dm snapshot: use mutex instead of rw_semaphore

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The rw_semaphore is acquired for read only in two places, neither is
performance-critical.  So replace it with a mutex -- which is more
efficient.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

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Mikulas Patocka 2017-11-23 16:15:43 -05:00 • committed by Mike Snitzer

parent 7690e25302

commit ae1093be5a

1 changed files with 43 additions and 41 deletions

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drivers/md/dm-snap.c

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