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| author | Shuah Khan <skhan@linuxfoundation.org> | 2021-09-15 15:28:09 -0600 |
|---|---|---|
| committer | Shuah Khan <skhan@linuxfoundation.org> | 2021-09-16 12:57:32 -0600 |
| commit | f5013d412a43662b63f3d5f3a804d63213acd471 (patch) | |
| tree | cd6b79ce26d28638a70a74f88776d346f0616a2b /tools/testing/selftests/kvm/lib | |
| parent | 20175d5eac5bb94a7a3719ef275337fc9abf26ac (diff) | |
selftests: kvm: fix get_run_delay() ignoring fscanf() return warn
Fix get_run_delay() to check fscanf() return value to get rid of the
following warning. When fscanf() fails return MIN_RUN_DELAY_NS from
get_run_delay(). Move MIN_RUN_DELAY_NS from steal_time.c to test_util.h
so get_run_delay() and steal_time.c can use it.
lib/test_util.c: In function ‘get_run_delay’:
lib/test_util.c:316:2: warning: ignoring return value of ‘fscanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
316 | fscanf(fp, "%ld %ld ", &val[0], &val[1]);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools/testing/selftests/kvm/lib')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/test_util.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c index f80dd38a38b2..a9107bfae402 100644 --- a/tools/testing/selftests/kvm/lib/test_util.c +++ b/tools/testing/selftests/kvm/lib/test_util.c @@ -313,7 +313,9 @@ long get_run_delay(void) sprintf(path, "/proc/%ld/schedstat", syscall(SYS_gettid)); fp = fopen(path, "r"); - fscanf(fp, "%ld %ld ", &val[0], &val[1]); + /* Return MIN_RUN_DELAY_NS upon failure just to be safe */ + if (fscanf(fp, "%ld %ld ", &val[0], &val[1]) < 2) + val[1] = MIN_RUN_DELAY_NS; fclose(fp); return val[1]; |