCMerge branches 'fixes' and 'fwnet' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: core: fix unstable I/O with Canon camcorder * 'fwnet' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: net: is not experimental anymore firewire: net: invalidate ARP entries of removed nodes21 January 2011, 21:34:39 UTC
7971b96 Linus Torvalds21 January 2011, 21:24:33 UTCMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: ALSA: hda - Fix EAPD to low on CZC P10T tablet computer with ALC662 ALSA: HDA: Add SKU ignore for another Thinkpad Edge 14 ALSA: hda - Fix "unused variable" compile warning ALSA: hda - Add quirk for HP Z-series workstation Revert "ALSA: HDA: Create mixers on ALC887" ASoC: PXA: Fix codec address on Zipit Z2 ASoC: PXA: Fix jack detection on Zipit Z2 ASoC: Blackfin: fix DAI/SPORT config dependency issues ASoC: Blackfin TDM: use external frame syncs ASoC: Blackfin AC97: fix build error after multi-component update ASoC: Blackfin TDM: fix missed snd_soc_dai_get_drvdata update ASoC: documentation updates ALSA: ice1712 delta - initialize SPI clock21 January 2011, 21:24:33 UTC
c745552 Linus Torvalds21 January 2011, 21:24:16 UTCMerge branch 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6 * 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6: powerpc/83xx: fix build failures on dt compatible list.21 January 2011, 21:24:16 UTC
d41ad6d Linus Torvalds21 January 2011, 21:23:52 UTCMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (34 commits) powerpc/mpic: Fix mask/unmask timeout message powerpc/pseries: Add BNX2=m to defconfig powerpc: Enable 64kB pages and 1024 threads in pseries config powerpc: Disable mcount tracers in pseries defconfig powerpc/boot/dts: Install dts from the right directory powerpc: machine_check_generic is wrong on 64bit powerpc: Check RTAS extended log flag before checking length powerpc: Fix corruption when grabbing FWNMI data powerpc: Rework pseries machine check handler powerpc: Don't silently handle machine checks from userspace powerpc: Remove duplicate debugger hook in machine_check_exception powerpc: Never halt RTAS error logging after receiving an unrecoverable machine check powerpc: Don't force MSR_RI in machine_check_exception powerpc: Print 32 bits of DSISR in show_regs powerpc/kdump: Disable ftrace during kexec powerpc/kdump: Move crash_kexec_stop_spus to kdump crash handler powerpc/kexec: Remove empty ppc_md.machine_kexec_prepare powerpc/kexec: Don't initialise kexec hooks to default handlers powerpc/kdump: Remove ppc_md.machine_crash_shutdown powerpc/kexec: Remove ppc_md.machine_kexec ...21 January 2011, 21:23:52 UTC
3dece37 Michal Simek21 January 2011, 07:49:56 UTCmm: System without MMU do not need pte_mkwrite The patch "thp: export maybe_mkwrite" (commit 14fd403f2146) breaks systems without MMU. Error log: CC arch/microblaze/mm/init.o In file included from include/linux/mman.h:14, from arch/microblaze/mm/consistent.c:24: include/linux/mm.h: In function 'maybe_mkwrite': include/linux/mm.h:482: error: implicit declaration of function 'pte_mkwrite' include/linux/mm.h:482: error: incompatible types in assignment Signed-off-by: Michal Simek <monstr@monstr.eu> CC: Andrea Arcangeli <aarcange@redhat.com> Reviewed-by: Rik van Riel <riel@redhat.com> CC: Andrew Morton <akpm@linux-foundation.org> CC: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 16:40:30 UTC
db9fd84 Roland Dreier21 January 2011, 00:23:08 UTCMAINTAINERS: Update Roland Dreier's email address The cisco.com address will stop working soon, and besides no one can remember the second "d" in "rolandd" or how to spell "rdreier." Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 16:40:30 UTC
8e1b4cf Stefan Bader20 January 2011, 14:38:23 UTCxen: p2m: correctly initialize partial p2m leaf After changing the p2m mapping to a tree by commit 58e05027b530ff081ecea68e38de8d59db8f87e0 xen: convert p2m to a 3 level tree and trying to boot a DomU with 615MB of memory, the following crash was observed in the dump: kernel direct mapping tables up to 26f00000 @ 1ec4000-1fff000 BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<c0107397>] xen_set_pte+0x27/0x60 *pdpt = 0000000000000000 *pde = 0000000000000000 Adding further debug statements showed that when trying to set up pfn=0x26700 the returned mapping was invalid. pfn=0x266ff calling set_pte(0xc1fe77f8, 0x6b3003) pfn=0x26700 calling set_pte(0xc1fe7800, 0x3) Although the last_pfn obtained from the startup info is 0x26700, which should in turn not be hit, the additional 8MB which are added as extra memory normally seem to be ok. This lead to looking into the initial p2m tree construction, which uses the smaller value and assuming that there is other code handling the extra memory. When the p2m tree is set up, the leaves are directly pointed to the array which the domain builder set up. But if the mapping is not on a boundary that fits into one p2m page, this will result in the last leaf being only partially valid. And as the invalid entries are not initialized in that case, things go badly wrong. I am trying to fix that by checking whether the current leaf is a complete map and if not, allocate a completely new page and copy only the valid pointers there. This may not be the most efficient or elegant solution, but at least it seems to allow me booting DomUs with memory assignments all over the range. BugLink: http://bugs.launchpad.net/bugs/686692 [v2: Redid a bit of commit wording and fixed a compile warning] Signed-off-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>21 January 2011, 16:24:14 UTC
