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| author | Nick Piggin <npiggin@suse.de> | 2008-11-11 17:51:18 (GMT) |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-11-19 05:04:57 (GMT) |
| commit | 957ab07b44d839ee8267e827fc4e8f1853798f57 (patch) | |
| tree | d282112a07dfc82dfc44522ad9e5a0baffdd6888 /arch/powerpc/include/asm/mutex.h | |
| parent | 46d075be585eae2b74265e4e64ca38dde16a09c6 (diff) | |
| download | linux-fsl-qoriq-957ab07b44d839ee8267e827fc4e8f1853798f57.tar.xz | |
powerpc: Optimise smp_rmb
After commit 598056d5af8fef1dbe8f96f5c2b641a528184e5a ("[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>
Diffstat (limited to 'arch/powerpc/include/asm/mutex.h')
0 files changed, 0 insertions, 0 deletions