]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
atomic: implement generic atomic_dec_if_positive()
authorShaohua Li <shli@kernel.org>
Mon, 8 Oct 2012 23:32:18 +0000 (16:32 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 9 Oct 2012 07:22:46 +0000 (16:22 +0900)
commite79bee24fd6134f90af4228cfebd010136d67631
treeecc678106bbf4672becca8f798aaf94276eaa2c4
parent435b405c06119d93333738172b8060b0ed12af41
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>
arch/microblaze/include/asm/atomic.h
arch/powerpc/include/asm/atomic.h
arch/x86/include/asm/atomic.h
include/linux/atomic.h