4843456 Linus Torvalds21 January 2011, 15:33:37 UTCMerge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: quota: Fix deadlock during path resolution21 January 2011, 15:33:37 UTC
dfff95c Thomas Gleixner19 January 2011, 19:46:24 UTCum: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jeff Dike <jdike@addtoit.com>21 January 2011, 10:55:35 UTC
8df2740 Thomas Gleixner19 January 2011, 19:44:43 UTCtile: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Chris Metcalf <cmetcalf@tilera.com>21 January 2011, 10:55:34 UTC
373b25c Thomas Gleixner19 January 2011, 19:43:56 UTCsparc: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: "David S. Miller" <davem@davemloft.net>21 January 2011, 10:55:34 UTC
2fc361b Thomas Gleixner19 January 2011, 19:41:19 UTCscore: Use generic irq Kconfig No functional change Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Chen Liqin <liqin.chen@sunplusct.com>21 January 2011, 10:55:34 UTC
2604362 Thomas Gleixner19 January 2011, 19:39:39 UTCpowerpc: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 10:55:33 UTC
72e73af Thomas Gleixner19 January 2011, 19:38:30 UTCparisc: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Kyle McMartin <kyle@mcmartin.ca> Acked-by: James Bottomley <James.Bottomley@HansenPartnership.com>21 January 2011, 10:55:33 UTC
b169c90 Thomas Gleixner19 January 2011, 19:36:02 UTCmn10300: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: David Howells <dhowells@redhat.com>21 January 2011, 10:55:33 UTC
b6e3162 Thomas Gleixner19 January 2011, 19:35:05 UTCmicroblaze: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Michal Simek <monstr@monstr.eu>21 January 2011, 10:55:32 UTC
d8b1932 Thomas Gleixner19 January 2011, 19:34:21 UTCm68knommu: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Greg Ungerer <gerg@uclinux.org>21 January 2011, 10:55:32 UTC
c5e6612 Thomas Gleixner19 January 2011, 19:32:46 UTCia64: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Tony Luck <tony.luck@intel.com>21 January 2011, 10:55:32 UTC
f39b02d Thomas Gleixner19 January 2011, 19:32:04 UTCfrv: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: David Howells <dhowells@redhat.com>21 January 2011, 10:55:32 UTC
7b02886 Thomas Gleixner19 January 2011, 19:29:58 UTCblackfin: Use generic irq Kconfig No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mike Frysinger <vapier@gentoo.org>21 January 2011, 10:55:31 UTC
e27ec64 Thomas Gleixner19 January 2011, 19:27:11 UTCalpha: Use generic irq Kconfig Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Richard Henderson <rth@twiddle.net>21 January 2011, 10:55:31 UTC
1c77ff2 Thomas Gleixner19 January 2011, 18:41:35 UTCgenirq: Remove __do_IRQ All architectures are finally converted. Remove the cruft. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Richard Henderson <rth@twiddle.net> Cc: Mike Frysinger <vapier@gentoo.org> Cc: David Howells <dhowells@redhat.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Greg Ungerer <gerg@uclinux.org> Cc: Michal Simek <monstr@monstr.eu> Acked-by: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Jeff Dike <jdike@addtoit.com>21 January 2011, 10:55:31 UTC
0e155b2 Thomas Gleixner19 January 2011, 18:17:10 UTCm32r: Convert to generic irq Kconfig Use the generic irq Kconfig. Select GENERIC_HARDIRQS_NO_DEPRECATED as we have converted all irq_chip functions. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:30 UTC
7a0abc7 Thomas Gleixner19 January 2011, 18:10:18 UTCm32r: Convert usrv platform irq handling Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:30 UTC
9b141fa Thomas Gleixner19 January 2011, 18:01:23 UTCm32r: Convert opsput_lcdpld irq chip Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:30 UTC
1899a49 Thomas Gleixner19 January 2011, 17:58:45 UTCm32r: Convert opsput lanpld irq chip Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:29 UTC
22cbc93 Thomas Gleixner19 January 2011, 17:55:09 UTCm32r: Convert opsput pld irq chip Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:29 UTC
883c0cc Thomas Gleixner19 January 2011, 17:48:15 UTCm32r: Convert opsput irq chip Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:29 UTC
ce1104c Thomas Gleixner19 January 2011, 17:44:10 UTCm32r: Convert oaks32r irq chips Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:28 UTC
b82727e Thomas Gleixner19 January 2011, 17:39:27 UTCm32r: Convert mappi3 irq chip Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:28 UTC
