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Jens Axboe d6de8be711 cfq-iosched: fix RCU problem in cfq_cic_lookup() 
cfq_cic_lookup() needs to properly protect ioc->ioc_data before
dereferencing it and also exclude updaters of ioc->ioc_data as well.

Also add a number of comments documenting why the existing RCU usage
is OK.

Thanks a lot to "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> for
review and comments!

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-05-28 14:49:28 +02:00
..
as-iosched.c
blk-barrier.c block: remove remaining __FUNCTION__ occurrences 2008-05-01 08:04:02 -07:00
blk-core.c block: Move the second call to get_request to the end of the loop 2008-05-28 14:49:27 +02:00
blk-exec.c
blk-ioc.c cfq-iosched: fix RCU race in the cfq io_context destructor handling 2008-05-07 09:28:57 +02:00
blk-map.c block: add dma alignment and padding support to blk_rq_map_kern 2008-04-29 09:50:34 +02:00
blk-merge.c block: get rid of likely/unlikely predictions in merge logic 2008-05-07 09:33:55 +02:00
blk-settings.c Remove blkdev warning triggered by using md 2008-05-14 19:11:15 -07:00
blk-sysfs.c block: sysfs store function needs to grab queue_lock and use queue_flag_*() 2008-05-07 09:09:39 +02:00
blk-tag.c block: adjust tagging function queue bit locking 2008-05-07 09:27:43 +02:00
blk.h block: rename and export rq_init() 2008-04-29 14:48:55 +02:00
blktrace.c block: make blktrace use per-cpu buffers for message notes 2008-05-28 14:49:27 +02:00
bsg.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-05-02 13:52:35 -07:00
cfq-iosched.c cfq-iosched: fix RCU problem in cfq_cic_lookup() 2008-05-28 14:49:28 +02:00
compat_ioctl.c Fix misuses of bdevname() 2008-05-13 08:02:26 -07:00
deadline-iosched.c
elevator.c Added in elevator switch message to blktrace stream 2008-05-28 14:49:27 +02:00
genhd.c block: do_mounts - accept root=<non-existant partition> 2008-05-14 10:37:57 -07:00
ioctl.c
Kconfig
Kconfig.iosched
Makefile
noop-iosched.c
scsi_ioctl.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-05-02 13:52:35 -07:00