summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--lib/bitmap.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 36e380da00c5..a13c7f4e325a 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));