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 <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 3d3fd6b..bc7e520 100644 (file)
--- 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 3789110..9859f38 100644 (file)
--- 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;