[PATCH] bitops: hweight() related cleanup
Akinobu Mita [Sun, 26 Mar 2006 09:39:56 +0000 (01:39 -0800)]
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>

drivers/ieee1394/highlevel.c
lib/bitmap.c

index 734b121..491e603 100644 (file)
@@ -306,8 +306,7 @@ u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
        u64 align_mask = ~(alignment - 1);
 
        if ((alignment & 3) || (alignment > 0x800000000000ULL) ||
-           ((hweight32(alignment >> 32) +
-             hweight32(alignment & 0xffffffff) != 1))) {
+           (hweight64(alignment) != 1)) {
                HPSB_ERR("%s called with invalid alignment: 0x%048llx",
                         __FUNCTION__, (unsigned long long)alignment);
                return retval;
index 8acab0e..ed2ae3b 100644 (file)
@@ -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);
 
 /*