efa63c6 Thomas Gleixner19 January 2011, 17:34:51 UTCm32r: Convert mappi2 irq chip Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:28 UTC
1f12681 Thomas Gleixner19 January 2011, 17:27:59 UTCm32r: Convert mappi irq chips Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:27 UTC
37808e4 Thomas Gleixner19 January 2011, 17:19:42 UTCm32r: Convert m32700ut lcdpld irq chip Convert the irq chip to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:27 UTC
72bd198 Thomas Gleixner19 January 2011, 17:14:21 UTCm32r: Convert m32700ut lanpld irq chip Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:27 UTC
63b549b Thomas Gleixner19 January 2011, 16:41:51 UTCm32r: Convert m32700ut pld irq chip Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:27 UTC
364a9ba Thomas Gleixner11 January 2011, 09:43:49 UTCm32r: Convert m32104ut irq chip Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:26 UTC
8afb53b Thomas Gleixner19 January 2011, 16:02:29 UTCm32r: Convert m32104ut irq handling Convert the irq chips to the new functions and use proper flow handlers. handle_level_irq is appropriate. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:26 UTC
863018a Thomas Gleixner22 September 2010, 17:13:16 UTCm32r: Cleanup direct irq_desc access The irq descriptors are already initialized by the generic code. Remove the redundant init code and set the irq chip with the proper accessor function. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:26 UTC
3013978 Thomas Gleixner19 January 2011, 13:20:13 UTCcris: Use generic irq Kconfig Use the generic irq Kconfig. Select GENERIC_HARDIRQS_NO_DEPRECATED as we have converted all irq_chip functions. Fix the fallout in show_interrupts(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mikael Starvik <starvik@axis.com>21 January 2011, 10:55:25 UTC
9af7503 Thomas Gleixner19 January 2011, 13:05:30 UTCcris: Convert V32 interrupt handling Convert the irq chip functions and install handle_simple_irq for each interrupt to get rid of __do_IRQ() Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mikael Starvik <starvik@axis.com>21 January 2011, 10:55:25 UTC
f7a004b Thomas Gleixner19 January 2011, 12:54:54 UTCcris: Convert V10 interrupt handling Convert the irq_chip functions and install handle_simple_irq for each interrupt. This converts V10 to the flow handling and lets us remove __do_IRQ(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mikael Starvik <starvik@axis.com>21 January 2011, 10:55:25 UTC
c84077a Thomas Gleixner19 January 2011, 12:59:01 UTCcris: Use irq handling wrapper Use the wrapper around __do_IRQ() so we can convert V10 and V32 seperately. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mikael Starvik <starvik@axis.com>21 January 2011, 10:55:24 UTC
51f3f15 Thomas Gleixner19 January 2011, 11:26:32 UTCh8300: Use generic irq Kconfig Switch to the generic irq Kconfig. h8300 has all irq chips converted to the new functions, so select the GENERIC_HARDIRQS_NO_DEPRECATED switch as well. Fixup the resulting fallout in show_interrupts(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:24 UTC
f9f91ef Thomas Gleixner19 January 2011, 11:18:57 UTCh8300: Convert interrupt handling to flow handler __do_IRQ is deprecated so h8300 needs to be converted to proper flow handling. The irq chip is simple and does not required any mask/ack/eoi functions, so we can use handle_simple_irq. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:24 UTC
12174aa Thomas Gleixner19 January 2011, 11:15:29 UTCh8300: Convert to new irq_chip functions No functional change, just straight forward conversion. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Paul Mundt <lethal@linux-sh.org>21 January 2011, 10:55:23 UTC
842a209 Takashi Iwai21 January 2011, 07:10:14 UTCMerge branch 'fix/asoc' into for-linus21 January 2011, 07:10:14 UTC
2f36f5e Takashi Iwai21 January 2011, 07:10:09 UTCMerge branch 'fix/misc' into for-linus21 January 2011, 07:10:09 UTC
8bfc5e3 Scott Wood17 January 2011, 12:10:41 UTCpowerpc/mpic: Fix mask/unmask timeout message Don't say that enable timed out when it was disable, and show which IRQ had the problem. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:39 UTC
cb046de Nishanth Aravamudan13 January 2011, 13:22:39 UTCpowerpc/pseries: Add BNX2=m to defconfig Upcoming servers will include a Broadcom NIC, add to the defconfig to increase testing coverage and make sure mainline builds come up with networking. Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:39 UTC
ef4f7c2 Anton Blanchard12 January 2011, 02:14:32 UTCpowerpc: Enable 64kB pages and 1024 threads in pseries config - Enable 64kB pages so it gets some regular testing. - The largest POWER7 has 1024 threads so bump NR_CPUS it to match. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:39 UTC
