diff options
| -rw-r--r-- | tools/include/asm-generic/bitops/__ffs.h | 43 | ||||
| -rw-r--r-- | tools/perf/MANIFEST | 1 | ||||
| -rw-r--r-- | tools/perf/Makefile.perf | 1 | ||||
| -rw-r--r-- | tools/perf/util/include/linux/bitops.h | 37 |
4 files changed, 46 insertions, 36 deletions
diff --git a/tools/include/asm-generic/bitops/__ffs.h b/tools/include/asm-generic/bitops/__ffs.h new file mode 100644 index 000000000000..c94175015a82 --- /dev/null +++ b/tools/include/asm-generic/bitops/__ffs.h @@ -0,0 +1,43 @@ +#ifndef _TOOLS_LINUX_ASM_GENERIC_BITOPS___FFS_H_ +#define _TOOLS_LINUX_ASM_GENERIC_BITOPS___FFS_H_ + +#include <asm/types.h> + +/** + * __ffs - find first bit in word. + * @word: The word to search + * + * Undefined if no bit exists, so code should check against 0 first. + */ +static __always_inline unsigned long __ffs(unsigned long word) +{ + int num = 0; + +#if __BITS_PER_LONG == 64 + if ((word & 0xffffffff) == 0) { + num += 32; + word >>= 32; + } +#endif + if ((word & 0xffff) == 0) { + num += 16; + word >>= 16; + } + if ((word & 0xff) == 0) { + num += 8; + word >>= 8; + } + if ((word & 0xf) == 0) { + num += 4; + word >>= 4; + } + if ((word & 0x3) == 0) { + num += 2; + word >>= 2; + } + if ((word & 0x1) == 0) + num += 1; + return num; +} + +#endif /* _TOOLS_LINUX_ASM_GENERIC_BITOPS___FFS_H_ */ diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST index 344c4d3d0a4a..39c08636357b 100644 --- a/tools/perf/MANIFEST +++ b/tools/perf/MANIFEST @@ -5,6 +5,7 @@ tools/lib/api tools/lib/symbol/kallsyms.c tools/lib/symbol/kallsyms.h tools/include/asm/bug.h +tools/include/asm-generic/bitops/__ffs.h tools/include/linux/compiler.h tools/include/linux/hash.h tools/include/linux/export.h diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index 763e68fb5767..dbf8ca6c13cd 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -232,6 +232,7 @@ LIB_H += ../include/linux/hash.h LIB_H += ../../include/linux/stringify.h LIB_H += util/include/linux/bitmap.h LIB_H += util/include/linux/bitops.h +LIB_H += ../include/asm-generic/bitops/__ffs.h LIB_H += ../include/linux/compiler.h LIB_H += util/include/linux/const.h LIB_H += util/include/linux/ctype.h diff --git a/tools/perf/util/include/linux/bitops.h b/tools/perf/util/include/linux/bitops.h index c3294163de17..762bb83333c0 100644 --- a/tools/perf/util/include/linux/bitops.h +++ b/tools/perf/util/include/linux/bitops.h @@ -52,42 +52,7 @@ static inline unsigned long hweight_long(unsigned long w) #define BITOP_WORD(nr) ((nr) / BITS_PER_LONG) -/** - * __ffs - find first bit in word. - * @word: The word to search - * - * Undefined if no bit exists, so code should check against 0 first. - */ -static __always_inline unsigned long __ffs(unsigned long word) -{ - int num = 0; - -#if BITS_PER_LONG == 64 - if ((word & 0xffffffff) == 0) { - num += 32; - word >>= 32; - } -#endif - if ((word & 0xffff) == 0) { - num += 16; - word >>= 16; - } - if ((word & 0xff) == 0) { - num += 8; - word >>= 8; - } - if ((word & 0xf) == 0) { - num += 4; - word >>= 4; - } - if ((word & 0x3) == 0) { - num += 2; - word >>= 2; - } - if ((word & 0x1) == 0) - num += 1; - return num; -} +#include <asm-generic/bitops/__ffs.h> typedef const unsigned long __attribute__((__may_alias__)) long_alias_t; |