lib/bitmap.c: bitmap_[empty,full]: remove code duplication

[firefly-linux-kernel-4.4.55.git] / include / linux / bitmap.h

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index dbfbf4990005904ebfc4c1cd1a02a0914f2f4180..ea17cca9e6852f982b1f98a5a06f863de7324e61 100644 (file)
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -172,12 +172,8 @@ extern unsigned int bitmap_ord_to_pos(const unsigned long *bitmap, unsigned int
 extern int bitmap_print_to_pagebuf(bool list, char *buf,
                                   const unsigned long *maskp, int nmaskbits);
 
-#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) % BITS_PER_LONG))
-#define BITMAP_LAST_WORD_MASK(nbits)                                   \
-(                                                                      \
-       ((nbits) % BITS_PER_LONG) ?                                     \
-               (1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL               \
-)
+#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
+#define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - 1)))
 
 #define small_const_nbits(nbits) \
        (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG)
@@ -287,16 +283,16 @@ static inline int bitmap_empty(const unsigned long *src, unsigned nbits)
 {
        if (small_const_nbits(nbits))
                return ! (*src & BITMAP_LAST_WORD_MASK(nbits));
-       else
-               return __bitmap_empty(src, nbits);
+
+       return find_first_bit(src, nbits) == 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));
-       else
-               return __bitmap_full(src, nbits);
+
+       return find_first_zero_bit(src, nbits) == nbits;
 }
 
 static inline int bitmap_weight(const unsigned long *src, unsigned int nbits)