lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Tue, 16 Dec 2014 13:57:08 -0300 From: Arnaldo Carvalho de Melo <acme@...nel.org> To: Ingo Molnar <mingo@...nel.org> Cc: linux-kernel@...r.kernel.org, Arnaldo Carvalho de Melo <acme@...hat.com>, Adrian Hunter <adrian.hunter@...el.com>, Borislav Petkov <bp@...e.de>, David Ahern <dsahern@...il.com>, Don Zickus <dzickus@...hat.com>, Frederic Weisbecker <fweisbec@...il.com>, Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>, Namhyung Kim <namhyung@...nel.org>, Paul Mackerras <paulus@...ba.org>, Peter Zijlstra <peterz@...radead.org>, Stephane Eranian <eranian@...gle.com> Subject: [PATCH 06/18] tools: Move __ffs implementation to tools/include/asm-generic/bitops/__ffs.h From: Arnaldo Carvalho de Melo <acme@...hat.com> To match the Linux kernel source code structure from where this code came from. Cc: Adrian Hunter <adrian.hunter@...el.com> Cc: Borislav Petkov <bp@...e.de> Cc: David Ahern <dsahern@...il.com> Cc: Don Zickus <dzickus@...hat.com> Cc: Frederic Weisbecker <fweisbec@...il.com> Cc: Jiri Olsa <jolsa@...hat.com> Cc: Mike Galbraith <efault@....de> Cc: Namhyung Kim <namhyung@...nel.org> Cc: Paul Mackerras <paulus@...ba.org> Cc: Peter Zijlstra <peterz@...radead.org> Cc: Stephane Eranian <eranian@...gle.com> Link: http://lkml.kernel.org/n/tip-gubysnp4a8hd98lxoeruak13@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com> --- tools/include/asm-generic/bitops/__ffs.h | 43 ++++++++++++++++++++++++++++++++ tools/perf/MANIFEST | 1 + tools/perf/Makefile.perf | 1 + tools/perf/util/include/linux/bitops.h | 37 +-------------------------- 4 files changed, 46 insertions(+), 36 deletions(-) create mode 100644 tools/include/asm-generic/bitops/__ffs.h 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..bfd86a32254a 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; -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists