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| author | Kan Liang <kan.liang@intel.com> | 2018-01-18 13:26:19 -0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-02-15 09:52:22 -0300 |
| commit | 8872481bd04850b19e053dc579de5a11b83b16fc (patch) | |
| tree | 1ab57d0e91aca3240df33aa3c2ac528df68804f2 /tools/perf/util/mmap.h | |
| parent | f92c8cbe597a5a2ccec702dff824f3fe0f3623eb (diff) | |
| download | linux-stable-8872481bd04850b19e053dc579de5a11b83b16fc.tar.gz linux-stable-8872481bd04850b19e053dc579de5a11b83b16fc.tar.bz2 linux-stable-8872481bd04850b19e053dc579de5a11b83b16fc.zip | |
perf mmap: Introduce perf_mmap__read_init()
The new function perf_mmap__read_init() is factored out from
perf_mmap__push().
It is to calculate the 'start' and 'end' of the available data in
ringbuffer.
No functional change.
Signed-off-by: Kan Liang <kan.liang@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1516310792-208685-5-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/mmap.h')
| -rw-r--r-- | tools/perf/util/mmap.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h index e43d7b55a55f..9ab2b48df65b 100644 --- a/tools/perf/util/mmap.h +++ b/tools/perf/util/mmap.h @@ -94,4 +94,6 @@ int perf_mmap__push(struct perf_mmap *md, bool backward, size_t perf_mmap__mmap_len(struct perf_mmap *map); +int perf_mmap__read_init(struct perf_mmap *md, bool overwrite, + u64 *startp, u64 *endp); #endif /*__PERF_MMAP_H */ |