lib: bitmap: make nbits parameter of bitmap_subset 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 <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 2f3f3a4d5996..87e88f79def1 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -109,7 +109,7 @@ extern int __bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1,
 extern int __bitmap_intersects(const unsigned long *bitmap1,
                         const unsigned long *bitmap2, unsigned int nbits);
 extern int __bitmap_subset(const unsigned long *bitmap1,
-                        const unsigned long *bitmap2, int bits);
+                        const unsigned long *bitmap2, unsigned int nbits);
 extern int __bitmap_weight(const unsigned long *bitmap, int bits);
 
 extern void bitmap_set(unsigned long *map, int i, int len);
@@ -249,7 +249,7 @@ static inline int bitmap_intersects(const unsigned long *src1,
 }
 
 static inline int bitmap_subset(const unsigned long *src1,
-                        const unsigned long *src2, int nbits)
+                        const unsigned long *src2, unsigned int nbits)
 {
         if (small_const_nbits(nbits))
                 return ! ((*src1 & ~(*src2)) & BITMAP_LAST_WORD_MASK(nbits));