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(parent: 9c1d4de) | patch
dm cache policy mq: protect residency method with existing mutex
authorJoe Thornber <ejt@redhat.com>
Mon, 21 Oct 2013 10:44:57 +0000 (11:44 +0100)
committerMike Snitzer <snitzer@redhat.com>
Sat, 9 Nov 2013 22:54:34 +0000 (17:54 -0500)
commit99ba2ae4cd876bbcedb01d94c1a7952ce171418e
treee150c06aff63538e6c64ff29a88f6afdb9d9fe20tree | snapshot
parent9c1d4de56066e4d6abc66ec188faafd7b303fb08commit | diff
dm cache policy mq: protect residency method with existing mutex

It is safe to use a mutex in mq_residency() at this point since it is
only called from ioctl context.  But future-proof mq_residency() by
using might_sleep() to catch new contexts that cannot sleep.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
drivers/md/dm-cache-policy-mq.c diff | blob | history
Domain: System / Kernel;