From 8397927c8045c58afc68ef839855eb5505259df3 Mon Sep 17 00:00:00 2001 From: Rasmus Villemoes Date: Wed, 6 Aug 2014 16:09:51 -0700 Subject: [PATCH] lib: bitmap: make nbits parameter of bitmap_full unsigned The compiler can generate slightly smaller and simpler code when it knows that "nbits" is non-negative. Since no-one passes a negative bit-count, this shouldn't affect the semantics. Signed-off-by: Rasmus Villemoes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/bitmap.h | 4 ++-- lib/bitmap.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 3d3fd6b2f157..bc7e520d3f78 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -89,7 +89,7 @@ */ extern int __bitmap_empty(const unsigned long *bitmap, unsigned int nbits); -extern int __bitmap_full(const unsigned long *bitmap, int bits); +extern int __bitmap_full(const unsigned long *bitmap, unsigned int nbits); extern int __bitmap_equal(const unsigned long *bitmap1, const unsigned long *bitmap2, int bits); extern void __bitmap_complement(unsigned long *dst, const unsigned long *src, @@ -265,7 +265,7 @@ static inline int bitmap_empty(const unsigned long *src, unsigned nbits) return __bitmap_empty(src, nbits); } -static inline int bitmap_full(const unsigned long *src, int nbits) +static inline int bitmap_full(const unsigned long *src, unsigned int nbits) { if (small_const_nbits(nbits)) return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits)); diff --git a/lib/bitmap.c b/lib/bitmap.c index 378911001442..9859f38660f9 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -55,9 +55,9 @@ int __bitmap_empty(const unsigned long *bitmap, unsigned int bits) } EXPORT_SYMBOL(__bitmap_empty); -int __bitmap_full(const unsigned long *bitmap, int bits) +int __bitmap_full(const unsigned long *bitmap, unsigned int bits) { - int k, lim = bits/BITS_PER_LONG; + unsigned int k, lim = bits/BITS_PER_LONG; for (k = 0; k < lim; ++k) if (~bitmap[k]) return 0; -- GitLab