[PATCH 2/9] lib/bitmap: implement bitmap_{empty,full} with bitmap_weight_eq()
From: Yury Norov <yury.norov@gmail.com>
Date: 2021-11-28 03:59:42
Also in:
kvm, linux-mips, linux-mm, linux-perf-users, linux-riscv, linux-s390, linuxppc-dev, lkml
Subsystem:
bitmap api, the rest · Maintainers:
Yury Norov, Linus Torvalds
Now as we have bitmap_weight_eq(), switch bitmap_full() and bitmap_empty() to using it. Signed-off-by: Yury Norov <yury.norov@gmail.com> --- include/linux/bitmap.h | 26 ++++++++++---------------- 1 file changed, 10 insertions(+), 16 deletions(-)
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 996041f771c8..2d951e4dc814 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h@@ -386,22 +386,6 @@ static inline int bitmap_subset(const unsigned long *src1, return __bitmap_subset(src1, src2, nbits); } -static inline bool bitmap_empty(const unsigned long *src, unsigned nbits) -{ - if (small_const_nbits(nbits)) - return ! (*src & BITMAP_LAST_WORD_MASK(nbits)); - - return find_first_bit(src, nbits) == nbits; -} - -static inline bool bitmap_full(const unsigned long *src, unsigned int nbits) -{ - if (small_const_nbits(nbits)) - return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits)); - - return find_first_zero_bit(src, nbits) == nbits; -} - static __always_inline int bitmap_weight(const unsigned long *src, unsigned int nbits) { if (small_const_nbits(nbits))
@@ -436,6 +420,16 @@ static __always_inline bool bitmap_weight_le(const unsigned long *src, return __bitmap_weight_le(src, nbits, num); } +static __always_inline bool bitmap_empty(const unsigned long *src, unsigned int nbits) +{ + return bitmap_weight_eq(src, nbits, 0); +} + +static __always_inline bool bitmap_full(const unsigned long *src, unsigned int nbits) +{ + return bitmap_weight_eq(src, nbits, nbits); +} + static __always_inline void bitmap_set(unsigned long *map, unsigned int start, unsigned int nbits) {
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2.25.1