Enable -Wunreachable-code flag to catch dead code and fix them.

1. Remove the dead code and write a comment instead: hmm-tests.c:2033:3: warning: code will never be executed [-Wunreachable-code] perror("Should not reach this\n"); ^~~~~~

2. ksft_exit_fail_msg() calls exit(). Remove the dead code. split_huge_page_test.c:301:3: warning: code will never be executed [-Wunreachable-code] goto cleanup; ^~~~~~~~~~~~

3. Remove duplicate inline. pkey_sighandler_tests.c:44:15: warning: duplicate 'inline' declaration specifier [-Wduplicate-decl-specifier] static inline __always_inline

Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com --- tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/hmm-tests.c | 5 ++--- tools/testing/selftests/mm/pkey_sighandler_tests.c | 2 +- tools/testing/selftests/mm/split_huge_page_test.c | 4 +--- 4 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index d13b3cef2a2b2..23d4bf6215465 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -34,6 +34,7 @@ endif MAKEFLAGS += --no-builtin-rules

CFLAGS = -Wall -O2 -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES) $(TOOLS_INCLUDES) +CFLAGS += -Wunreachable-code LDLIBS = -lrt -lpthread -lm

# Some distributions (such as Ubuntu) configure GCC so that _FORTIFY_SOURCE is diff --git a/tools/testing/selftests/mm/hmm-tests.c b/tools/testing/selftests/mm/hmm-tests.c index 141bf63cbe05e..15aadaf24a667 100644 --- a/tools/testing/selftests/mm/hmm-tests.c +++ b/tools/testing/selftests/mm/hmm-tests.c @@ -2027,11 +2027,10 @@ TEST_F(hmm, hmm_cow_in_device) if (pid == -1) ASSERT_EQ(pid, 0); if (!pid) { - /* Child process waitd for SIGTERM from the parent. */ + /* Child process waits for SIGTERM from the parent. */ while (1) { } - perror("Should not reach this\n"); - exit(0); + /* Should not reach this */ } /* Parent process writes to COW pages(s) and gets a * new copy in system. In case of device private pages, diff --git a/tools/testing/selftests/mm/pkey_sighandler_tests.c b/tools/testing/selftests/mm/pkey_sighandler_tests.c index b5e076a564c95..302fef54049c8 100644 --- a/tools/testing/selftests/mm/pkey_sighandler_tests.c +++ b/tools/testing/selftests/mm/pkey_sighandler_tests.c @@ -41,7 +41,7 @@ static siginfo_t siginfo = {0}; * syscall will attempt to access the PLT in order to call a library function * which is protected by MPK 0 which we don't have access to. */ -static inline __always_inline +static __always_inline long syscall_raw(long n, long a1, long a2, long a3, long a4, long a5, long a6) { unsigned long ret; diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c index 05de1fc0005b7..a85b2e393e4e8 100644 --- a/tools/testing/selftests/mm/split_huge_page_test.c +++ b/tools/testing/selftests/mm/split_huge_page_test.c @@ -296,10 +296,8 @@ void split_file_backed_thp(int order) ksft_exit_fail_msg("Unable to create a tmpfs for testing\n");

status = snprintf(testfile, INPUT_MAX, "%s/thp_file", tmpfs_loc); - if (status >= INPUT_MAX) { + if (status >= INPUT_MAX) ksft_exit_fail_msg("Fail to create file-backed THP split testing file\n"); - goto cleanup; - }

fd = open(testfile, O_CREAT|O_RDWR, 0664); if (fd == -1) {

Add __unused macro instead of using the complete verbose unused compiler attribute. The raw __attribute__((__unused__)) is quite long and makes code too much verbose to the kernel developer's taste.

Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com --- tools/testing/selftests/kselftest.h | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h index c3b6d2604b1e4..8d17036d88396 100644 --- a/tools/testing/selftests/kselftest.h +++ b/tools/testing/selftests/kselftest.h @@ -92,6 +92,10 @@ #endif #define __printf(a, b) __attribute__((format(printf, a, b)))

+#ifndef __unused +#define __unused __attribute__((__unused__)) +#endif + /* counters */ struct ksft_count { unsigned int ksft_pass;

Add -Wunused family of flags and fix all the warnings coming because of argc and argv. Remove them if they aren't being used entirely. Use __unused compiler attribute with argc where argv is being used.

Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com --- tools/testing/selftests/mm/Makefile | 2 +- tools/testing/selftests/mm/compaction_test.c | 2 +- tools/testing/selftests/mm/cow.c | 2 +- tools/testing/selftests/mm/droppable.c | 2 +- tools/testing/selftests/mm/gup_longterm.c | 2 +- tools/testing/selftests/mm/hugepage-vmemmap.c | 2 +- tools/testing/selftests/mm/hugetlb-madvise.c | 2 +- tools/testing/selftests/mm/hugetlb-soft-offline.c | 2 +- tools/testing/selftests/mm/madv_populate.c | 2 +- tools/testing/selftests/mm/map_populate.c | 2 +- tools/testing/selftests/mm/memfd_secret.c | 2 +- tools/testing/selftests/mm/mlock-random-test.c | 2 +- tools/testing/selftests/mm/mlock2-tests.c | 2 +- tools/testing/selftests/mm/on-fault-limit.c | 2 +- tools/testing/selftests/mm/pkey_sighandler_tests.c | 2 +- tools/testing/selftests/mm/soft-dirty.c | 2 +- tools/testing/selftests/mm/uffd-wp-mremap.c | 2 +- tools/testing/selftests/mm/virtual_address_range.c | 2 +- 18 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index 23d4bf6215465..d75f1effcb791 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -20,7 +20,6 @@ endif # thus tricking Make (and you!) into believing that All Is Well, in subsequent # make invocations: .DELETE_ON_ERROR: - # Avoid accidental wrong builds, due to built-in rules working just a little # bit too well--but not quite as well as required for our situation here. # @@ -35,6 +34,7 @@ MAKEFLAGS += --no-builtin-rules

CFLAGS = -Wall -O2 -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES) $(TOOLS_INCLUDES) CFLAGS += -Wunreachable-code +CFLAGS += -Wunused -Wunused-parameter -Wunused-function -Wunused-label -Wunused-variable -Wunused-value LDLIBS = -lrt -lpthread -lm

# Some distributions (such as Ubuntu) configure GCC so that _FORTIFY_SOURCE is diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c index 9bc4591c7b169..4fa03679e9b07 100644 --- a/tools/testing/selftests/mm/compaction_test.c +++ b/tools/testing/selftests/mm/compaction_test.c @@ -203,7 +203,7 @@ int set_zero_hugepages(unsigned long *initial_nr_hugepages) return ret; }

-int main(int argc, char **argv) +int main(void) { struct rlimit lim; struct map_list *list = NULL, *entry; diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c index d30625c18259b..eb1ccf067b633 100644 --- a/tools/testing/selftests/mm/cow.c +++ b/tools/testing/selftests/mm/cow.c @@ -1857,7 +1857,7 @@ static int tests_per_non_anon_test_case(void) return tests; }

-int main(int argc, char **argv) +int main(void) { struct thp_settings default_settings;

diff --git a/tools/testing/selftests/mm/droppable.c b/tools/testing/selftests/mm/droppable.c index f3d9ecf96890a..90ea6377810c5 100644 --- a/tools/testing/selftests/mm/droppable.c +++ b/tools/testing/selftests/mm/droppable.c @@ -15,7 +15,7 @@

#include "../kselftest.h"

-int main(int argc, char *argv[]) +int main(void) { size_t alloc_size = 134217728; size_t page_size = getpagesize(); diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c index 268dadb8ce438..7fe4f94400cb6 100644 --- a/tools/testing/selftests/mm/gup_longterm.c +++ b/tools/testing/selftests/mm/gup_longterm.c @@ -504,7 +504,7 @@ static int tests_per_test_case(void) return 3 + nr_hugetlbsizes; }

-int main(int argc, char **argv) +int main(void) { int i;

diff --git a/tools/testing/selftests/mm/hugepage-vmemmap.c b/tools/testing/selftests/mm/hugepage-vmemmap.c index df366a4d1b92d..23e97e552057d 100644 --- a/tools/testing/selftests/mm/hugepage-vmemmap.c +++ b/tools/testing/selftests/mm/hugepage-vmemmap.c @@ -87,7 +87,7 @@ static int check_page_flags(unsigned long pfn) return 0; }

