The patch titled
Subject: lib: bitmap: yet another simplification in __bitmap_shift_right
has been removed from the -mm tree. Its filename was
lib-bitmap-yet-another-simplification-in-__bitmap_shift_right.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Subject: lib: bitmap: yet another simplification in __bitmap_shift_right
If left is 0, we can just let mask be ~0UL, so that anding with it is a
no-op. Conveniently, BITMAP_LAST_WORD_MASK provides precisely what we
need, and we can eliminate left.
Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/bitmap.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff -puN lib/bitmap.c~lib-bitmap-yet-another-simplification-in-__bitmap_shift_right lib/bitmap.c
--- a/lib/bitmap.c~lib-bitmap-yet-another-simplification-in-__bitmap_shift_right
+++ a/lib/bitmap.c
@@ -113,9 +113,9 @@ EXPORT_SYMBOL(__bitmap_complement);
void __bitmap_shift_right(unsigned long *dst, const unsigned long *src,
unsigned shift, unsigned nbits)
{
- unsigned k, lim = BITS_TO_LONGS(nbits), left = nbits % BITS_PER_LONG;
+ unsigned k, lim = BITS_TO_LONGS(nbits);
unsigned off = shift/BITS_PER_LONG, rem = shift % BITS_PER_LONG;
- unsigned long mask = (1UL << left) - 1;
+ unsigned long mask = BITMAP_LAST_WORD_MASK(nbits);
for (k = 0; off + k < lim; ++k) {
unsigned long upper, lower;
@@ -127,12 +127,12 @@ void __bitmap_shift_right(unsigned long
upper = 0;
else {
upper = src[off + k + 1];
- if (off + k + 1 == lim - 1 && left)
+ if (off + k + 1 == lim - 1)
upper &= mask;
upper <<= (BITS_PER_LONG - rem);
}
lower = src[off + k];
- if (left && off + k == lim - 1)
+ if (off + k == lim - 1)
lower &= mask;
lower >>= rem;
dst[k] = lower | upper;
_
Patches currently in -mm which might be from linux@xxxxxxxxxxxxxxxxxx are
origin.patch
linux-next.patch
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