diff options
| author | Jia He <[email protected]> | 2016-01-04 16:10:19 +1100 |
|---|---|---|
| committer | Dave Chinner <[email protected]> | 2016-01-04 16:10:19 +1100 |
| commit | 1d4292bfdc77f4f7c520064be15d0c46bd025fd2 (patch) | |
| tree | 0caa65a6a56e13d269503b38c211aafaef6cad0b | |
| parent | 168309855a7d1e16db751e9c647119fe2d2dc878 (diff) | |
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 <[email protected]>
Reviewed-by: Brian Foster <[email protected]>
Signed-off-by: Dave Chinner <[email protected]>
| -rw-r--r-- | fs/xfs/libxfs/xfs_bit.c | 6 |
1 files 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; } /* |