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author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:51 +1100 |
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committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:27 +1100 |
commit | 3c22cd5709e8143444a6d08682a87f4c57902df3 (patch) | |
tree | 6d245491d9103a1d77a3128ed5d1d996d3794300 /fs | |
parent | ff0c7d15f9787b7e8c601533c015295cc68329f8 (diff) | |
download | linux-stable-3c22cd5709e8143444a6d08682a87f4c57902df3.tar.gz linux-stable-3c22cd5709e8143444a6d08682a87f4c57902df3.tar.bz2 linux-stable-3c22cd5709e8143444a6d08682a87f4c57902df3.zip |
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')
0 files changed, 0 insertions, 0 deletions