Revision 8f46cca1e6c06a058374816887059bcc017b382f authored by Matt Redfearn on 22 September 2016, 16:15:47 UTC, committed by Ralf Baechle on 24 September 2016, 23:43:52 UTC
This patch fixes the possibility of a deadlock when bringing up secondary CPUs. The deadlock occurs because the set_cpu_online() is called before synchronise_count_slave(). This can cause a deadlock if the boot CPU, having scheduled another thread, attempts to send an IPI to the secondary CPU, which it sees has been marked online. The secondary is blocked in synchronise_count_slave() waiting for the boot CPU to enter synchronise_count_master(), but the boot cpu is blocked in smp_call_function_many() waiting for the secondary to respond to it's IPI request. Fix this by marking the CPU online in cpu_callin_map and synchronising counters before declaring the CPU online and calculating the maps for IPIs. Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Reported-by: Justin Chen <justinpopo6@gmail.com> Tested-by: Justin Chen <justinpopo6@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: stable@vger.kernel.org # v4.1+ Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14302/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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| File | Mode | Size |
|---|---|---|
| 842 | ||
| fonts | ||
| lz4 | ||
| lzo | ||
| mpi | ||
| raid6 | ||
| reed_solomon | ||
| xz | ||
| zlib_deflate | ||
| zlib_inflate | ||
| .gitignore | -rw-r--r-- | 70 bytes |
| Kconfig | -rw-r--r-- | 12.1 KB |
| Kconfig.debug | -rw-r--r-- | 67.9 KB |
| Kconfig.kasan | -rw-r--r-- | 1.8 KB |
| Kconfig.kgdb | -rw-r--r-- | 4.1 KB |
| Kconfig.kmemcheck | -rw-r--r-- | 2.9 KB |
| Kconfig.ubsan | -rw-r--r-- | 1.3 KB |
| Makefile | -rw-r--r-- | 7.2 KB |
| argv_split.c | -rw-r--r-- | 2.1 KB |
| asn1_decoder.c | -rw-r--r-- | 13.2 KB |
| assoc_array.c | -rw-r--r-- | 52.6 KB |
| atomic64.c | -rw-r--r-- | 4.8 KB |
| atomic64_test.c | -rw-r--r-- | 6.5 KB |
| audit.c | -rw-r--r-- | 1.7 KB |
| bcd.c | -rw-r--r-- | 261 bytes |
| bch.c | -rw-r--r-- | 35.6 KB |
| bitmap.c | -rw-r--r-- | 35.3 KB |
| bitrev.c | -rw-r--r-- | 1.9 KB |
| bsearch.c | -rw-r--r-- | 1.6 KB |
| btree.c | -rw-r--r-- | 19.2 KB |
| bug.c | -rw-r--r-- | 4.7 KB |
| build_OID_registry | -rwxr-xr-x | 4.7 KB |
| bust_spinlocks.c | -rw-r--r-- | 660 bytes |
| chacha20.c | -rw-r--r-- | 2.6 KB |
| check_signature.c | -rw-r--r-- | 599 bytes |
| checksum.c | -rw-r--r-- | 5.0 KB |
| clz_ctz.c | -rw-r--r-- | 1.3 KB |
| clz_tab.c | -rw-r--r-- | 855 bytes |
| cmdline.c | -rw-r--r-- | 4.1 KB |
| compat_audit.c | -rw-r--r-- | 796 bytes |
| cordic.c | -rw-r--r-- | 2.5 KB |
| cpu-notifier-error-inject.c | -rw-r--r-- | 1.2 KB |
| cpu_rmap.c | -rw-r--r-- | 7.8 KB |
| cpumask.c | -rw-r--r-- | 4.6 KB |
| crc-ccitt.c | -rw-r--r-- | 3.0 KB |
| crc-itu-t.c | -rw-r--r-- | 2.8 KB |
| crc-t10dif.c | -rw-r--r-- | 1.6 KB |
| crc16.c | -rw-r--r-- | 2.8 KB |
| crc32.c | -rw-r--r-- | 45.2 KB |
| crc32defs.h | -rw-r--r-- | 2.0 KB |
| crc7.c | -rw-r--r-- | 2.6 KB |
| crc8.c | -rw-r--r-- | 2.4 KB |
| ctype.c | -rw-r--r-- | 1.4 KB |
| debug_info.c | -rw-r--r-- | 741 bytes |
| debug_locks.c | -rw-r--r-- | 1.2 KB |
