Nick Piggin 3c22cd5709 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>

2011-01-07 17:50:27 +11:00

6.7 KiB

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