From 91585846f105ef2e3f479a5124a264ebb770f6ab Mon Sep 17 00:00:00 2001 From: James Clark Date: Thu, 26 Nov 2020 16:13:18 +0200 Subject: [PATCH] perf cpumap: Use existing allocator to avoid using malloc Use the existing allocator for perf_cpu_map to avoid use of raw malloc. This could cause an issue in later commits where the size of perf_cpu_map is changed. No functional changes. Signed-off-by: James Clark Acked-by: Namhyung Kim Acked-by: Jiri Olsa Tested-by: Arnaldo Carvalho de Melo Tested-by: John Garry Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Mark Rutland Cc: Peter Zijlstra Cc: Thomas Richter Link: https://lore.kernel.org/r/20201126141328.6509-3-james.clark@arm.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/cpumap.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c index dc5c5e6fc502..20e3a75953fc 100644 --- a/tools/perf/util/cpumap.c +++ b/tools/perf/util/cpumap.c @@ -132,15 +132,16 @@ int cpu_map__build_map(struct perf_cpu_map *cpus, struct perf_cpu_map **res, int (*f)(struct perf_cpu_map *map, int cpu, void *data), void *data) { - struct perf_cpu_map *c; int nr = cpus->nr; + struct perf_cpu_map *c = perf_cpu_map__empty_new(nr); int cpu, s1, s2; - /* allocate as much as possible */ - c = calloc(1, sizeof(*c) + nr * sizeof(int)); if (!c) return -1; + /* Reset size as it may only be partially filled */ + c->nr = 0; + for (cpu = 0; cpu < nr; cpu++) { s1 = f(cpus, cpu, data); for (s2 = 0; s2 < c->nr; s2++) { @@ -155,7 +156,6 @@ int cpu_map__build_map(struct perf_cpu_map *cpus, struct perf_cpu_map **res, /* ensure we process id in increasing order */ qsort(c->map, c->nr, sizeof(int), cmp_ids); - refcount_set(&c->refcnt, 1); *res = c; return 0; } -- 2.20.1