perf tools: Fix calloc() arguments to address error introduced in gcc-14

the definition of calloc is as follows:

    void *calloc(size_t nmemb, size_t size);

number of members is in the first parameter and the size is in the
second parameter.

Fix error messages on gcc 14 20240102:

  error: 'calloc' sizes specified with 'sizeof' in the earlier argument and
  not in the later argument [-Werror=calloc-transposed-args]

Committer notes:

I noticed this on fedora 40 and rawhide.

Signed-off-by: Sun Haiyong <sunhaiyong@loongson.cn>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240106094129.3337057-1-siyanteng@loongson.cn
Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index 3712186353fb..2a0289c14959 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -1055,11 +1055,11 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
 	if (thread_nr > n)
 		thread_nr = n;
 
-	synthesize_threads = calloc(sizeof(pthread_t), thread_nr);
+	synthesize_threads = calloc(thread_nr, sizeof(pthread_t));
 	if (synthesize_threads == NULL)
 		goto free_dirent;
 
-	args = calloc(sizeof(*args), thread_nr);
+	args = calloc(thread_nr, sizeof(*args));
 	if (args == NULL)
 		goto free_threads;