diff options
| author | Jiri Olsa <jolsa@kernel.org> | 2014-10-26 23:44:03 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-11-06 17:42:13 -0300 |
| commit | 416c419cc3799ddf7ea467c9adcb4cd038bd94a4 (patch) | |
| tree | b28e3aa0ab1b163db862e52304831dff483bfca7 /tools/perf/util/include/linux/bitops.h | |
| parent | 96d78059d6d9da45d77078a219924304860497f2 (diff) | |
perf tools: Add test_and_set_bit function
Set a bit and return its old value. Stolen from kernel sources, will be
used in next patches.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Namhyung Kim <namhyung@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1414363445-22370-1-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/include/linux/bitops.h')
| -rw-r--r-- | tools/perf/util/include/linux/bitops.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/include/linux/bitops.h b/tools/perf/util/include/linux/bitops.h index dadfa7e5428..c3294163de1 100644 --- a/tools/perf/util/include/linux/bitops.h +++ b/tools/perf/util/include/linux/bitops.h @@ -15,6 +15,8 @@ #define BITS_TO_U64(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u64)) #define BITS_TO_U32(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(u32)) #define BITS_TO_BYTES(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE) +#define BIT_WORD(nr) ((nr) / BITS_PER_LONG) +#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG)) #define for_each_set_bit(bit, addr, size) \ for ((bit) = find_first_bit((addr), (size)); \ |