[PATCH 03/12] tools: sync BITMAP_LAST_WORD_MASK() macro with the kernel
From: Yury Norov <yury.norov@gmail.com>
Date: 2021-03-21 21:56:12
Also in:
linux-arch, linux-m68k, lkml
Subsystem:
bitmap api, the rest · Maintainers:
Yury Norov, Linus Torvalds
Kernel version generates better code. Signed-off-by: Yury Norov <yury.norov@gmail.com> --- tools/include/linux/bitmap.h | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h
index 7cbd23e56d48..4aabc23ec747 100644
--- a/tools/include/linux/bitmap.h
+++ b/tools/include/linux/bitmap.h@@ -20,12 +20,7 @@ int __bitmap_equal(const unsigned long *bitmap1, void bitmap_clear(unsigned long *map, unsigned int start, int len); #define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1))) - -#define BITMAP_LAST_WORD_MASK(nbits) \ -( \ - ((nbits) % BITS_PER_LONG) ? \ - (1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL \ -) +#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)
--
2.25.1