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-rw-r--r--lib/bitmap.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 74bdf3601245..36e380da00c5 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -169,15 +169,14 @@ void __bitmap_shift_left(unsigned long *dst, const unsigned long *src,
* word below and make them the bottom rem bits of result.
*/
if (rem && k > 0)
- lower = src[k - 1];
+ lower = src[k - 1] >> (BITS_PER_LONG - rem);
else
lower = 0;
upper = src[k];
if (left && k == lim - 1)
upper &= (1UL << left) - 1;
- dst[k + off] = upper << rem;
- if (rem)
- dst[k + off] |= lower >> (BITS_PER_LONG - rem);
+ upper <<= rem;
+ dst[k + off] = lower | upper;
if (left && k + off == lim - 1)
dst[k + off] &= (1UL << left) - 1;
}