Nick Piggin 957ab07b44 powerpc: Optimise smp_rmb ... After commit 598056d5af ("[POWERPC] Fix rmb to order cacheable vs. noncacheable"), rmb() becomes a sync instruction, which is needed to order cacheable vs noncacheable loads. However smp_rmb() is #defined to rmb(), and smp_rmb() can be an lwsync. This restores smp_rmb() performance by using lwsync there and updates the comments. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>		2008-11-19 16:04:57 +11:00
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asm	powerpc: Optimise smp_rmb	2008-11-19 16:04:57 +11:00