| commit | 3c22cd5709e8143444a6d08682a87f4c57902df3 | [log] [tgz] |
|---|---|---|
| author | Nick Piggin <npiggin@kernel.dk> | Fri Jan 07 17:49:51 2011 +1100 |
| committer | Nick Piggin <npiggin@kernel.dk> | Fri Jan 07 17:50:27 2011 +1100 |
| tree | 6d245491d9103a1d77a3128ed5d1d996d3794300 | |
| parent | ff0c7d15f9787b7e8c601533c015295cc68329f8 [diff] |
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>