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| author | Nick Piggin <npiggin@suse.de> | 2008-08-02 12:02:13 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-04 21:56:09 -0700 |
| commit | ca5de404ff036a29b25e9a83f6919c9f606c5841 (patch) | |
| tree | 474da867c4d4086313cee90cdc3560bb17fade96 /include/linux/buffer_head.h | |
| parent | 529ae9aaa08378cfe2a4350bded76f32cc8ff0ce (diff) | |
| download | blackbird-op-linux-ca5de404ff036a29b25e9a83f6919c9f606c5841.tar.gz blackbird-op-linux-ca5de404ff036a29b25e9a83f6919c9f606c5841.zip | |
fs: rename buffer trylock
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>
Diffstat (limited to 'include/linux/buffer_head.h')
| -rw-r--r-- | include/linux/buffer_head.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 50cfe8ceb478..eadaab44015f 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -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); } |
