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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2009-12-15 16:46:55 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-16 07:20:06 -0800 |
| commit | c2923c3a3ed71563891585bf58481bcdde72f403 (patch) | |
| tree | 76bdaff56934ec453fb637eeb54dd665539c8099 /fs | |
| parent | e3c96f53ac132743fda1384910feb863a2eab916 (diff) | |
| download | lwn-c2923c3a3ed71563891585bf58481bcdde72f403.tar.gz lwn-c2923c3a3ed71563891585bf58481bcdde72f403.zip | |
hpfs: use hweight32
Use hweight32 instead of counting for each bit
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/hpfs/super.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c index f2feaa06bf26..cf6fe4ad651a 100644 --- a/fs/hpfs/super.c +++ b/fs/hpfs/super.c @@ -119,11 +119,8 @@ unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) unsigned i, count; if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0; count = 0; - for (i = 0; i < 2048 / sizeof(unsigned); i++) { - unsigned b; - if (!bits[i]) continue; - for (b = bits[i]; b; b>>=1) count += b & 1; - } + for (i = 0; i < 2048 / sizeof(unsigned); i++) + count += hweight32(bits[i]); hpfs_brelse4(&qbh); return count; } |