selftests/mm: fix -Wmaybe-uninitialized warnings

A few -Wmaybe-uninitialized warnings show up when building the mm tests
with -O2.  None of them looks worrying; silence them by initialising the
problematic variables.

Link: https://lkml.kernel.org/r/20241209095019.1732120-3-kevin.brodsky@arm.com
Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Aruna Ramakrishna <aruna.ramakrishna@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Joey Gouly <joey.gouly@arm.com>
Cc: Keith Lucas <keith.lucas@oracle.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/tools/testing/selftests/mm/ksm_tests.c b/tools/testing/selftests/mm/ksm_tests.c
index b748c48..dcdd5bb 100644 (file)
--- a/tools/testing/selftests/mm/ksm_tests.c
+++ b/tools/testing/selftests/mm/ksm_tests.c
@@ -776,7 +776,7 @@ err_out:
 
 int main(int argc, char *argv[])
 {
-       int ret, opt;
+       int ret = 0, opt;
        int prot = 0;
        int ksm_scan_limit_sec = KSM_SCAN_LIMIT_SEC_DEFAULT;
        int merge_type = KSM_MERGE_TYPE_DEFAULT;

diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c
index d207a52..bb84476 100644 (file)
--- a/tools/testing/selftests/mm/mremap_test.c
+++ b/tools/testing/selftests/mm/mremap_test.c
@@ -384,7 +384,7 @@ out:
 static long long remap_region(struct config c, unsigned int threshold_mb,
                              char *rand_addr)
 {
-       void *addr, *src_addr, *dest_addr, *dest_preamble_addr;
+       void *addr, *src_addr, *dest_addr, *dest_preamble_addr = NULL;
        unsigned long long t, d;
        struct timespec t_start = {0, 0}, t_end = {0, 0};
        long long  start_ns, end_ns, align_mask, ret, offset;

diff --git a/tools/testing/selftests/mm/soft-dirty.c b/tools/testing/selftests/mm/soft-dirty.c
index bdfa5d0..8e1462c 100644 (file)
--- a/tools/testing/selftests/mm/soft-dirty.c
+++ b/tools/testing/selftests/mm/soft-dirty.c
@@ -128,7 +128,7 @@ static void test_mprotect(int pagemap_fd, int pagesize, bool anon)
 {
        const char *type[] = {"file", "anon"};
        const char *fname = "./soft-dirty-test-file";
-       int test_fd;
+       int test_fd = 0;
        char *map;
 
        if (anon) {

diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c
index 74c8847..9ff71fa 100644 (file)
--- a/tools/testing/selftests/mm/uffd-unit-tests.c
+++ b/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -1122,7 +1122,7 @@ uffd_move_test_common(uffd_test_args_t *targs, unsigned long chunk_size,
        char c;
        unsigned long long count;
        struct uffd_args args = { 0 };
-       char *orig_area_src, *orig_area_dst;
+       char *orig_area_src = NULL, *orig_area_dst = NULL;
        unsigned long step_size, step_count;
        unsigned long src_offs = 0;
        unsigned long dst_offs = 0;