perf env: Do not return pointers to local variables

[linux-2.6-microblaze.git] / tools / perf / util / env.c

diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index 6242a92..4154f94 100644 (file)
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -343,11 +343,11 @@ static const char *normalize_arch(char *arch)
 
 const char *perf_env__arch(struct perf_env *env)
 {
-       struct utsname uts;
        char *arch_name;
 
        if (!env || !env->arch) { /* Assume local operation */
-               if (uname(&uts) < 0)
+               static struct utsname uts = { .machine[0] = '\0', };
+               if (uts.machine[0] == '\0' && uname(&uts) < 0)
                        return NULL;
                arch_name = uts.machine;
        } else