[03/10] lib/bitmap: change type of bitmap_weight to unsigned long

Commit Message

Yury Norov July 6, 2022, 5:42 p.m. UTC

bitmap_weight() doesn't return negative values, so change it's type
to unsigned long. It may help compiler to generate better code and
catch bugs.

Signed-off-by: Yury Norov <[e-mail]>
---
 include/linux/bitmap.h       | 5 +++--
 lib/bitmap.c                 | 5 ++---
 tools/include/linux/bitmap.h | 4 ++--
 tools/lib/bitmap.c           | 4 ++--
 4 files changed, 9 insertions(+), 9 deletions(-)

Patch

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 85aace699b2b..a92149f415d2 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -163,7 +163,7 @@  bool __bitmap_intersects(const unsigned long *bitmap1,
 			 const unsigned long *bitmap2, unsigned int nbits);
 bool __bitmap_subset(const unsigned long *bitmap1,
 		     const unsigned long *bitmap2, unsigned int nbits);
-int __bitmap_weight(const unsigned long *bitmap, unsigned int nbits);
+unsigned long __bitmap_weight(const unsigned long *bitmap, unsigned int nbits);
 void __bitmap_set(unsigned long *map, unsigned int start, int len);
 void __bitmap_clear(unsigned long *map, unsigned int start, int len);
 
@@ -419,7 +419,8 @@  static inline bool bitmap_full(const unsigned long *src, unsigned int nbits)
 	return find_first_zero_bit(src, nbits) == nbits;
 }
 
-static __always_inline int bitmap_weight(const unsigned long *src, unsigned int nbits)
+static __always_inline
+unsigned long bitmap_weight(const unsigned long *src, unsigned int nbits)
 {
 	if (small_const_nbits(nbits))
 		return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 098fd9db2363..b580b381eca1 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -333,10 +333,9 @@  bool __bitmap_subset(const unsigned long *bitmap1,
 }
 EXPORT_SYMBOL(__bitmap_subset);
 
-int __bitmap_weight(const unsigned long *bitmap, unsigned int bits)
+unsigned long __bitmap_weight(const unsigned long *bitmap, unsigned int bits)
 {
-	unsigned int k, lim = bits/BITS_PER_LONG;
-	int w = 0;
+	unsigned long k, w = 0, lim = bits/BITS_PER_LONG;
 
 	for (k = 0; k < lim; k++)
 		w += hweight_long(bitmap[k]);
diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h
index 2ae7ab8ed7d1..ae1852e39142 100644
--- a/tools/include/linux/bitmap.h
+++ b/tools/include/linux/bitmap.h
@@ -11,7 +11,7 @@ 
 #define DECLARE_BITMAP(name,bits) \
 	unsigned long name[BITS_TO_LONGS(bits)]
 
-int __bitmap_weight(const unsigned long *bitmap, int bits);
+unsigned long __bitmap_weight(const unsigned long *bitmap, unsigned int bits);
 void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
 		 const unsigned long *bitmap2, int bits);
 bool __bitmap_and(unsigned long *dst, const unsigned long *bitmap1,
@@ -61,7 +61,7 @@  static inline bool bitmap_full(const unsigned long *src, unsigned int nbits)
 	return find_first_zero_bit(src, nbits) == nbits;
 }
 
-static inline int bitmap_weight(const unsigned long *src, unsigned int nbits)
+static inline unsigned long bitmap_weight(const unsigned long *src, unsigned int nbits)
 {
 	if (small_const_nbits(nbits))
 		return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
diff --git a/tools/lib/bitmap.c b/tools/lib/bitmap.c
index 2e351d63fdba..e1fafc131a49 100644
--- a/tools/lib/bitmap.c
+++ b/tools/lib/bitmap.c
@@ -5,9 +5,9 @@ 
  */
 #include <linux/bitmap.h>
 
-int __bitmap_weight(const unsigned long *bitmap, int bits)
+unsigned long __bitmap_weight(const unsigned long *bitmap, unsigned int bits)
 {
-	int k, w = 0, lim = bits/BITS_PER_LONG;
+	unsigned long k, w = 0, lim = bits/BITS_PER_LONG;
 
 	for (k = 0; k < lim; k++)
 		w += hweight_long(bitmap[k]);