| debugobjects.c | -rw-r--r-- | 26.6 KB |
| dec_and_lock.c | -rw-r--r-- | 784 bytes |
| decompress.c | -rw-r--r-- | 1.7 KB |
| decompress_bunzip2.c | -rw-r--r-- | 23.5 KB |
| decompress_inflate.c | -rw-r--r-- | 4.4 KB |
| decompress_unlz4.c | -rw-r--r-- | 4.2 KB |
| decompress_unlzma.c | -rw-r--r-- | 15.8 KB |
| decompress_unlzo.c | -rw-r--r-- | 7.1 KB |
| decompress_unxz.c | -rw-r--r-- | 10.9 KB |
| devres.c | -rw-r--r-- | 9.8 KB |
| digsig.c | -rw-r--r-- | 5.6 KB |
| div64.c | -rw-r--r-- | 4.1 KB |
| dma-debug.c | -rw-r--r-- | 42.3 KB |
| dma-noop.c | -rw-r--r-- | 1.6 KB |
| dump_stack.c | -rw-r--r-- | 1.2 KB |
| dynamic_debug.c | -rw-r--r-- | 25.3 KB |
| dynamic_queue_limits.c | -rw-r--r-- | 4.3 KB |
| earlycpio.c | -rw-r--r-- | 4.0 KB |
| extable.c | -rw-r--r-- | 3.1 KB |
| fault-inject.c | -rw-r--r-- | 6.0 KB |
| fdt.c | -rw-r--r-- | 69 bytes |
| fdt_empty_tree.c | -rw-r--r-- | 80 bytes |
| fdt_ro.c | -rw-r--r-- | 72 bytes |
| fdt_rw.c | -rw-r--r-- | 72 bytes |
| fdt_strerror.c | -rw-r--r-- | 78 bytes |
| fdt_sw.c | -rw-r--r-- | 72 bytes |
| fdt_wip.c | -rw-r--r-- | 73 bytes |
| find_bit.c | -rw-r--r-- | 4.5 KB |
| flex_array.c | -rw-r--r-- | 11.0 KB |
| flex_proportions.c | -rw-r--r-- | 6.9 KB |
| gcd.c | -rw-r--r-- | 1.3 KB |
| gen_crc32table.c | -rw-r--r-- | 3.2 KB |
| genalloc.c | -rw-r--r-- | 21.6 KB |
| glob.c | -rw-r--r-- | 7.7 KB |
| halfmd4.c | -rw-r--r-- | 2.0 KB |
| hexdump.c | -rw-r--r-- | 8.3 KB |
| hweight.c | -rw-r--r-- | 2.0 KB |
| idr.c | -rw-r--r-- | 28.0 KB |
| inflate.c | -rw-r--r-- | 38.6 KB |
| int_sqrt.c | -rw-r--r-- | 652 bytes |
| interval_tree.c | -rw-r--r-- | 499 bytes |
| interval_tree_test.c | -rw-r--r-- | 2.3 KB |
| iomap.c | -rw-r--r-- | 6.5 KB |
| iomap_copy.c | -rw-r--r-- | 2.8 KB |
| iommu-common.c | -rw-r--r-- | 7.0 KB |
| iommu-helper.c | -rw-r--r-- | 1.0 KB |
| ioremap.c | -rw-r--r-- | 3.4 KB |
| iov_iter.c | -rw-r--r-- | 19.6 KB |
| irq_poll.c | -rw-r--r-- | 5.6 KB |
| irq_regs.c | -rw-r--r-- | 604 bytes |
| is_single_threaded.c | -rw-r--r-- | 1.3 KB |
| jedec_ddr_data.c | -rw-r--r-- | 3.0 KB |
| kasprintf.c | -rw-r--r-- | 1.4 KB |
| kfifo.c | -rw-r--r-- | 12.7 KB |
| klist.c | -rw-r--r-- | 10.3 KB |
| kobject.c | -rw-r--r-- | 26.0 KB |
| kobject_uevent.c | -rw-r--r-- | 11.3 KB |
| kstrtox.c | -rw-r--r-- | 10.6 KB |
| kstrtox.h | -rw-r--r-- | 254 bytes |
| lcm.c | -rw-r--r-- | 441 bytes |
| libcrc32c.c | -rw-r--r-- | 2.1 KB |
| list_debug.c | -rw-r--r-- | 2.6 KB |
| list_sort.c | -rw-r--r-- | 6.8 KB |
| llist.c | -rw-r--r-- | 3.1 KB |
| locking-selftest-hardirq.h | -rw-r--r-- | 207 bytes |
| locking-selftest-mutex.h | -rw-r--r-- | 120 bytes |
| locking-selftest-rlock-hardirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-rlock-softirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-rlock.h | -rw-r--r-- | 158 bytes |
| locking-selftest-rsem.h | -rw-r--r-- | 163 bytes |
| locking-selftest-softirq.h | -rw-r--r-- | 207 bytes |
| locking-selftest-spin-hardirq.h | -rw-r--r-- | 73 bytes |
| locking-selftest-spin-softirq.h | -rw-r--r-- | 73 bytes |
| locking-selftest-spin.h | -rw-r--r-- | 118 bytes |
| locking-selftest-wlock-hardirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-wlock-softirq.h | -rw-r--r-- | 74 bytes |
