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authorNick Piggin <npiggin@kernel.dk>2011-01-07 17:49:51 +1100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 17:50:27 +1100
commit3c22cd5709e8143444a6d08682a87f4c57902df3 (patch)
tree6d245491d9103a1d77a3128ed5d1d996d3794300 /security/security.c
parentff0c7d15f9787b7e8c601533c015295cc68329f8 (diff)
downloadlinux-3c22cd5709e8143444a6d08682a87f4c57902df3.tar.bz2
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 'security/security.c')
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