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(parent: 340ff32) | 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)
commitd3738123986954ba3abbd96b595f5176b50c3f5d
tree67770332a697a8496a60c75ca8583dec06b3cedatree | snapshot (tar.gz zip)
parent340ff3216799a947fe0b07bed8f0409ffc716be9commit | 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: 34dbad5d26e2 ("blk-stat: convert to callback-based statistics reporting")
Signed-off-by: Jens Axboe <axboe@fb.com>
block/blk-stat.c diff | blob | blame | history