| locking-selftest-wlock.h | -rw-r--r-- | 158 bytes |
| locking-selftest-wsem.h | -rw-r--r-- | 163 bytes |
| locking-selftest.c | -rw-r--r-- | 40.1 KB |
| lockref.c | -rw-r--r-- | 3.9 KB |
| lru_cache.c | -rw-r--r-- | 19.4 KB |
| md5.c | -rw-r--r-- | 3.7 KB |
| memory-notifier-error-inject.c | -rw-r--r-- | 1.1 KB |
| memweight.c | -rw-r--r-- | 999 bytes |
| net_utils.c | -rw-r--r-- | 604 bytes |
| netdev-notifier-error-inject.c | -rw-r--r-- | 1.5 KB |
| nlattr.c | -rw-r--r-- | 15.7 KB |
| nmi_backtrace.c | -rw-r--r-- | 2.3 KB |
| nodemask.c | -rw-r--r-- | 617 bytes |
| notifier-error-inject.c | -rw-r--r-- | 2.7 KB |
| notifier-error-inject.h | -rw-r--r-- | 614 bytes |
| of-reconfig-notifier-error-inject.c | -rw-r--r-- | 1.3 KB |
| oid_registry.c | -rw-r--r-- | 3.8 KB |
| once.c | -rw-r--r-- | 1.3 KB |
| parser.c | -rw-r--r-- | 7.1 KB |
| pci_iomap.c | -rw-r--r-- | 4.2 KB |
| percpu-refcount.c | -rw-r--r-- | 11.7 KB |
| percpu_counter.c | -rw-r--r-- | 5.5 KB |
| percpu_ida.c | -rw-r--r-- | 9.5 KB |
| percpu_test.c | -rw-r--r-- | 3.2 KB |
| plist.c | -rw-r--r-- | 5.9 KB |
| pm-notifier-error-inject.c | -rw-r--r-- | 1.1 KB |
| radix-tree.c | -rw-r--r-- | 44.5 KB |
| random32.c | -rw-r--r-- | 12.7 KB |
| ratelimit.c | -rw-r--r-- | 1.6 KB |
| rational.c | -rw-r--r-- | 1.5 KB |
| rbtree.c | -rw-r--r-- | 16.9 KB |
| rbtree_test.c | -rw-r--r-- | 5.5 KB |
| reciprocal_div.c | -rw-r--r-- | 492 bytes |
| rhashtable.c | -rw-r--r-- | 20.8 KB |
| scatterlist.c | -rw-r--r-- | 18.8 KB |
| seq_buf.c | -rw-r--r-- | 7.8 KB |
| sg_pool.c | -rw-r--r-- | 3.6 KB |
| sg_split.c | -rw-r--r-- | 5.1 KB |
| sha1.c | -rw-r--r-- | 6.1 KB |
| show_mem.c | -rw-r--r-- | 1.2 KB |
| smp_processor_id.c | -rw-r--r-- | 1.3 KB |
| sort.c | -rw-r--r-- | 2.9 KB |
| stackdepot.c | -rw-r--r-- | 8.4 KB |
| stmp_device.c | -rw-r--r-- | 2.1 KB |
| string.c | -rw-r--r-- | 20.0 KB |
| string_helpers.c | -rw-r--r-- | 13.5 KB |
| strncpy_from_user.c | -rw-r--r-- | 3.0 KB |
| strnlen_user.c | -rw-r--r-- | 4.3 KB |
| swiotlb.c | -rw-r--r-- | 27.3 KB |
| syscall.c | -rw-r--r-- | 2.4 KB |
| test-kstrtox.c | -rw-r--r-- | 17.3 KB |
| test-string_helpers.c | -rw-r--r-- | 10.3 KB |
| test_bitmap.c | -rw-r--r-- | 9.0 KB |
| test_bpf.c | -rw-r--r-- | 133.7 KB |
| test_firmware.c | -rw-r--r-- | 4.3 KB |
| test_hash.c | -rw-r--r-- | 6.3 KB |
| test_hexdump.c | -rw-r--r-- | 5.7 KB |
| test_kasan.c | -rw-r--r-- | 8.7 KB |
| test_module.c | -rw-r--r-- | 753 bytes |
| test_printf.c | -rw-r--r-- | 12.4 KB |
| test_rhashtable.c | -rw-r--r-- | 10.3 KB |
| test_static_key_base.c | -rw-r--r-- | 2.0 KB |
| test_static_keys.c | -rw-r--r-- | 6.0 KB |
| test_user_copy.c | -rw-r--r-- | 3.1 KB |
| test_uuid.c | -rw-r--r-- | 3.4 KB |
| textsearch.c | -rw-r--r-- | 9.4 KB |
| timerqueue.c | -rw-r--r-- | 3.2 KB |
| ts_bm.c | -rw-r--r-- | 5.3 KB |
| ts_fsm.c | -rw-r--r-- | 10.6 KB |
| ts_kmp.c | -rw-r--r-- | 4.3 KB |
| ubsan.c | -rw-r--r-- | 10.9 KB |
| ubsan.h | -rw-r--r-- | 1.5 KB |
| ucs2_string.c | -rw-r--r-- | 2.4 KB |
| uuid.c | -rw-r--r-- | 3.1 KB |
| vsprintf.c | -rw-r--r-- | 66.6 KB |
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