From: Thomas Richter <tmricht@linux.ibm.com>
To: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
acme@kernel.org
Cc: svens@linux.ibm.com, gor@linux.ibm.com, sumanthk@linux.ibm.com,
hca@linux.ibm.com, Thomas Richter <tmricht@linux.ibm.com>
Subject: [PATCH] perf/s390: Compiler error on s390 for bench/numa.c
Date: Thu, 19 May 2022 10:55:30 +0200 [thread overview]
Message-ID: <20220519085530.999726-1-tmricht@linux.ibm.com> (raw)
The compilation on s390 results in this error:
# make DEBUG=y bench/numa.o
...
bench/numa.c: In function ‘__bench_numa’:
bench/numa.c:1749:81: error: ‘%d’ directive output may be truncated
writing between 1 and 11 bytes into a region of size between
10 and 20 [-Werror=format-truncation=]
1749 | snprintf(tname, sizeof(tname), "process%d:thread%d", p, t);
^~
...
bench/numa.c:1749:64: note: directive argument in the range
[-2147483647, 2147483646]
...
#
The maximum length of the %d replacement is 11 characters because
of the negative sign. Therefore use %u as format conversion.
Output after:
# make DEBUG=y bench/numa.o > /dev/null 2>&1; ll bench/numa.o
-rw-r--r-- 1 root root 418320 May 19 09:11 bench/numa.o
#
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
---
tools/perf/bench/numa.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/bench/numa.c b/tools/perf/bench/numa.c
index d5289fa58a4f..ff0bfd87afbb 100644
--- a/tools/perf/bench/numa.c
+++ b/tools/perf/bench/numa.c
@@ -1746,7 +1746,7 @@ static int __bench_numa(const char *name)
for (t = 0; t < g->p.nr_threads; t++) {
memset(tname, 0, sizeof(tname));
td = g->threads + p*g->p.nr_threads + t;
- snprintf(tname, sizeof(tname), "process%d:thread%d", p, t);
+ snprintf(tname, sizeof(tname), "process%u:thread%u", p, t);
print_res(tname, td->speed_gbs,
"GB/sec", "thread-speed", "GB/sec/thread speed");
print_res(tname, td->system_time_ns / NSEC_PER_SEC,
--
2.36.1
next reply other threads:[~2022-05-19 8:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-19 8:55 Thomas Richter [this message]
2022-05-19 21:45 ` [PATCH] perf/s390: Compiler error on s390 for bench/numa.c Namhyung Kim
2022-05-20 6:55 ` Thomas Richter
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