Hi Peter, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common android12-5.10 head: 1f0c32a6679e6346c36c0f45db674600a9e3060a commit: 606bb053823378adbd12fd8a31af7309250daedb [7529/10575] BACKPORT: FROMGIT: userfaultfd/selftests: unify error handling config: x86_64-rhel-8.3-kselftests (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android12-5.10 git checkout 606bb053823378adbd12fd8a31af7309250daedb # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash -C tools/testing/selftests/vm install If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): userfaultfd.c:345:29: error: unknown type name 'uint64_t'; did you mean 'u_int64_t'? 345 | static int userfaultfd_open(uint64_t *features) | ^~~~~~~~ | u_int64_t userfaultfd.c:366:35: error: unknown type name 'uint64_t'; did you mean 'u_int64_t'? 366 | static int uffd_test_ctx_init_ext(uint64_t *features) | ^~~~~~~~ | u_int64_t userfaultfd.c:411:38: error: unknown type name 'uint64_t'; did you mean 'u_int64_t'? 411 | static inline int uffd_test_ctx_init(uint64_t features) | ^~~~~~~~ | u_int64_t userfaultfd.c: In function 'wp_range': userfaultfd.c:480:37: error: expected ')' before 'PRIx64' 480 | err("clear WP failed: address=0x%"PRIx64, (uint64_t)start); | ^~~~~~ userfaultfd.c:146:29: note: in definition of macro '_err' 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~ userfaultfd.c:480:3: note: in expansion of macro 'err' 480 | err("clear WP failed: address=0x%"PRIx64, (uint64_t)start); | ^~~ userfaultfd.c:146:19: warning: spurious trailing '%' in format [-Wformat=] 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~~~~~~~ userfaultfd.c:153:3: note: in expansion of macro '_err' 153 | _err(fmt, ##__VA_ARGS__); \ | ^~~~ userfaultfd.c:480:3: note: in expansion of macro 'err' 480 | err("clear WP failed: address=0x%"PRIx64, (uint64_t)start); | ^~~ userfaultfd.c:480:35: note: format string is defined here 480 | err("clear WP failed: address=0x%"PRIx64, (uint64_t)start); | ^ userfaultfd.c: In function 'continue_range': userfaultfd.c:492:48: error: expected ')' before 'PRIx64' 492 | err("UFFDIO_CONTINUE failed for address 0x%" PRIx64, | ^~~~~~ userfaultfd.c:146:29: note: in definition of macro '_err' 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~ userfaultfd.c:492:3: note: in expansion of macro 'err' 492 | err("UFFDIO_CONTINUE failed for address 0x%" PRIx64, | ^~~ userfaultfd.c:146:19: warning: spurious trailing '%' in format [-Wformat=] 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~~~~~~~ userfaultfd.c:153:3: note: in expansion of macro '_err' 153 | _err(fmt, ##__VA_ARGS__); \ | ^~~~ userfaultfd.c:492:3: note: in expansion of macro 'err' 492 | err("UFFDIO_CONTINUE failed for address 0x%" PRIx64, | ^~~ userfaultfd.c:492:45: note: format string is defined here 492 | err("UFFDIO_CONTINUE failed for address 0x%" PRIx64, | ^ userfaultfd.c: In function 'retry_copy_page': 556 | err("UFFDIO_COPY retry error: %"PRId64, | ^~~~~~ userfaultfd.c:146:29: note: in definition of macro '_err' 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~ userfaultfd.c:556:4: note: in expansion of macro 'err' 556 | err("UFFDIO_COPY retry error: %"PRId64, | ^~~ userfaultfd.c:146:19: warning: spurious trailing '%' in format [-Wformat=] 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~~~~~~~ userfaultfd.c:153:3: note: in expansion of macro '_err' 153 | _err(fmt, ##__VA_ARGS__); \ | ^~~~ userfaultfd.c:556:4: note: in expansion of macro 'err' 556 | err("UFFDIO_COPY retry error: %"PRId64, | ^~~ userfaultfd.c:556:34: note: format string is defined here 556 | err("UFFDIO_COPY retry error: %"PRId64, | ^ userfaultfd.c:559:40: error: expected ')' before 'PRId64' 559 | err("UFFDIO_COPY retry unexpected: %"PRId64, | ^~~~~~ userfaultfd.c:146:29: note: in definition of macro '_err' 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~ userfaultfd.c:559:3: note: in expansion of macro 'err' 559 | err("UFFDIO_COPY retry unexpected: %"PRId64, | ^~~ userfaultfd.c:146:19: warning: spurious trailing '%' in format [-Wformat=] 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~~~~~~~ userfaultfd.c:153:3: note: in expansion of macro '_err' 153 | _err(fmt, ##__VA_ARGS__); \ | ^~~~ userfaultfd.c:559:3: note: in expansion of macro 'err' 559 | err("UFFDIO_COPY retry unexpected: %"PRId64, | ^~~ userfaultfd.c:559:38: note: format string is defined here 559 | err("UFFDIO_COPY retry unexpected: %"PRId64, | ^ userfaultfd.c: In function '__copy_page': userfaultfd.c:581:30: error: expected ')' before 'PRId64' 581 | err("UFFDIO_COPY error: %"PRId64, | ^~~~~~ userfaultfd.c:146:29: note: in definition of macro '_err' 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~ userfaultfd.c:581:4: note: in expansion of macro 'err' 581 | err("UFFDIO_COPY error: %"PRId64, | ^~~ userfaultfd.c:146:19: warning: spurious trailing '%' in format [-Wformat=] 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~~~~~~~ userfaultfd.c:153:3: note: in expansion of macro '_err' 153 | _err(fmt, ##__VA_ARGS__); \ | ^~~~ userfaultfd.c:581:4: note: in expansion of macro 'err' 581 | err("UFFDIO_COPY error: %"PRId64, | ^~~ userfaultfd.c:581:28: note: format string is defined here 581 | err("UFFDIO_COPY error: %"PRId64, | ^ userfaultfd.c:584:29: error: expected ')' before 'PRId64' 584 | err("UFFDIO_COPY error: %"PRId64, (int64_t)uffdio_copy.copy); | ^~~~~~ userfaultfd.c:146:29: note: in definition of macro '_err' 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~ userfaultfd.c:584:3: note: in expansion of macro 'err' 584 | err("UFFDIO_COPY error: %"PRId64, (int64_t)uffdio_copy.copy); | ^~~ userfaultfd.c:146:19: warning: spurious trailing '%' in format [-Wformat=] 146 | fprintf(stderr, "ERROR: " fmt, ##__VA_ARGS__); \ | ^~~~~~~~~ userfaultfd.c:153:3: note: in expansion of macro '_err' 153 | _err(fmt, ##__VA_ARGS__); \ | ^~~~ userfaultfd.c:584:3: note: in expansion of macro 'err' 584 | err("UFFDIO_COPY error: %"PRId64, (int64_t)uffdio_copy.copy); | ^~~ userfaultfd.c:584:27: note: format string is defined here 584 | err("UFFDIO_COPY error: %"PRId64, (int64_t)uffdio_copy.copy); | ^ userfaultfd.c: In function 'uffd_handle_page_fault': userfaultfd.c:635:3: error: unknown type name 'uint8_t'; did you mean 'u_int8_t'? 635 | uint8_t *area; | ^~~~~~~ | u_int8_t userfaultfd.c:650:11: error: 'uint8_t' undeclared (first use in this function); did you mean 'u_int8_t'? 650 | area = (uint8_t *)(area_dst + | ^~~~~~~ | u_int8_t userfaultfd.c:650:11: note: each undeclared identifier is reported only once for each function it appears in userfaultfd.c:650:20: error: expected expression before ')' token 650 | area = (uint8_t *)(area_dst + | ^ userfaultfd.c: In function 'retry_uffdio_zeropage': userfaultfd.c:986:34: error: expected ')' before 'PRId64' 986 | err("UFFDIO_ZEROPAGE error: %"PRId64, --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org