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authorNick Piggin <npiggin@suse.de>2008-08-02 12:02:13 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-04 21:56:09 -0700
commitca5de404ff036a29b25e9a83f6919c9f606c5841 (patch)
tree474da867c4d4086313cee90cdc3560bb17fade96 /include/linux/buffer_head.h
parent529ae9aaa08378cfe2a4350bded76f32cc8ff0ce (diff)
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.h8
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);
}