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-rw-r--r--tools/testing/selftests/bpf/cgroup_helpers.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/cgroup_helpers.c b/tools/testing/selftests/bpf/cgroup_helpers.c
index 0d89f0396be4..e95c33e333a4 100644
--- a/tools/testing/selftests/bpf/cgroup_helpers.c
+++ b/tools/testing/selftests/bpf/cgroup_helpers.c
@@ -47,7 +47,7 @@ int enable_all_controllers(char *cgroup_path)
char buf[PATH_MAX];
char *c, *c2;
int fd, cfd;
- size_t len;
+ ssize_t len;
snprintf(path, sizeof(path), "%s/cgroup.controllers", cgroup_path);
fd = open(path, O_RDONLY);