diff options
| author | Shaohua Li <shli@kernel.org> | 2012-10-09 01:32:18 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 09:22:46 +0200 |
| commit | e79bee24fd6134f90af4228cfebd010136d67631 (patch) | |
| tree | ecc678106bbf4672becca8f798aaf94276eaa2c4 /arch/powerpc | |
| parent | memory-hotplug: fix pages missed by race rather than failing (diff) | |
| download | linux-e79bee24fd6134f90af4228cfebd010136d67631.tar.xz linux-e79bee24fd6134f90af4228cfebd010136d67631.zip | |
atomic: implement generic atomic_dec_if_positive()
The x86 implementation of atomic_dec_if_positive is quite generic, so make
it available to all architectures.
This is needed for "swap: add a simple detector for inappropriate swapin
readahead".
[akpm@linux-foundation.org: do the "#define foo foo" trick in the conventional manner]
Signed-off-by: Shaohua Li <shli@fusionio.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Rik van Riel <riel@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/atomic.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/atomic.h b/arch/powerpc/include/asm/atomic.h index da29032ae38f..e3b1d41c89be 100644 --- a/arch/powerpc/include/asm/atomic.h +++ b/arch/powerpc/include/asm/atomic.h @@ -268,6 +268,7 @@ static __inline__ int atomic_dec_if_positive(atomic_t *v) return t; } +#define atomic_dec_if_positive atomic_dec_if_positive #define smp_mb__before_atomic_dec() smp_mb() #define smp_mb__after_atomic_dec() smp_mb() |