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authorArnaldo Carvalho de Melo <acme@redhat.com>2014-12-15 21:07:24 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-12-17 17:09:34 +0300
commit2dc0b9721956f4314364f68a99d8bef490870438 (patch)
tree9454874134eb4f25a08874d0371493f0b314997f /tools
parent8185e881f9fd9a2fa01f9d45616f8587f485f2a6 (diff)
downloadlinux-2dc0b9721956f4314364f68a99d8bef490870438.tar.xz
tools: Move __ffs implementation to tools/include/asm-generic/bitops/__ffs.h
To match the Linux kernel source code structure from where this code came from. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-gubysnp4a8hd98lxoeruak13@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/include/asm-generic/bitops/__ffs.h43
-rw-r--r--tools/perf/MANIFEST1
-rw-r--r--tools/perf/Makefile.perf1
-rw-r--r--tools/perf/util/include/linux/bitops.h37
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;