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(parent: 957ab07) | patch
powerpc: Optimise mutex
authorNick Piggin <npiggin@suse.de>
Tue, 11 Nov 2008 17:54:15 +0000 (17:54 +0000)
committerPaul Mackerras <paulus@samba.org>
Wed, 19 Nov 2008 05:04:58 +0000 (16:04 +1100)
commitae564c63b8311fa73c21e456e00dba1f4b1ff6bc
tree743ed995f8718d465c8008a61755ea47feb73f6etree | snapshot
parent957ab07b44d839ee8267e827fc4e8f1853798f57commit | diff
powerpc: Optimise mutex

This implements an optimised mutex fastpath for powerpc, making use of
acquire and release barrier semantics.  This takes the mutex
lock+unlock benchmark from 203 to 173 cycles on a G5.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
arch/powerpc/include/asm/mutex.h diff | blob | history
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