| Message ID | 20210709063741.355325-2-chenlifu@huawei.com |
|---|---|
| State | New |
| Headers | show |
| Series | [-next,1/2] selftests: Fix vm_handle_exception undefined error | expand |
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c index af1031fed97f..02ed0d5c3aa5 100644 --- a/tools/testing/selftests/kvm/lib/test_util.c +++ b/tools/testing/selftests/kvm/lib/test_util.c @@ -135,7 +135,8 @@ size_t get_trans_hugepagesz(void) f = fopen("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size", "r"); TEST_ASSERT(f != NULL, "Error in opening transparent_hugepage/hpage_pmd_size"); - fscanf(f, "%ld", &size); + if (fscanf(f, "%ld", &size) != 1) + size = 0; fclose(f); return size; diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c index b0031f2d38fd..18f231c45a12 100644 --- a/tools/testing/selftests/kvm/steal_time.c +++ b/tools/testing/selftests/kvm/steal_time.c @@ -225,7 +225,8 @@ static 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]); + if (fscanf(fp, "%ld %ld ", &val[0], &val[1]) != 2) + val[1] = 0; fclose(fp); return val[1]; diff --git a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c index e6480fd5c4bd..e770037e5cc9 100644 --- a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c +++ b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c @@ -82,7 +82,8 @@ int get_warnings_count(void) FILE *f; f = popen("dmesg | grep \"WARNING:\" | wc -l", "r"); - fscanf(f, "%d", &warnings); + if (fscanf(f, "%d", &warnings) != 1) + warnings = 0; fclose(f); return warnings; diff --git a/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c b/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c index 117bf49a3d79..6efda86083f1 100644 --- a/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c +++ b/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c @@ -106,7 +106,8 @@ static 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]); + if (fscanf(fp, "%ld %ld ", &val[0], &val[1]) != 2) + val[1] = 0; fclose(fp); return val[1];
Compile selftests occurs the following warnings: make -C tools/testing/selftests ... lib/test_util.c: In function ‘get_trans_hugepagesz’: lib/test_util.c:138:2: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] 138 | fscanf(f, "%ld", &size); | ^~~~~~~~~~~~~~~~~~~~~~~ x86_64/mmio_warning_test.c: In function ‘get_warnings_count’: x86_64/mmio_warning_test.c:85:2: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] 85 | fscanf(f, "%d", &warnings); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ x86_64/xen_shinfo_test.c: In function ‘get_run_delay’: x86_64/xen_shinfo_test.c:109:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] 109 | fscanf(fp, "%ld %ld ", &val[0], &val[1]); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ steal_time.c: In function ‘get_run_delay’: steal_time.c:228:2: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] 228 | fscanf(fp, "%ld %ld ", &val[0], &val[1]); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Check the return value of ‘fscanf’ to fix it. Signed-off-by: Chen Lifu <chenlifu@huawei.com> --- tools/testing/selftests/kvm/lib/test_util.c | 3 ++- tools/testing/selftests/kvm/steal_time.c | 3 ++- tools/testing/selftests/kvm/x86_64/mmio_warning_test.c | 3 ++- tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c | 3 ++- 4 files changed, 8 insertions(+), 4 deletions(-)