-int main(int argc, char **argv) +int main(void) { void *addr; unsigned long pfn; diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c index 1afe14b9dc0c3..27c8e46ae9b7d 100644 --- a/tools/testing/selftests/mm/hugetlb-madvise.c +++ b/tools/testing/selftests/mm/hugetlb-madvise.c @@ -55,7 +55,7 @@ void read_fault_pages(void *addr, unsigned long nr_pages) } }

-int main(int argc, char **argv) +int main(int __unused argc, char **argv) { unsigned long free_hugepages; void *addr, *addr2; diff --git a/tools/testing/selftests/mm/hugetlb-soft-offline.c b/tools/testing/selftests/mm/hugetlb-soft-offline.c index f086f0e04756f..cb087303f5ed3 100644 --- a/tools/testing/selftests/mm/hugetlb-soft-offline.c +++ b/tools/testing/selftests/mm/hugetlb-soft-offline.c @@ -216,7 +216,7 @@ static void test_soft_offline_common(int enable_soft_offline) enable_soft_offline); }

-int main(int argc, char **argv) +int main(void) { ksft_print_header(); ksft_set_plan(2); diff --git a/tools/testing/selftests/mm/madv_populate.c b/tools/testing/selftests/mm/madv_populate.c index b6fabd5c27ed6..178e0ae0cd4a1 100644 --- a/tools/testing/selftests/mm/madv_populate.c +++ b/tools/testing/selftests/mm/madv_populate.c @@ -281,7 +281,7 @@ static int system_has_softdirty(void) #endif }

-int main(int argc, char **argv) +int main(void) { int nr_tests = 16; int err; diff --git a/tools/testing/selftests/mm/map_populate.c b/tools/testing/selftests/mm/map_populate.c index 9df2636c829bf..2b240499f15c9 100644 --- a/tools/testing/selftests/mm/map_populate.c +++ b/tools/testing/selftests/mm/map_populate.c @@ -76,7 +76,7 @@ static int child_f(int sock, unsigned long *smap, int fd) return ksft_cnt.ksft_pass; }

-int main(int argc, char **argv) +int main(void) { int sock[2], child, ret; FILE *ftmp; diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c index 9a0597310a765..836383f63b630 100644 --- a/tools/testing/selftests/mm/memfd_secret.c +++ b/tools/testing/selftests/mm/memfd_secret.c @@ -299,7 +299,7 @@ static void prepare(void)

#define NUM_TESTS 6

-int main(int argc, char *argv[]) +int main(void) { int fd;

diff --git a/tools/testing/selftests/mm/mlock-random-test.c b/tools/testing/selftests/mm/mlock-random-test.c index b8d7e966f44c6..4ff7a4cfc7331 100644 --- a/tools/testing/selftests/mm/mlock-random-test.c +++ b/tools/testing/selftests/mm/mlock-random-test.c @@ -236,7 +236,7 @@ static void test_mlock_outof_limit(char *p, int alloc_size) ksft_test_result_pass("%s\n", __func__); }

-int main(int argc, char **argv) +int main(void) { char *p = NULL;

diff --git a/tools/testing/selftests/mm/mlock2-tests.c b/tools/testing/selftests/mm/mlock2-tests.c index 3e90ff37e336a..ce5fd5ce1f51f 100644 --- a/tools/testing/selftests/mm/mlock2-tests.c +++ b/tools/testing/selftests/mm/mlock2-tests.c @@ -425,7 +425,7 @@ static void test_mlockall(void) munlockall(); }

-int main(int argc, char **argv) +int main(void) { int ret, size = 3 * getpagesize(); void *map; diff --git a/tools/testing/selftests/mm/on-fault-limit.c b/tools/testing/selftests/mm/on-fault-limit.c index 431c1277d83a1..ade160966c926 100644 --- a/tools/testing/selftests/mm/on-fault-limit.c +++ b/tools/testing/selftests/mm/on-fault-limit.c @@ -28,7 +28,7 @@ static void test_limit(void) munlockall(); }

-int main(int argc, char **argv) +int main(void) { ksft_print_header(); ksft_set_plan(1); diff --git a/tools/testing/selftests/mm/pkey_sighandler_tests.c b/tools/testing/selftests/mm/pkey_sighandler_tests.c index 302fef54049c8..eb4ef8532c0bf 100644 --- a/tools/testing/selftests/mm/pkey_sighandler_tests.c +++ b/tools/testing/selftests/mm/pkey_sighandler_tests.c @@ -528,7 +528,7 @@ static void (*pkey_tests[])(void) = { test_pkru_sigreturn };

-int main(int argc, char *argv[]) +int main(void) { int i;

diff --git a/tools/testing/selftests/mm/soft-dirty.c b/tools/testing/selftests/mm/soft-dirty.c index 8a3f2b4b21869..e62be4136f69e 100644 --- a/tools/testing/selftests/mm/soft-dirty.c +++ b/tools/testing/selftests/mm/soft-dirty.c @@ -194,7 +194,7 @@ static void test_mprotect_file(int pagemap_fd, int pagesize) test_mprotect(pagemap_fd, pagesize, false); }

-int main(int argc, char **argv) +int main(void) { int pagemap_fd; int pagesize; diff --git a/tools/testing/selftests/mm/uffd-wp-mremap.c b/tools/testing/selftests/mm/uffd-wp-mremap.c index c2ba7d46c7b45..13ceb56289701 100644 --- a/tools/testing/selftests/mm/uffd-wp-mremap.c +++ b/tools/testing/selftests/mm/uffd-wp-mremap.c @@ -334,7 +334,7 @@ static const struct testcase testcases[] = { }, };

-int main(int argc, char **argv) +int main(void) { struct thp_settings settings; int i, j, plan = 0; diff --git a/tools/testing/selftests/mm/virtual_address_range.c b/tools/testing/selftests/mm/virtual_address_range.c index 169dbd692bf5f..3c21d136962cb 100644 --- a/tools/testing/selftests/mm/virtual_address_range.c +++ b/tools/testing/selftests/mm/virtual_address_range.c @@ -189,7 +189,7 @@ static int validate_complete_va_space(void) return 0; }

-int main(int argc, char *argv[]) +int main(void) { char *ptr[NR_CHUNKS_LOW]; char **hptr;

Mark the arguments which cannot be removed with __unused attribute.

Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com --- tools/testing/selftests/mm/cow.c | 20 ++++++------- tools/testing/selftests/mm/memfd_secret.c | 4 +-- tools/testing/selftests/mm/pfnmap.c | 2 +- tools/testing/selftests/mm/uffd-common.c | 11 +++---- tools/testing/selftests/mm/uffd-unit-tests.c | 30 ++++++++++---------- 5 files changed, 34 insertions(+), 33 deletions(-)

diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c index eb1ccf067b633..6f6c4e85240c7 100644 --- a/tools/testing/selftests/mm/cow.c +++ b/tools/testing/selftests/mm/cow.c @@ -253,12 +253,12 @@ static void do_test_cow_in_parent(char *mem, size_t size, bool do_mprotect, close_comm_pipes(&comm_pipes); }

-static void test_cow_in_parent(char *mem, size_t size, bool is_hugetlb) +static void test_cow_in_parent(char *mem, size_t size, bool __unused is_hugetlb) { do_test_cow_in_parent(mem, size, false, child_memcmp_fn, false); }

-static void test_cow_in_parent_mprotect(char *mem, size_t size, bool is_hugetlb) +static void test_cow_in_parent_mprotect(char *mem, size_t size, bool __unused is_hugetlb) { do_test_cow_in_parent(mem, size, true, child_memcmp_fn, false); } @@ -734,36 +734,36 @@ static void do_test_ro_pin(char *mem, size_t size, enum ro_pin_test test, free(tmp); }

-static void test_ro_pin_on_shared(char *mem, size_t size, bool is_hugetlb) +static void test_ro_pin_on_shared(char *mem, size_t size, bool __unused is_hugetlb) { do_test_ro_pin(mem, size, RO_PIN_TEST_SHARED, false); }

