Commit a719101f authored by Yury Norov's avatar Yury Norov Committed by Linus Torvalds
Browse files

tools: sync BITMAP_LAST_WORD_MASK() macro with the kernel 

Kernel version generates better code.

Link: https://lkml.kernel.org/r/20210401003153.97325-4-yury.norov@gmail.com


Signed-off-by: default avatarYury Norov <yury.norov@gmail.com>
Acked-by: default avatarRasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Alexey Klimov <aklimov@redhat.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: David Sterba <dsterba@suse.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Jianpeng Ma <jianpeng.ma@intel.com>
Cc: Joe Perches <joe@perches.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Rich Felker <dalias@libc.org>
Cc: Stefano Brivio <sbrivio@redhat.com>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Yoshinori Sato <ysato@users.osdn.me>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e5b9252d

tools/include/linux/bitmap.h

+1 −6
Original line number Diff line number Diff line
@@ -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)