Import this function from Linux.
Signed-off-by: Caleb Connolly caleb.connolly@linaro.org --- include/linux/bitmap.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 0a8503af9f14..40ca2212cb40 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -195,8 +195,16 @@ static inline void bitmap_fill(unsigned long *dst, unsigned int nbits) memset(dst, 0xff, len); } }
+static inline bool bitmap_empty(const unsigned long *src, unsigned int nbits) +{ + if (small_const_nbits(nbits)) + return !(*src & BITMAP_LAST_WORD_MASK(nbits)); + + return find_first_bit(src, nbits) == nbits; +} + static inline void bitmap_or(unsigned long *dst, const unsigned long *src1, const unsigned long *src2, unsigned int nbits) { if (small_const_nbits(nbits))