-static void test_ro_fast_pin_on_shared(char *mem, size_t size, bool is_hugetlb) +static void test_ro_fast_pin_on_shared(char *mem, size_t size, bool __unused is_hugetlb) { do_test_ro_pin(mem, size, RO_PIN_TEST_SHARED, true); }

static void test_ro_pin_on_ro_previously_shared(char *mem, size_t size, - bool is_hugetlb) + bool __unused is_hugetlb) { do_test_ro_pin(mem, size, RO_PIN_TEST_PREVIOUSLY_SHARED, false); }

static void test_ro_fast_pin_on_ro_previously_shared(char *mem, size_t size, - bool is_hugetlb) + bool __unused is_hugetlb) { do_test_ro_pin(mem, size, RO_PIN_TEST_PREVIOUSLY_SHARED, true); }

static void test_ro_pin_on_ro_exclusive(char *mem, size_t size, - bool is_hugetlb) + bool __unused is_hugetlb) { do_test_ro_pin(mem, size, RO_PIN_TEST_RO_EXCLUSIVE, false); }

static void test_ro_fast_pin_on_ro_exclusive(char *mem, size_t size, - bool is_hugetlb) + bool __unused is_hugetlb) { do_test_ro_pin(mem, size, RO_PIN_TEST_RO_EXCLUSIVE, true); } @@ -1522,12 +1522,12 @@ static void test_cow(char *mem, const char *smem, size_t size) free(old); }

-static void test_ro_pin(char *mem, const char *smem, size_t size) +static void test_ro_pin(char *mem, const char __unused *smem, size_t size) { do_test_ro_pin(mem, size, RO_PIN_TEST, false); }

-static void test_ro_fast_pin(char *mem, const char *smem, size_t size) +static void test_ro_fast_pin(char *mem, const char __unused *smem, size_t size) { do_test_ro_pin(mem, size, RO_PIN_TEST, true); } diff --git a/tools/testing/selftests/mm/memfd_secret.c b/tools/testing/selftests/mm/memfd_secret.c index 836383f63b630..7117cc0f56dbb 100644 --- a/tools/testing/selftests/mm/memfd_secret.c +++ b/tools/testing/selftests/mm/memfd_secret.c @@ -123,7 +123,7 @@ static void test_vmsplice(int fd, const char *desc) close(pipefd[1]); }

-static void try_process_vm_read(int fd, int pipefd[2]) +static void try_process_vm_read(int __unused fd, int pipefd[2]) { struct iovec liov, riov; char buf[64]; @@ -147,7 +147,7 @@ static void try_process_vm_read(int fd, int pipefd[2]) exit(KSFT_FAIL); }

-static void try_ptrace(int fd, int pipefd[2]) +static void try_ptrace(int __unused fd, int pipefd[2]) { pid_t ppid = getppid(); int status; diff --git a/tools/testing/selftests/mm/pfnmap.c b/tools/testing/selftests/mm/pfnmap.c index 866ac023baf5c..54c9af20d312e 100644 --- a/tools/testing/selftests/mm/pfnmap.c +++ b/tools/testing/selftests/mm/pfnmap.c @@ -26,7 +26,7 @@

static sigjmp_buf sigjmp_buf_env;

-static void signal_handler(int sig) +static void signal_handler(int __unused sig) { siglongjmp(sigjmp_buf_env, -EFAULT); } diff --git a/tools/testing/selftests/mm/uffd-common.c b/tools/testing/selftests/mm/uffd-common.c index 815c22114b57e..e309ec886fa72 100644 --- a/tools/testing/selftests/mm/uffd-common.c +++ b/tools/testing/selftests/mm/uffd-common.c @@ -46,7 +46,7 @@ static void anon_release_pages(char *rel_area) err("madvise(MADV_DONTNEED) failed"); }

-static int anon_allocate_area(void **alloc_area, bool is_src) +static int anon_allocate_area(void **alloc_area, bool __unused is_src) { *alloc_area = mmap(NULL, nr_pages * page_size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); @@ -57,7 +57,8 @@ static int anon_allocate_area(void **alloc_area, bool is_src) return 0; }

-static void noop_alias_mapping(__u64 *start, size_t len, unsigned long offset) +static void noop_alias_mapping(__u64 __unused *start, size_t __unused len, + unsigned long __unused offset) { }

@@ -108,7 +109,7 @@ static int hugetlb_allocate_area(void **alloc_area, bool is_src) return 0; }

-static void hugetlb_alias_mapping(__u64 *start, size_t len, unsigned long offset) +static void hugetlb_alias_mapping(__u64 *start, size_t __unused len, unsigned long offset) { if (!map_shared) return; @@ -167,12 +168,12 @@ static int shmem_allocate_area(void **alloc_area, bool is_src) return 0; }