7d2dcd0 Anton Blanchard12 January 2011, 02:12:43 UTCpowerpc: Disable mcount tracers in pseries defconfig IRQSOFF_TRACER and STACK_TRACER force the kernel to be built with -pg which is a substantial overhead. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:39 UTC
4d9ef89 Ben Hutchings08 January 2011, 14:24:01 UTCpowerpc/boot/dts: Install dts from the right directory The dts-installed variable is initialised using a wildcard path that will be expanded relative to the build directory. Use the existing variable dtstree to generate an absolute wildcard path that will work when building in a separate directory. Reported-by: Gerhard Pircher <gerhard_pircher@gmx.net> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Tested-by: Gerhard Pircher <gerhard_pircher@gmx.net> [against 2.6.32] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:38 UTC
fbe754c Anton Blanchard11 January 2011, 19:52:31 UTCpowerpc: machine_check_generic is wrong on 64bit Decoding machine checks is CPU specific and so machine_check_generic doesn't do the right thing on 64bit chips. Luckily we never call into this code because we call ppc_md.machine_check_exception instead if available. Since we check cur_cpu_spec->machine_check before calling it, we may as well remove machine_check_generic from 64bit archs. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:38 UTC
7f32c9c Anton Blanchard11 January 2011, 19:51:31 UTCpowerpc: Check RTAS extended log flag before checking length The spec suggests we should first check the extended log flag before checking the length field. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:38 UTC
d368514 Anton Blanchard11 January 2011, 19:50:51 UTCpowerpc: Fix corruption when grabbing FWNMI data The FWNMI code uses a global buffer without any locks to read the RTAS error information. If two CPUs take a machine check at once then we will corrupt this buffer. Since most FWNMI rtas messages are not of the extended type, we can create a 64bit percpu buffer and use it where possible. If we do receive an extended RTAS log then we fall back to the old behaviour of using the global buffer. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:38 UTC
d47d1d8 Anton Blanchard11 January 2011, 19:49:19 UTCpowerpc: Rework pseries machine check handler Rework pseries machine check handler: - If MSR_RI isn't set, we cannot recover even if the machine check was fully recovered - Rename nonfatal to recovered - Handle RTAS_DISP_LIMITED_RECOVERY - Use BUS_MCEERR_AR instead of BUS_ADRERR - Don't check all the RTAS error log fields when receiving a synchronous machine check. Recent versions of the pseries firmware do not fill them in during a machine check and instead send a follow up error log with the detailed information. If we see a synchronous machine check, and we came from userspace then kill the task. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:38 UTC
e49b1fa Anton Blanchard11 January 2011, 19:48:14 UTCpowerpc: Don't silently handle machine checks from userspace If a machine check comes from userspace we send a SIGBUS to the task and fail to printk anything. If we are taking machine checks due to bad hardware we want to know about it right away. Furthermore if we don't complain loudly then it will look a lot like a bug in the userspace application, potentially causing a lot of confusion. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:37 UTC
dfb5509 Anton Blanchard11 January 2011, 19:47:20 UTCpowerpc: Remove duplicate debugger hook in machine_check_exception We are calling debugger_fault_handler twice in machine_check_exception. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:37 UTC
3f9793e Anton Blanchard11 January 2011, 19:46:29 UTCpowerpc: Never halt RTAS error logging after receiving an unrecoverable machine check Newer versions of the System p firwmare send a partial RTAS error log in the machine check handler with a more detailed response appearing sometime later via check event. This means at machine check time we do not have enough information to ascertain exactly what went on. Furthermore, I have found the RTAS error logs in the machine check handler contain no useful information, so halting on them makes little sense. If we want to halt it would make more sense to do it following the error log received sometime later via check event. In light of this, never halt the error log in the pseries machine check handler. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:37 UTC
a443506 Anton Blanchard11 January 2011, 19:45:31 UTCpowerpc: Don't force MSR_RI in machine_check_exception We should never force MSR_RI on. If we take a machine check with MSR_RI off then we have no chance of recovering safely. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:37 UTC
7071854 Anton Blanchard11 January 2011, 19:44:30 UTCpowerpc: Print 32 bits of DSISR in show_regs We were printing 64 bits of DSISR in show_regs even though it is 32 bit. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:37 UTC
