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| author | Riccardo Mancini <rickyman7@gmail.com> | 2021-08-21 11:19:10 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-10-08 16:42:17 +0200 |
| commit | 6bd006c6eb7fdadbe36de84377af4447da4ffabb (patch) | |
| tree | e0693b553f0975ff630d583edc21692103d776cf /tools/perf | |
| parent | libperf cpumap: Use binary search in perf_cpu_map__idx() as array are sorted (diff) | |
| download | linux-6bd006c6eb7fdadbe36de84377af4447da4ffabb.tar.xz linux-6bd006c6eb7fdadbe36de84377af4447da4ffabb.zip | |
perf mmap: Introduce mmap_cpu_mask__duplicate()
This patch adds a new function in util/mmap.c to duplicate a mmap_cpu_mask.
This new function will be used in patches in the workqueue patchkit.
Signed-off-by: Riccardo Mancini <rickyman7@gmail.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/8943a548ef7a3dd3e015095afad7e9a8b2154c05.1629490974.git.rickyman7@gmail.com
[ bitmap_alloc() was renamed to bitmap_zalloc() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/mmap.c | 11 | ||||
| -rw-r--r-- | tools/perf/util/mmap.h | 3 |
2 files changed, 14 insertions, 0 deletions
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c index 512dc8b9c168..23ecdba9e670 100644 --- a/tools/perf/util/mmap.c +++ b/tools/perf/util/mmap.c @@ -350,3 +350,14 @@ int perf_mmap__push(struct mmap *md, void *to, out: return rc; } + +int mmap_cpu_mask__duplicate(struct mmap_cpu_mask *original, struct mmap_cpu_mask *clone) +{ + clone->nbits = original->nbits; + clone->bits = bitmap_zalloc(original->nbits); + if (!clone->bits) + return -ENOMEM; + + memcpy(clone->bits, original->bits, MMAP_CPU_MASK_BYTES(original)); + return 0; +} diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h index af33118354dd..8e259b9610f8 100644 --- a/tools/perf/util/mmap.h +++ b/tools/perf/util/mmap.h @@ -64,4 +64,7 @@ size_t mmap__mmap_len(struct mmap *map); void mmap_cpu_mask__scnprintf(struct mmap_cpu_mask *mask, const char *tag); +int mmap_cpu_mask__duplicate(struct mmap_cpu_mask *original, + struct mmap_cpu_mask *clone); + #endif /*__PERF_MMAP_H */ |