diff options
| -rw-r--r-- | lib/bitmap.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c index 36e380d..a13c7f4 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -159,7 +159,7 @@ void __bitmap_shift_left(unsigned long *dst, const unsigned long *src, unsigned int shift, unsigned int nbits) { int k; - unsigned int lim = BITS_TO_LONGS(nbits), left = nbits % BITS_PER_LONG; + unsigned int lim = BITS_TO_LONGS(nbits); unsigned int off = shift/BITS_PER_LONG, rem = shift % BITS_PER_LONG; for (k = lim - off - 1; k >= 0; --k) { unsigned long upper, lower; @@ -172,13 +172,8 @@ void __bitmap_shift_left(unsigned long *dst, const unsigned long *src, lower = src[k - 1] >> (BITS_PER_LONG - rem); else lower = 0; - upper = src[k]; - if (left && k == lim - 1) - upper &= (1UL << left) - 1; - upper <<= rem; + upper = src[k] << rem; dst[k + off] = lower | upper; - if (left && k + off == lim - 1) - dst[k + off] &= (1UL << left) - 1; } if (off) memset(dst, 0, off*sizeof(unsigned long)); |
