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fs: rename buffer trylock

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Like the page lock change, this also requires name change, so convert the
raw test_and_set bitop to a trylock.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nick Piggin 2008-08-02 12:02:13 +02:00 • committed by Linus Torvalds
parent 529ae9aaa0
commit ca5de404ff
9 changed files with 17 additions and 13 deletions
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8
include/linux/buffer_head.h
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@ -115,7 +115,6 @@ BUFFER_FNS(Uptodate, uptodate)
BUFFER_FNS(Dirty, dirty)
TAS_BUFFER_FNS(Dirty, dirty)
BUFFER_FNS(Lock, locked)
TAS_BUFFER_FNS(Lock, locked)
BUFFER_FNS(Req, req)
TAS_BUFFER_FNS(Req, req)
BUFFER_FNS(Mapped, mapped)
@ -321,10 +320,15 @@ static inline void wait_on_buffer(struct buffer_head *bh)
__wait_on_buffer(bh);
}
static inline int trylock_buffer(struct buffer_head *bh)
{
return likely(!test_and_set_bit(BH_Lock, &bh->b_state));
}
static inline void lock_buffer(struct buffer_head *bh)
{
might_sleep();
if (test_set_buffer_locked(bh))
if (!trylock_buffer(bh))
__lock_buffer(bh);
}