ac4414e Anton Blanchard06 January 2011, 18:00:36 UTCpowerpc/kdump: Disable ftrace during kexec We should disable ftrace during kexec, some of the tracers are very invasive and we do not want them going off while doing the low level work of swapping one kernel out for another. This mirrors what we do on x86. Even though we cannot return from a kexec on powerpc (since we do not implement CONFIG_KEXEC_JUMP), add the restore code in case we do one day. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:36 UTC
158d5b5 Anton Blanchard21 January 2011, 02:43:59 UTCpowerpc/kdump: Move crash_kexec_stop_spus to kdump crash handler Use the crash handler hooks to run the SPU stop code, just like we do for ehea and cell RAS code. While I'm here I noticed "CPUSs reliabally" so fix the spelling MISTAKESs reliabally. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:36 UTC
c6baabf Anton Blanchard06 January 2011, 17:58:36 UTCpowerpc/kexec: Remove empty ppc_md.machine_kexec_prepare We check for a valid handler before calling ppc_md.machine_kexec_prepare so we can just remove these empty handlers. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:36 UTC
2bb44d6 Anton Blanchard06 January 2011, 17:57:03 UTCpowerpc/kexec: Don't initialise kexec hooks to default handlers There's no need to initialise ppc_md.machine_kexec and ppc_md.machine_kexec_prepare to the default handlers. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:35 UTC
c1f784e Anton Blanchard06 January 2011, 17:56:09 UTCpowerpc/kdump: Remove ppc_md.machine_crash_shutdown No one uses ppc_md.machine_crash_shutdown, so remove it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:35 UTC
c948687 Anton Blanchard06 January 2011, 17:55:36 UTCpowerpc/kexec: Remove ppc_md.machine_kexec No one uses ppc_md.machine_kexec, so remove it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:35 UTC
619b267 Anton Blanchard06 January 2011, 17:54:58 UTCpowerpc/kexec: Remove ppc_md.machine_kexec_cleanup No one uses ppc_md.machine_kexec_cleanup, so remove it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:35 UTC
50266a1 Anton Blanchard06 January 2011, 17:54:15 UTCpowerpc/kexec: Move all ppc_md kexec function pointers together Move all the kexec handlers together. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:34 UTC
b18ae08 Tejun Heo03 January 2011, 03:49:25 UTCpowerpc/cell: Use system_wq in cpufreq_spudemand With cmwq, there's no reason to use a separate workqueue in cpufreq_spudemand. Use system_wq instead. The work items are already sync canceled on stop, so it's already guaranteed that no work is running when spu_gov_exit() is entered. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: linuxppc-dev@lists.ozlabs.org Cc: Dave Jones <davej@redhat.com> Cc: cpufreq@vger.kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:34 UTC
f32be0c roel kluin31 December 2010, 04:57:46 UTCpowerpc/macintosh: Fix wrong test in fan_{read,write}_reg() Fix error test in fan_{read,write}_reg() Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:34 UTC
4c4a5cf Akinobu Mita24 December 2010, 20:03:59 UTCpowerpc/rtas_flash: Use simple_read_from_buffer Simplify read file operation for /proc/powerpc/rtas/* interface by using simple_read_from_buffer. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:34 UTC
63c3b9d Akinobu Mita24 December 2010, 20:03:56 UTCpowerpc/spufs: Use simple_write_to_buffer Simplify several write fileoperations for spufs by using simple_write_to_buffer(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:34 UTC
06ca218 Steven Rostedt22 December 2010, 16:42:56 UTCpowerpc/ppc32/tracing: Add stack frame to calls of trace_hardirqs_on/off 32-bit variant of the previous patch for 64-bit: << When an interrupt occurs in userspace, we can call trace_hardirqs_on/off() With one level stack. But if we have irqsoff tracing enabled, it checks both CALLER_ADDR0 and CALLER_ADDR1. The second call goes two stack frames up. If this is from user space, then there may not exist a second stack.... >> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:33 UTC
3cb5f1a Steven Rostedt23 December 2010, 19:46:06 UTCpowerpc/ppc64/tracing: Add stack frame to calls of trace_hardirqs_on/off When an interrupt occurs in userspace, we can call trace_hardirqs_on/off() With one level stack. But if we have irqsoff tracing enabled, it checks both CALLER_ADDR0 and CALLER_ADDR1. The second call goes two stack frames up. If this is from user space, then there may not exist a second stack. Add a second stack when calling trace_hardirqs_on/off() otherwise the following oops might occur: Oops: Kernel access of bad area, sig: 11 [#1] PREEMPT SMP NR_CPUS=2 PA Semi PWRficient last sysfs file: /sys/block/sda/size Modules linked in: ohci_hcd ehci_hcd usbcore NIP: c0000000000e1c00 LR: c0000000000034d4 CTR: 000000011012c440 REGS: c00000003e2f3af0 TRAP: 0300 Not tainted (2.6.37-rc6+) MSR: 9000000000001032 <ME,IR,DR> CR: 48044444 XER: 20000000 DAR: 00000001ffb9db50, DSISR: 0000000040000000 TASK = c00000003e1a00a0[2088] 