diff options
Diffstat (limited to 'lib/bitmap.c')
| -rw-r--r-- | lib/bitmap.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c index 1e031f2c9ab..b499ab6ada2 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -131,7 +131,9 @@ void __bitmap_shift_right(unsigned long *dst, lower = src[off + k]; if (left && off + k == lim - 1) lower &= mask; - dst[k] = upper << (BITS_PER_LONG - rem) | lower >> rem; + dst[k] = lower >> rem; + if (rem) + dst[k] |= upper << (BITS_PER_LONG - rem); if (left && k == lim - 1) dst[k] &= mask; } @@ -172,7 +174,9 @@ void __bitmap_shift_left(unsigned long *dst, upper = src[k]; if (left && k == lim - 1) upper &= (1UL << left) - 1; - dst[k + off] = lower >> (BITS_PER_LONG - rem) | upper << rem; + dst[k + off] = upper << rem; + if (rem) + dst[k + off] |= lower >> (BITS_PER_LONG - rem); if (left && k + off == lim - 1) dst[k + off] &= (1UL << left) - 1; } @@ -884,7 +888,7 @@ EXPORT_SYMBOL(bitmap_bitremap); * read it, you're overqualified for your current job.) * * In other words, @orig is mapped onto (surjectively) @dst, - * using the the map { <n, m> | the n-th bit of @relmap is the + * using the map { <n, m> | the n-th bit of @relmap is the * m-th set bit of @relmap }. * * Any set bits in @orig above bit number W, where W is the @@ -932,7 +936,7 @@ EXPORT_SYMBOL(bitmap_bitremap); * * Further lets say we use the following code, invoking * bitmap_fold() then bitmap_onto, as suggested above to - * avoid the possitility of an empty @dst result: + * avoid the possibility of an empty @dst result: * * unsigned long *tmp; // a temporary bitmap's bits * |