selftests: vDSO: skip getrandom test if architecture is unsupported

If the getrandom test compiles for an arch, don't exit fatally if the
actual cpu it's running on is unsupported.

Suggested-by: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

diff --git a/tools/testing/selftests/vDSO/vdso_test_getrandom.c b/tools/testing/selftests/vDSO/vdso_test_getrandom.c
index 20bbef992c4860be0031e61cd9dde66eec2b4c08..5db8ac8999cd021c544499030cc1b4f8c2a9a3f0 100644 (file)
--- a/tools/testing/selftests/vDSO/vdso_test_getrandom.c
+++ b/tools/testing/selftests/vDSO/vdso_test_getrandom.c
@@ -104,6 +104,7 @@ static void vgetrandom_init(void)
        const char *version = versions[VDSO_VERSION];
        const char *name = names[VDSO_NAMES][6];
        unsigned long sysinfo_ehdr = getauxval(AT_SYSINFO_EHDR);
+       size_t ret;
 
        if (!sysinfo_ehdr) {
                printf("AT_SYSINFO_EHDR is not present!\n");
@@ -115,7 +116,11 @@ static void vgetrandom_init(void)
                printf("%s is missing!\n", name);
                exit(KSFT_FAIL);
        }
-       if (vgrnd.fn(NULL, 0, 0, &vgrnd.params, ~0UL) != 0) {
+       ret = vgrnd.fn(NULL, 0, 0, &vgrnd.params, ~0UL);
+       if (ret == -ENOSYS) {
+               printf("unsupported architecture\n");
+               exit(KSFT_SKIP);
+       } else if (ret) {
                printf("failed to fetch vgetrandom params!\n");
                exit(KSFT_FAIL);
        }