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[PATCH] bitops: hweight() related cleanup

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By defining generic hweight*() routines

- hweight64() will be defined on all architectures
- hweight_long() will use architecture optimized hweight32() or hweight64()

I found two possible cleanups by these reasons.

Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Akinobu Mita 2006-03-26 01:39:56 -08:00 • committed by Linus Torvalds
parent e9bebd6f3a
commit 37d54111c1
2 changed files with 3 additions and 19 deletions
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19
lib/bitmap.c
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@ -253,33 +253,18 @@ int __bitmap_subset(const unsigned long *bitmap1,
}
EXPORT_SYMBOL(__bitmap_subset);
#if BITS_PER_LONG == 32
int __bitmap_weight(const unsigned long *bitmap, int bits)
{
int k, w = 0, lim = bits/BITS_PER_LONG;
for (k = 0; k < lim; k++)
w += hweight32(bitmap[k]);
w += hweight_long(bitmap[k]);
if (bits % BITS_PER_LONG)
w += hweight32(bitmap[k] & BITMAP_LAST_WORD_MASK(bits));
w += hweight_long(bitmap[k] & BITMAP_LAST_WORD_MASK(bits));
return w;
}
#else
int __bitmap_weight(const unsigned long *bitmap, int bits)
{
int k, w = 0, lim = bits/BITS_PER_LONG;
for (k = 0; k < lim; k++)
w += hweight64(bitmap[k]);
if (bits % BITS_PER_LONG)
w += hweight64(bitmap[k] & BITMAP_LAST_WORD_MASK(bits));
return w;
}
#endif
EXPORT_SYMBOL(__bitmap_weight);
/*