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| author |   Jia He <hejianet@gmail.com> | 2016-01-04 16:10:19 +1100 |
|---|---|---|
| committer |   Dave Chinner <david@fromorbit.com> | 2016-01-04 16:10:19 +1100 |
| commit | 1d4292bfdc77f4f7c520064be15d0c46bd025fd2 (patch) | |
| tree | 0caa65a6a56e13d269503b38c211aafaef6cad0b /fs/xfs | |
| parent | Linux 4.4-rc8 (diff) | |
| download | linux-dev-1d4292bfdc77f4f7c520064be15d0c46bd025fd2.tar.xz linux-dev-1d4292bfdc77f4f7c520064be15d0c46bd025fd2.zip | |
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>
Diffstat (limited to 'fs/xfs')
| -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; } /* |