kernel-ark/block
Jens Axboe 11ccf116d0 block: fix warning with calling smp_processor_id() in preemptible section
After commit 5757a6d7 introduced an unsafe calling of
smp_processor_id(), with preempt debuggin turned on we spew a lot of:

BUG: using smp_processor_id() in preemptible [00000000] code: kjournald/514
caller is __make_request+0x1b8/0x308
[<c0019f44>] (unwind_backtrace+0x0/0xe8) from [<c024b4cc>] (debug_smp_processor_id+0xbc/0xf0)
[<c024b4cc>] (debug_smp_processor_id+0xbc/0xf0) from [<c0223d14>] (__make_request+0x1b8/0x308)
[<c0223d14>] (__make_request+0x1b8/0x308) from [<c02215ac>] (generic_make_request+0x4dc/0x558)
[<c02215ac>] (generic_make_request+0x4dc/0x558) from [<c022173c>] (submit_bio+0x114/0x138)
[<c022173c>] (submit_bio+0x114/0x138) from [<c011f504>] (submit_bh+0x148/0x16c)
[<c011f504>] (submit_bh+0x148/0x16c) from [<c0121ed8>] (__sync_dirty_buffer+0x88/0xd8)
[<c0121ed8>] (__sync_dirty_buffer+0x88/0xd8) from [<c01aff78>] (journal_commit_transaction+0x1198/0x1688)
[<c01aff78>] (journal_commit_transaction+0x1198/0x1688) from [<c01b4034>] (kjournald+0xb4/0x224)
[<c01b4034>] (kjournald+0xb4/0x224) from [<c0069ea0>] (kthread+0x8c/0x94)
[<c0069ea0>] (kthread+0x8c/0x94) from [<c00137f8>] (kernel_thread_exit+0x0/0x8)

Fix this by just using raw_smp_processor_id(), it's just a hint
after all. There's no pinning of the CPU or accessing per-cpu
structures involved.

Reported-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2011-07-26 15:01:15 +02:00
..
blk-cgroup.c cgroups: add per-thread subsystem callbacks 2011-05-26 17:12:34 -07:00
blk-cgroup.h cfq-iosched: Make IO merge related stats per cpu 2011-05-23 10:02:19 +02:00
blk-core.c block: fix warning with calling smp_processor_id() in preemptible section 2011-07-26 15:01:15 +02:00
blk-exec.c [SCSI] fix crash in scsi_dispatch_cmd() 2011-07-21 14:21:18 -07:00
blk-flush.c block: hold queue if flush is running for non-queueable flush drive 2011-05-06 11:36:25 -06:00
blk-integrity.c dm: improve block integrity support 2011-04-05 23:52:43 +02:00
blk-ioc.c Merge branch 'for-linus' into for-3.1/core 2011-07-01 16:17:13 +02:00
blk-iopoll.c tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
blk-lib.c block: fix patch import error in max_discard_sectors check 2011-07-23 20:34:59 +02:00
blk-map.c block: check for proper length of iov entries earlier in blk_rq_map_user_iov() 2010-11-29 10:04:50 +01:00
blk-merge.c block: attempt to merge with existing requests on plug flush 2011-03-21 10:14:27 +01:00
blk-settings.c block: Fix discard topology stacking and reporting 2011-05-18 10:37:35 +02:00
blk-softirq.c block: strict rq_affinity 2011-07-23 20:44:25 +02:00
blk-sysfs.c block: strict rq_affinity 2011-07-23 20:44:25 +02:00
blk-tag.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
blk-throttle.c blk-throttle: Make total_nr_queued unsigned 2011-06-13 20:19:27 +02:00
blk-timeout.c block: ensure jiffies wrap is handled correctly in blk_rq_timed_out_timer 2010-04-21 17:42:08 +02:00
blk.h Merge branch 'for-linus' into for-2.6.40/core 2011-05-20 20:36:16 +02:00
bsg.c bsg: fix address space warning from sparse 2011-06-20 13:27:45 +02:00
cfq-iosched.c CFQ: add think time check for group 2011-07-12 14:24:56 +02:00
cfq.h blk-cgroup: Add unaccounted time to timeslice_used. 2011-03-12 16:54:00 +01:00
compat_ioctl.c compat_ioctl: fix warning caused by qemu 2011-07-01 22:32:26 +02:00
deadline-iosched.c iosched: prevent aliased requests from starving other I/O 2011-06-02 21:19:05 +02:00
elevator.c iosched: prevent aliased requests from starving other I/O 2011-06-02 21:19:05 +02:00
genhd.c Merge branch 'for-3.1/core' of git://git.kernel.dk/linux-block 2011-07-25 10:33:36 -07:00
ioctl.c block: fix refcounting in BLKBSZSET 2011-02-24 08:54:21 -08:00
Kconfig kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT 2011-01-20 17:02:05 -08:00
Kconfig.iosched blk-cgroup: config options re-arrangement 2010-04-26 19:27:56 +02:00
Makefile Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block 2010-10-22 17:07:18 -07:00
noop-iosched.c block: remove per-queue plugging 2011-03-10 08:52:07 +01:00
scsi_ioctl.c block: take care not to overflow when calculating total iov length 2010-11-10 14:40:42 +01:00