From 1d4292bfdc77f4f7c520064be15d0c46bd025fd2 Mon Sep 17 00:00:00 2001 From: Jia He Date: Mon, 4 Jan 2016 16:10:19 +1100 Subject: [PATCH] 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 Reviewed-by: Brian Foster Signed-off-by: Dave Chinner --- fs/xfs/libxfs/xfs_bit.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/xfs/libxfs/xfs_bit.c b/fs/xfs/libxfs/xfs_bit.c index 0e8885a59646..0a94cce5ea35 100644 --- a/fs/xfs/libxfs/xfs_bit.c +++ b/fs/xfs/libxfs/xfs_bit.c @@ -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; } /*