kstrtos8
ret = kstrtos8(page, 0, &val);
int __must_check kstrtos8(const char *s, unsigned int base, s8 *res);
EXPORT_SYMBOL(kstrtos8);
kstrto_from_user(kstrtos8_from_user, kstrtos8, s8);
TEST_OK(kstrtos8, s8, "%hhd", test_s8_ok);
TEST_FAIL(kstrtos8, s8, "%hhd", test_s8_fail);