path: root/mm/pgtable-generic.c
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authorJoonsoo Kim <>2013-09-11 14:21:26 -0700
committerLinus Torvalds <>2013-09-11 15:57:29 -0700
commite66f09725771ac5b1b868d6b19eba84e30ffad88 (patch)
tree82cd7bb01c1253efa6c13986882fab63a50201e6 /mm/pgtable-generic.c
parent1da6f0e1b316d0215989fe4d7c657edead1fdea7 (diff)
mm, page_alloc: add unlikely macro to help compiler optimization
We rarely allocate a page with ALLOC_NO_WATERMARKS and it is used in slow path. For helping compiler optimization, add unlikely macro to ALLOC_NO_WATERMARKS checking. This patch doesn't have any effect now, because gcc already optimize this properly. But we cannot assume that gcc always does right and nobody re-evaluate if gcc do proper optimization with their change, for example, it is not optimized properly on v3.10. So adding compiler hint here is reasonable. Signed-off-by: Joonsoo Kim <> Acked-by: Johannes Weiner <> Cc: Minchan Kim <> Cc: Mel Gorman <> Cc: Rik van Riel <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'mm/pgtable-generic.c')
0 files changed, 0 insertions, 0 deletions