-static void shmem_alias_mapping(__u64 *start, size_t len, unsigned long offset) +static void shmem_alias_mapping(__u64 *start, size_t __unused len, unsigned long offset) { *start = (unsigned long)area_dst_alias + offset; }

-static void shmem_check_pmd_mapping(void *p, int expect_nr_hpages) +static void shmem_check_pmd_mapping(void __unused *p, int expect_nr_hpages) { if (!check_huge_shmem(area_dst_alias, expect_nr_hpages, read_pmd_pagesize())) diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c index df7b82bbebaad..ee9b407e893e1 100644 --- a/tools/testing/selftests/mm/uffd-unit-tests.c +++ b/tools/testing/selftests/mm/uffd-unit-tests.c @@ -361,7 +361,7 @@ static int pagemap_test_fork(int uffd, bool with_event, bool test_pin) return result; }

-static void uffd_wp_unpopulated_test(uffd_test_args_t *args) +static void uffd_wp_unpopulated_test(uffd_test_args_t __unused *args) { uint64_t value; int pagemap_fd; @@ -487,7 +487,7 @@ static void uffd_wp_fork_with_event_test(uffd_test_args_t *args) uffd_wp_fork_test_common(args, true); }

-static void uffd_wp_fork_pin_test_common(uffd_test_args_t *args, +static void uffd_wp_fork_pin_test_common(uffd_test_args_t __unused *args, bool with_event) { int pagemap_fd; @@ -631,24 +631,24 @@ static void uffd_minor_test_common(bool test_collapse, bool test_wp) uffd_test_pass(); }

-void uffd_minor_test(uffd_test_args_t *args) +void uffd_minor_test(uffd_test_args_t __unused *args) { uffd_minor_test_common(false, false); }

-void uffd_minor_wp_test(uffd_test_args_t *args) +void uffd_minor_wp_test(uffd_test_args_t __unused *args) { uffd_minor_test_common(false, true); }

-void uffd_minor_collapse_test(uffd_test_args_t *args) +void uffd_minor_collapse_test(uffd_test_args_t __unused *args) { uffd_minor_test_common(true, false); }

static sigjmp_buf jbuf, *sigbuf;

-static void sighndl(int sig, siginfo_t *siginfo, void *ptr) +static void sighndl(int sig, siginfo_t __unused *siginfo, void __unused *ptr) { if (sig == SIGBUS) { if (sigbuf) @@ -824,12 +824,12 @@ static void uffd_sigbus_test_common(bool wp) uffd_test_pass(); }

-static void uffd_sigbus_test(uffd_test_args_t *args) +static void uffd_sigbus_test(uffd_test_args_t __unused *args) { uffd_sigbus_test_common(false); }

-static void uffd_sigbus_wp_test(uffd_test_args_t *args) +static void uffd_sigbus_wp_test(uffd_test_args_t __unused *args) { uffd_sigbus_test_common(true); } @@ -877,12 +877,12 @@ static void uffd_events_test_common(bool wp) uffd_test_pass(); }

-static void uffd_events_test(uffd_test_args_t *args) +static void uffd_events_test(uffd_test_args_t __unused *args) { uffd_events_test_common(false); }

-static void uffd_events_wp_test(uffd_test_args_t *args) +static void uffd_events_wp_test(uffd_test_args_t __unused *args) { uffd_events_test_common(true); } @@ -950,7 +950,7 @@ uffd_register_detect_zeropage(int uffd, void *addr, uint64_t len) }

/* exercise UFFDIO_ZEROPAGE */ -static void uffd_zeropage_test(uffd_test_args_t *args) +static void uffd_zeropage_test(uffd_test_args_t __unused *args) { bool has_zeropage; int i; @@ -1006,7 +1006,7 @@ static void do_uffdio_poison(int uffd, unsigned long offset) }

static void uffd_poison_handle_fault( - struct uffd_msg *msg, struct uffd_args *args) + struct uffd_msg *msg, struct uffd_args __unused *args) { unsigned long offset;

@@ -1030,7 +1030,7 @@ static void uffd_poison_handle_fault( /* Make sure to cover odd/even, and minimum duplications */ #define UFFD_POISON_TEST_NPAGES 4

