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perf cpumap: Use existing allocator to avoid using malloc

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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 <james.clark@arm.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: John Garry <john.garry@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lore.kernel.org/r/20201126141328.6509-3-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
James Clark 2020-11-26 16:13:18 +02:00 committed by Arnaldo Carvalho de Melo
parent 23331eeb73
commit 91585846f1
1 changed files with 4 additions and 4 deletions
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8
tools/perf/util/cpumap.c
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@ -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;
}