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author | 2021-08-21 11:19:10 +0200 | |
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committer | 2021-10-08 11:42:17 -0300 | |
commit | 6bd006c6eb7fdadbe36de84377af4447da4ffabb (patch) | |
tree | e0693b553f0975ff630d583edc21692103d776cf /tools/perf/util/mmap.c | |
parent | libperf cpumap: Use binary search in perf_cpu_map__idx() as array are sorted (diff) | |
download | linux-6bd006c6eb7fdadbe36de84377af4447da4ffabb.tar.gz linux-6bd006c6eb7fdadbe36de84377af4447da4ffabb.tar.bz2 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/util/mmap.c')
-rw-r--r-- | tools/perf/util/mmap.c | 11 |
1 files changed, 11 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; +} |