drivers/staging/exfat: Replace more binary semaphores with mutexes

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At a slight footprint cost (24 vs 32 bytes), mutexes are more optimal
than semaphores; it's also a nicer interface for mutual exclusion,
which is why they are encouraged over binary semaphores, when possible.
There is also lockdep support.

For both f_sem and b_sem, their semantics imply traditional lock
ownership; that is, the lock owner is the same for both lock/unlock
operations and not under irq contexts (ie for trylock/unlock scenarios).
Therefore it is safe to convert.

Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Link: https://lore.kernel.org/r/20191101185332.31786-1-dave@stgolabs.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Davidlohr Bueso 2019-11-01 11:53:32 -07:00 • committed by Greg Kroah-Hartman

parent 8823d99080

commit 74179976b0

1 changed files with 24 additions and 24 deletions

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drivers/staging/exfat/exfat_cache.c

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