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lib: bitmap: yet another simplification in __bitmap_shift_right
authorRasmus Villemoes <linux@rasmusvillemoes.dk>
Fri, 13 Feb 2015 22:36:10 +0000 (14:36 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 14 Feb 2015 05:21:35 +0000 (21:21 -0800)
commit7443bd1cd4d5d716ebfb2c4f56e8e12b87adadd0
tree8f5d99e331fbd14fedaff8b58625ee4fd5e8190atree | snapshot
parent0b605ee15c57c2ba752e11e1c230fa96dd9c55bdcommit | diff
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@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lib/bitmap.c diff | blob | history
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