'emacs' THREAD: c00000003e2f0000 CPU: 1 GPR00: 0000000000000001 c00000003e2f3d70 c00000000084e0d0 c0000000008816e8 GPR04: 000000001034c678 000000001032e8f9 0000000010336540 0000000040020000 GPR08: 0000000040020000 00000001ffb9db40 c00000003e2f3e30 0000000060000000 GPR12: 100000000000f032 c00000000fff0280 000000001032e8c9 0000000000000008 GPR16: 00000000105be9c0 00000000105be950 00000000105be9b0 00000000105be950 GPR20: 00000000ffb9dc50 00000000ffb9dbf0 00000000102f0000 00000000102f0000 GPR24: 00000000102e0000 00000000102f0000 0000000010336540 c0000000009ded38 GPR28: 00000000102e0000 c0000000000034d4 c0000000007ccb10 c00000003e2f3d70 NIP [c0000000000e1c00] .trace_hardirqs_off+0xb0/0x1d0 LR [c0000000000034d4] decrementer_common+0xd4/0x100 Call Trace: [c00000003e2f3d70] [c00000003e2f3e30] 0xc00000003e2f3e30 (unreliable) [c00000003e2f3e30] [c0000000000034d4] decrementer_common+0xd4/0x100 Instruction dump: 81690000 7f8b0000 419e0018 f84a0028 60000000 60000000 60000000 e95f0000 80030000 e92a0000 eb6301f8 2f800000 <eb890010> 41fe00dc a06d000a eb1e8050 ---[ end trace 4ec7fd2be9240928 ]--- Reported-by: Joerg Sommer <joerg@alea.gnuu.de> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:33 UTC
c033728 Michael Ellerman07 November 2010, 18:22:29 UTCpowerpc: Ensure the else case of feature sections will fit When we create an alternative feature section, the else case must be the same size or smaller than the body. This is because when we patch the else case in we just overwrite the body, so there must be room. Up to now we just did this by inspection, but it's quite easy to enforce it in the assembler, so we should. The only change is to add the ifgt block, but that effects the alignment of the tabs and so the whole macro is modified. Also add a test, but #if 0 it because we don't want to break the build. Anyone who's modifying the feature macros should enable the test. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>21 January 2011, 03:08:33 UTC
2b1caf6 Linus Torvalds21 January 2011, 02:30:37 UTCMerge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: smp: Allow on_each_cpu() to be called while early_boot_irqs_disabled status to init/main.c lockdep: Move early boot local IRQ enable/disable status to init/main.c21 January 2011, 02:30:37 UTC
d551d81 Rafael J. Wysocki19 January 2011, 21:27:55 UTCACPI / PM: Call suspend_nvs_free() earlier during resume It turns out that some device drivers map pages from the ACPI NVS region during resume using ioremap(), which conflicts with ioremap_cache() used for mapping those pages by the NVS save/restore code in nvs.c. Make the NVS pages mapped by the code in nvs.c be unmapped before device drivers' resume routines run. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 02:30:17 UTC
2d6d9fd Rafael J. Wysocki19 January 2011, 21:27:14 UTCACPI: Introduce acpi_os_ioremap() Commit ca9b600be38c ("ACPI / PM: Make suspend_nvs_save() use acpi_os_map_memory()") attempted to prevent the code in osl.c and nvs.c from using different ioremap() variants by making the latter use acpi_os_map_memory() for mapping the NVS pages. However, that also requires acpi_os_unmap_memory() to be used for unmapping them, which causes synchronize_rcu() to be executed many times in a row unnecessarily and introduces substantial delays during resume on some systems. Instead of using acpi_os_map_memory() for mapping the NVS pages in nvs.c introduce acpi_os_ioremap() calling ioremap_cache() and make the code in both osl.c and nvs.c use it. Reported-by: Jeff Chua <jeff.chua.linux@gmail.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 02:30:17 UTC
99d86c8 Jeff Layton21 January 2011, 02:19:25 UTCcifs: fix up CIFSSMBEcho for unaligned access Make sure that CIFSSMBEcho can handle unaligned fields. Also fix a minor bug that causes this warning: fs/cifs/cifssmb.c: In function 'CIFSSMBEcho': fs/cifs/cifssmb.c:740: warning: large integer implicitly truncated to unsigned type ...WordCount is u8, not __le16, so no need to convert it. This patch should apply cleanly on top of the rest of the patchset to clean up unaligned access. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>21 January 2011, 02:23:27 UTC
bf67b9b Steve French21 January 2011, 02:19:30 UTCMerge branch 'for-next'21 January 2011, 02:19:30 UTC
8d99641 Linus Torvalds21 January 2011, 01:02:14 UTCMerge branch 'akpm' * akpm: kernel/smp.c: consolidate writes in smp_call_function_interrupt() kernel/smp.c: fix smp_call_function_many() SMP race memcg: correctly order reading PCG_USED and pc->mem_cgroup backlight: fix 88pm860x_bl macro collision drivers/leds/ledtrig-gpio.c: make output match input, tighten input checking MAINTAINERS: update Atmel AT91 entry mm: fix truncate_setsize() comment memcg: fix rmdir, force_empty with THP memcg: fix LRU accounting with THP memcg: fix USED bit handling at uncharge in THP memcg: modify accounting function for supporting THP better fs/direct-io.c: don't try to allocate more than BIO_MAX_PAGES in a bio mm: compaction: prevent division-by-zero during user-requested compaction mm/vmscan.c: remove duplicate include of compaction.h memblock: fix memblock_is_region_memory() thp: keep highpte mapped until it is no longer needed kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT21 January 2011, 01:02:14 UTC
