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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>
This commit is contained in:
Akinobu Mita 2009-12-15 16:46:55 -08:00 committed by Linus Torvalds
parent e3c96f53ac
commit c2923c3a3e
1 changed files with 2 additions and 5 deletions
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7
fs/hpfs/super.c
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@ -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;
}