Commit 1d4292bf authored Jan 04, 2016 by Jia He Committed by Dave Chinner Jan 04, 2016

libxfs: Optimize the loop for xfs_bitmap_empty



If there is any non zero bit in a long bitmap, it can jump out of the
loop and finish the function as soon as possible.

Signed-off-by: Jia He <hejianet@gmail.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

parent 16830985

fs/xfs/libxfs/xfs_bit.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -32,13 +32,13 @@ int
		xfs_bitmap_empty(uint *map, uint size)
		{
		uint i;
		uint ret = 0;

		for (i = 0; i < size; i++) {
		ret \|= map[i];
		if (map[i] != 0)
		return 0;
		}

		return (ret == 0);
		return 1;
		}

		/*