225c8e0 Milton Miller20 January 2011, 22:44:34 UTCkernel/smp.c: consolidate writes in smp_call_function_interrupt() We have to test the cpu mask in the interrupt handler before checking the refs, otherwise we can start to follow an entry before its deleted and find it partially initailzed for the next trip. Presently we also clear the cpumask bit before executing the called function, which implies getting write access to the line. After the function is called we then decrement refs, and if they go to zero we then unlock the structure. However, this implies getting write access to the call function data before and after another the function is called. If we can assert that no smp_call_function execution function is allowed to enable interrupts, then we can move both writes to after the function is called, hopfully allowing both writes with one cache line bounce. On a 256 thread system with a kernel compiled for 1024 threads, the time to execute testcase in the "smp_call_function_many race" changelog was reduced by about 30-40ms out of about 545 ms. I decided to keep this as WARN because its now a buggy function, even though the stack trace is of no value -- a simple printk would give us the information needed. Raw data: Without patch: ipi_test startup took 1219366ns complete 539819014ns total 541038380ns ipi_test startup took 1695754ns complete 543439872ns total 545135626ns ipi_test startup took 7513568ns complete 539606362ns total 547119930ns ipi_test startup took 13304064ns complete 533898562ns total 547202626ns ipi_test startup took 8668192ns complete 544264074ns total 552932266ns ipi_test startup took 4977626ns complete 548862684ns total 553840310ns ipi_test startup took 2144486ns complete 541292318ns total 543436804ns ipi_test startup took 21245824ns complete 530280180ns total 551526004ns With patch: ipi_test startup took 5961748ns complete 500859628ns total 506821376ns ipi_test startup took 8975996ns complete 495098924ns total 504074920ns ipi_test startup took 19797750ns complete 492204740ns total 512002490ns ipi_test startup took 14824796ns complete 487495878ns total 502320674ns ipi_test startup took 11514882ns complete 494439372ns total 505954254ns ipi_test startup took 8288084ns complete 502570774ns total 510858858ns ipi_test startup took 6789954ns complete 493388112ns total 500178066ns #include <linux/module.h> #include <linux/init.h> #include <linux/sched.h> /* sched clock */ #define ITERATIONS 100 static void do_nothing_ipi(void *dummy) { } static void do_ipis(struct work_struct *dummy) { int i; for (i = 0; i < ITERATIONS; i++) smp_call_function(do_nothing_ipi, NULL, 1); printk(KERN_DEBUG "cpu %d finished\n", smp_processor_id()); } static struct work_struct work[NR_CPUS]; static int __init testcase_init(void) { int cpu; u64 start, started, done; start = local_clock(); for_each_online_cpu(cpu) { INIT_WORK(&work[cpu], do_ipis); schedule_work_on(cpu, &work[cpu]); } started = local_clock(); for_each_online_cpu(cpu) flush_work(&work[cpu]); done = local_clock(); pr_info("ipi_test startup took %lldns complete %lldns total %lldns\n", started-start, done-started, done-start); return 0; } static void __exit testcase_exit(void) { } module_init(testcase_init) module_exit(testcase_exit) MODULE_LICENSE("GPL"); MODULE_AUTHOR("Anton Blanchard"); Signed-off-by: Milton Miller <miltonm@bga.com> Cc: Anton Blanchard <anton@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 01:02:06 UTC
6dc1989 Anton Blanchard20 January 2011, 22:44:33 UTCkernel/smp.c: fix smp_call_function_many() SMP race I noticed a failure where we hit the following WARN_ON in generic_smp_call_function_interrupt: if (!cpumask_test_and_clear_cpu(cpu, data->cpumask)) continue; data->csd.func(data->csd.info); refs = atomic_dec_return(&data->refs); WARN_ON(refs < 0); <------------------------- We atomically tested and cleared our bit in the cpumask, and yet the number of cpus left (ie refs) was 0. How can this be? It turns out commit 54fdade1c3332391948ec43530c02c4794a38172 ("generic-ipi: make struct call_function_data lockless") is at fault. It removes locking from smp_call_function_many and in doing so creates a rather complicated race. The problem comes about because: - The smp_call_function_many interrupt handler walks call_function.queue without any locking. - We reuse a percpu data structure in smp_call_function_many. - We do not wait for any RCU grace period before starting the next smp_call_function_many. Imagine a scenario where CPU A does two smp_call_functions back to back, and CPU B does an smp_call_function in between. We concentrate on how CPU C