-static void uffd_poison_test(uffd_test_args_t *targs) +static void uffd_poison_test(uffd_test_args_t __unused *targs) { pthread_t uffd_mon; char c; @@ -1126,7 +1126,7 @@ static void uffd_move_pmd_handle_fault(struct uffd_msg *msg, }

static void -uffd_move_test_common(uffd_test_args_t *targs, unsigned long chunk_size, +uffd_move_test_common(uffd_test_args_t __unused *targs, unsigned long chunk_size, void (*handle_fault)(struct uffd_msg *msg, struct uffd_args *args)) { unsigned long nr; @@ -1359,7 +1359,7 @@ static void uffd_consume_message(void) while (uffd_read_msg(&msg)); }

-static void uffd_mmap_changing_test(uffd_test_args_t *targs) +static void uffd_mmap_changing_test(uffd_test_args_t __unused *targs) { /* * This stores the real PID (which can be different from how tid is

There are functions which have unused arguments for different architectures. Separate the code for each architecture and move #ifdef arch outside these functions.

Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com --- tools/testing/selftests/mm/mseal_test.c | 8 +++++-- .../selftests/mm/pkey_sighandler_tests.c | 21 ++++++++++++++++--- 2 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/mm/mseal_test.c b/tools/testing/selftests/mm/mseal_test.c index 34c042da4de27..af49f72e1f465 100644 --- a/tools/testing/selftests/mm/mseal_test.c +++ b/tools/testing/selftests/mm/mseal_test.c @@ -131,17 +131,21 @@ static unsigned int __read_pkey_reg(void) return pkey_reg; }

+#if defined(__i386__) || defined(__x86_64__) /* arch */ static void __write_pkey_reg(u64 pkey_reg) { -#if defined(__i386__) || defined(__x86_64__) /* arch */ unsigned int eax = pkey_reg; unsigned int ecx = 0; unsigned int edx = 0;

asm volatile(".byte 0x0f,0x01,0xef\n\t" : : "a" (eax), "c" (ecx), "d" (edx)); -#endif } +#else +static void __write_pkey_reg(u64 __unused pkey_reg) +{ +} +#endif

static unsigned long pkey_bit_position(int pkey) { diff --git a/tools/testing/selftests/mm/pkey_sighandler_tests.c b/tools/testing/selftests/mm/pkey_sighandler_tests.c index 638477494ff3a..68f106d0876a7 100644 --- a/tools/testing/selftests/mm/pkey_sighandler_tests.c +++ b/tools/testing/selftests/mm/pkey_sighandler_tests.c @@ -41,11 +41,12 @@ static siginfo_t siginfo = {0}; * syscall will attempt to access the PLT in order to call a library function * which is protected by MPK 0 which we don't have access to. */ +#ifdef __x86_64__ static __always_inline long syscall_raw(long n, long a1, long a2, long a3, long a4, long a5, long a6) { unsigned long ret; -#ifdef __x86_64__ + register long r10 asm("r10") = a4; register long r8 asm("r8") = a5; register long r9 asm("r9") = a6; @@ -53,12 +54,26 @@ long syscall_raw(long n, long a1, long a2, long a3, long a4, long a5, long a6) : "=a"(ret) : "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(r10), "r"(r8), "r"(r9) : "rcx", "r11", "memory"); + return ret; +} #elif defined __i386__ +static __always_inline +long syscall_raw(long n, long a1, long a2, long a3, long a4, long a5, long __unused a6) +{ + unsigned long ret; + asm volatile ("int $0x80" : "=a"(ret) : "a"(n), "b"(a1), "c"(a2), "d"(a3), "S"(a4), "D"(a5) : "memory"); + return ret; +} #elif defined __aarch64__ +static __always_inline +long syscall_raw(long n, long a1, long a2, long a3, long a4, long a5, long a6) +{ + unsigned long ret; + register long x0 asm("x0") = a1; register long x1 asm("x1") = a2; register long x2 asm("x2") = a3; @@ -71,11 +86,11 @@ long syscall_raw(long n, long a1, long a2, long a3, long a4, long a5, long a6) : "r"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x4), "r"(x5), "r"(x8) : "memory"); ret = x0; + return ret; +} #else # error syscall_raw() not implemented #endif - return ret; -}

static inline long clone_raw(unsigned long flags, void *stack, int *parent_tid, int *child_tid)