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| author | David Howells <dhowells@redhat.com> | 2009-05-06 16:03:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-05-06 16:36:10 -0700 |
| commit | 9155203a5de94278525647b16733f0c315f3b786 (patch) | |
| tree | 68d64b7cf9671c2a725f4f191b3cfb4b37e41f32 /mm/page_alloc.c | |
| parent | 74614f8d9d4141a3752fc1c38706859b63f4842b (diff) | |
| download | lwn-9155203a5de94278525647b16733f0c315f3b786.tar.gz lwn-9155203a5de94278525647b16733f0c315f3b786.zip | |
mm: use roundown_pow_of_two() in zone_batchsize()
Use roundown_pow_of_two(N) in zone_batchsize() rather than (1 <<
(fls(N)-1)) as they are equivalent, and with the former it is easier to
see what is going on.
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Lanttor Guo <lanttor.guo@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e2f26991fff1..8add7daf98b0 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2706,7 +2706,7 @@ static int zone_batchsize(struct zone *zone) * of pages of one half of the possible page colors * and the other with pages of the other colors. */ - batch = (1 << (fls(batch + batch/2)-1)) - 1; + batch = rounddown_pow_of_two(batch + batch/2) - 1; return batch; } |