The patch titled
Subject: lib: bitmap: remove redundant code from __bitmap_shift_right
has been added to the -mm tree. Its filename is
lib-bitmap-remove-redundant-code-from-__bitmap_shift_right.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/lib-bitmap-remove-redundant-code-from-__bitmap_shift_right.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/lib-bitmap-remove-redundant-code-from-__bitmap_shift_right.patch
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------------------------------------------------------
From: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Subject: lib: bitmap: remove redundant code from __bitmap_shift_right
If the condition k==lim-1 is true, we must have off == 0 (otherwise, k
could never become that big). But in that case we have upper == 0 and
hence dst[k] == (src[k] & mask) >> rem. Since mask consists of a
consecutive range of bits starting from the LSB, anding dst[k] with mask
is a no-op.
Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/bitmap.c | 2 --
1 file changed, 2 deletions(-)
diff -puN lib/bitmap.c~lib-bitmap-remove-redundant-code-from-__bitmap_shift_right lib/bitmap.c
--- a/lib/bitmap.c~lib-bitmap-remove-redundant-code-from-__bitmap_shift_right
+++ a/lib/bitmap.c
@@ -136,8 +136,6 @@ void __bitmap_shift_right(unsigned long
lower &= mask;
lower >>= rem;
dst[k] = lower | upper;
- if (left && k == lim - 1)
- dst[k] &= mask;
}
if (off)
memset(&dst[lim - off], 0, off*sizeof(unsigned long));
_
Patches currently in -mm which might be from linux@xxxxxxxxxxxxxxxxxx are
lib-string_get_size-remove-redundant-prefixes.patch
lib-string_get_size-use-32-bit-arithmetic-when-possible.patch
lib-string_get_size-return-void.patch
lib-bitmap-more-signed-unsigned-conversions.patch
linux-nodemaskh-update-bitmap-wrappers-to-take-unsigned-int.patch
linux-cpumaskh-update-bitmap-wrappers-to-take-unsigned-int.patch
lib-bitmap-update-bitmap_onto-to-unsigned.patch
lib-bitmap-update-bitmap_onto-to-unsigned-checkpatch-fixes.patch
lib-bitmap-change-parameters-of-bitmap_fold-to-unsigned.patch
lib-bitmap-simplify-bitmap_pos_to_ord.patch
lib-bitmap-simplify-bitmap_ord_to_pos.patch
lib-bitmap-make-the-bits-parameter-of-bitmap_remap-unsigned.patch
lib-remove-strnicmp.patch
lib-interval_treec-simplify-includes.patch
lib-sortc-use-simpler-includes.patch
lib-dynamic_queue_limitsc-simplify-includes.patch
lib-halfmd4c-simplify-includes.patch
lib-idrc-remove-redundant-include.patch
lib-genallocc-remove-redundant-include.patch
lib-list_sortc-rearrange-includes.patch
lib-md5c-simplify-include.patch
lib-llistc-remove-redundant-include.patch
lib-kobject_ueventc-remove-redundant-include.patch
lib-nlattrc-remove-redundant-include.patch
lib-plistc-remove-redundant-include.patch
lib-radix-treec-change-to-simpler-include.patch
lib-show_memc-remove-redundant-include.patch
lib-sortc-move-include-inside-if-0.patch
lib-stmp_devicec-replace-moduleh-include.patch
lib-strncpy_from_userc-replace-moduleh-include.patch
lib-percpu_idac-remove-redundant-includes.patch
lib-lcmc-replace-include.patch
lib-bitmapc-change-prototype-of-bitmap_copy_le.patch
lib-bitmapc-elide-bitmap_copy_le-on-little-endian.patch
lib-bitmap-change-bitmap_shift_right-to-take-unsigned-parameters.patch
lib-bitmap-eliminate-branch-in-__bitmap_shift_right.patch
lib-bitmap-remove-redundant-code-from-__bitmap_shift_right.patch
lib-bitmap-yet-another-simplification-in-__bitmap_shift_right.patch
lib-bitmap-change-bitmap_shift_left-to-take-unsigned-parameters.patch
lib-bitmap-eliminate-branch-in-__bitmap_shift_left.patch
lib-bitmap-remove-redundant-code-from-__bitmap_shift_left.patch
checkpatch-emit-an-error-when-using-predefined-timestamp-macros.patch
linux-next.patch
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