Commit 9155203a authored May 06, 2009 by David Howells Committed by Linus Torvalds May 06, 2009

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>

parent 74614f8d

mm/page_alloc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}