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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 06:49:51 (GMT) |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 06:50:27 (GMT) |
| commit | 3c22cd5709e8143444a6d08682a87f4c57902df3 (patch) | |
| tree | 6d245491d9103a1d77a3128ed5d1d996d3794300 /fs/btrfs | |
| parent | ff0c7d15f9787b7e8c601533c015295cc68329f8 (diff) | |
| download | linux-fsl-qoriq-3c22cd5709e8143444a6d08682a87f4c57902df3.tar.xz | |
kernel: optimise seqlock
Add branch annotations for seqlock read fastpath, and introduce
__read_seqcount_begin and __read_seqcount_end functions, that can avoid the
smp_rmb() if used carefully. These will be used by store-free path walking
algorithm performance is critical and seqlocks are in use.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/btrfs')
0 files changed, 0 insertions, 0 deletions