[PATCH 02/14] selftests/mm: Fix -Wmaybe-uninitialized warnings

[Kevin Brodsky]

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.

Signed-off-by: Kevin Brodsky <kevin.brod...@arm.com>
---
 tools/testing/selftests/mm/ksm_tests.c       | 2 +-
 tools/testing/selftests/mm/mremap_test.c     | 2 +-
 tools/testing/selftests/mm/soft-dirty.c      | 2 +-
 tools/testing/selftests/mm/uffd-unit-tests.c | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/mm/ksm_tests.c 
b/tools/testing/selftests/mm/ksm_tests.c
index b748c48908d9..dcdd5bb20f3d 100644
--- a/tools/testing/selftests/mm/ksm_tests.c
+++ b/tools/testing/selftests/mm/ksm_tests.c
@@ -776,7 +776,7 @@ static int ksm_cow_time(int merge_type, int mapping, int 
prot, int timeout, size
 
 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 5a3a9bcba640..056b227f4a30 100644
--- a/tools/testing/selftests/mm/mremap_test.c
+++ b/tools/testing/selftests/mm/mremap_test.c
@@ -384,7 +384,7 @@ static void mremap_move_within_range(unsigned int 
pattern_seed, char *rand_addr)
 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 bdfa5d085f00..8e1462ce0532 100644
--- 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 74c884713bf7..9ff71fa1f9bf 100644
--- 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;
-- 
2.47.0