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(parent: ddf8440) | patch
blk-stat: don't use this_cpu_ptr() in a preemptable section
authorJens Axboe <axboe@fb.com>
Tue, 9 May 2017 17:39:56 +0000 (11:39 -0600)
committerJens Axboe <axboe@fb.com>
Wed, 10 May 2017 13:40:18 +0000 (07:40 -0600)
commit162d91f396a850dddbc81618c560901e5e8151b0
tree67770332a697a8496a60c75ca8583dec06b3cedatree | snapshot
parentddf84409e217579224085200173b584532c7fff5commit | diff
blk-stat: don't use this_cpu_ptr() in a preemptable section

If PREEMPT_RCU is enabled, rcu_read_lock() isn't strong enough
for us to use this_cpu_ptr() in that section. Use the safer
get/put_cpu_ptr() variants instead.

Reported-by: Mike Galbraith <efault@gmx.de>
Fixes: ea0d278a2710 ("blk-stat: convert to callback-based statistics reporting")
Signed-off-by: Jens Axboe <axboe@fb.com>
block/blk-stat.c diff | blob | history
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