handles the calls: CPU A CPU B CPU C CPU D smp_call_function smp_call_function_interrupt walks call_function.queue sees data from CPU A on list smp_call_function smp_call_function_interrupt walks call_function.queue sees (stale) CPU A on list smp_call_function int clears last ref on A list_del_rcu, unlock smp_call_function reuses percpu *data A data->cpumask sees and clears bit in cpumask might be using old or new fn! decrements refs below 0 set data->refs (too late!) The important thing to note is since the interrupt handler walks a potentially stale call_function.queue without any locking, then another cpu can view the percpu *data structure at any time, even when the owner is in the process of initialising it. The following test case hits the WARN_ON 100% of the time on my PowerPC box (having 128 threads does help :) #include <linux/module.h> #include <linux/init.h> #define ITERATIONS 100 static void do_nothing_ipi(void *dummy) { } static void do_ipis(struct work_struct *dummy) { int i; for (i = 0; i < ITERATIONS; i++) smp_call_function(do_nothing_ipi, NULL, 1); printk(KERN_DEBUG "cpu %d finished\n", smp_processor_id()); } static struct work_struct work[NR_CPUS]; static int __init testcase_init(void) { int cpu; for_each_online_cpu(cpu) { INIT_WORK(&work[cpu], do_ipis); schedule_work_on(cpu, &work[cpu]); } return 0; } static void __exit testcase_exit(void) { } module_init(testcase_init) module_exit(testcase_exit) MODULE_LICENSE("GPL"); MODULE_AUTHOR("Anton Blanchard"); I tried to fix it by ordering the read and the write of ->cpumask and ->refs. In doing so I missed a critical case but Paul McKenney was able to spot my bug thankfully :) To ensure we arent viewing previous iterations the interrupt handler needs to read ->refs then ->cpumask then ->refs _again_. Thanks to Milton Miller and Paul McKenney for helping to debug this issue. [miltonm@bga.com: add WARN_ON and BUG_ON, remove extra read of refs before initial read of mask that doesn't help (also noted by Peter Zijlstra), adjust comments, hopefully clarify scenario ] [miltonm@bga.com: remove excess tests] Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Milton Miller <miltonm@bga.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: <stable@kernel.org> [2.6.32+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 01:02:06 UTC
713735b Johannes Weiner20 January 2011, 22:44:31 UTCmemcg: correctly order reading PCG_USED and pc->mem_cgroup The placement of the read-side barrier is confused: the writer first sets pc->mem_cgroup, then PCG_USED. The read-side barrier has to be between testing PCG_USED and reading pc->mem_cgroup. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 01:02:06 UTC
2550326 Randy Dunlap20 January 2011, 22:44:31 UTCbacklight: fix 88pm860x_bl macro collision Fix collision with kernel-supplied #define: drivers/video/backlight/88pm860x_bl.c:24:1: warning: "CURRENT_MASK" redefined arch/x86/include/asm/page_64_types.h:6:1: warning: this is the location of the previous definition Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Haojian Zhuang <haojian.zhuang@marvell.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 01:02:06 UTC
cc587ec Janusz Krzysztofik20 January 2011, 22:44:29 UTCdrivers/leds/ledtrig-gpio.c: make output match input, tighten input checking Replicate changes made to drivers/leds/ledtrig-backlight.c. Cc: Paul Mundt <lethal@linux-sh.org> Cc: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 01:02:06 UTC
c1fc867 Nicolas Ferre20 January 2011, 22:44:27 UTCMAINTAINERS: update Atmel AT91 entry Add two co-maintainers and update the entry with new information. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Andrew Victor <linux@maxim.org.za> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 01:02:06 UTC
382e27d Jan Kara20 January 2011, 22:44:26 UTCmm: fix truncate_setsize() comment Contrary to what the comment says, truncate_setsize() should be called *before* filesystem truncated blocks. Signed-off-by: Jan Kara <jack@suse.cz> Cc: Christoph Hellwig <hch@infradead.org> 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 January 2011, 01:02:06 UTC
987eba6 KAMEZAWA Hiroyuki20 January 2011, 22:44:25 UTCmemcg: fix rmdir, force_empty with THP Now, when THP is enabled, memcg's rmdir() function is broken because move_account() for THP page is not supported. This will cause account leak or -EBUSY issue at rmdir(). This patch fixes the issue by supporting move_account() THP pages. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 01:02:06 UTC
ece35ca KAMEZAWA Hiroyuki20 January 2011, 22:44:24 UTCmemcg: fix LRU accounting with THP memory cgroup's LRU stat should take care of size of pages because Transparent Hugepage inserts hugepage into LRU. If this value is the number wrong, memory reclaim will not work well. Note: only head page of THP's huge page is linked into LRU. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>21 January 2011, 01:02:06 UTC
back to top