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-rw-r--r--tools/testing/selftests/sched_ext/util.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/testing/selftests/sched_ext/util.c b/tools/testing/selftests/sched_ext/util.c
index e47769c91918..2111329ed289 100644
--- a/tools/testing/selftests/sched_ext/util.c
+++ b/tools/testing/selftests/sched_ext/util.c
@@ -60,11 +60,11 @@ int file_write_long(const char *path, long val)
char buf[64];
int ret;
- ret = sprintf(buf, "%lu", val);
+ ret = sprintf(buf, "%ld", val);
if (ret < 0)
return ret;
- if (write_text(path, buf, sizeof(buf)) <= 0)
+ if (write_text(path, buf, ret) <= 0)
return -1;
return 0;