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>
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@ -119,11 +119,8 @@ unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
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unsigned i, count;
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unsigned i, count;
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if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0;
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if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0;
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count = 0;
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count = 0;
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for (i = 0; i < 2048 / sizeof(unsigned); i++) {
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for (i = 0; i < 2048 / sizeof(unsigned); i++)
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unsigned b;
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count += hweight32(bits[i]);
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if (!bits[i]) continue;
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for (b = bits[i]; b; b>>=1) count += b & 1;
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}
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hpfs_brelse4(&qbh);
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hpfs_brelse4(&qbh);
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return count;
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return count;
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}
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}
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