The patch titled
Subject: selftests/mm: fix -Wmaybe-uninitialized warnings
has been added to the -mm mm-unstable branch. Its filename is
selftests-mm-fix-wmaybe-uninitialized-warnings.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-mm-fix-wmaybe-uninitialized-warnings.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Kevin Brodsky <kevin.brodsky@xxxxxxx>
Subject: selftests/mm: fix -Wmaybe-uninitialized warnings
Date: Mon, 9 Dec 2024 09:50:07 +0000
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@xxxxxxx
Signed-off-by: Kevin Brodsky <kevin.brodsky@xxxxxxx>
Cc: Aruna Ramakrishna <aruna.ramakrishna@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: Joey Gouly <joey.gouly@xxxxxxx>
Cc: Keith Lucas <keith.lucas@xxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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(-)
--- a/tools/testing/selftests/mm/ksm_tests.c~selftests-mm-fix-wmaybe-uninitialized-warnings
+++ a/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;
--- a/tools/testing/selftests/mm/mremap_test.c~selftests-mm-fix-wmaybe-uninitialized-warnings
+++ a/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;
--- a/tools/testing/selftests/mm/soft-dirty.c~selftests-mm-fix-wmaybe-uninitialized-warnings
+++ a/tools/testing/selftests/mm/soft-dirty.c
@@ -128,7 +128,7 @@ static void test_mprotect(int pagemap_fd
{
const char *type[] = {"file", "anon"};
const char *fname = "./soft-dirty-test-file";
- int test_fd;
+ int test_fd = 0;
char *map;
if (anon) {
--- a/tools/testing/selftests/mm/uffd-unit-tests.c~selftests-mm-fix-wmaybe-uninitialized-warnings
+++ a/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -1122,7 +1122,7 @@ uffd_move_test_common(uffd_test_args_t *
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;
_
Patches currently in -mm which might be from kevin.brodsky@xxxxxxx are
selftests-mm-fix-condition-in-uffd_move_test_common.patch
selftests-mm-fix-wmaybe-uninitialized-warnings.patch
selftests-mm-fix-strncpy-length.patch
selftests-mm-fix-warray-bounds-warnings-in-pkey_sighandler_tests.patch
selftests-mm-build-with-o2.patch
selftests-mm-remove-unused-pkey-helpers.patch
selftests-mm-define-types-using-typedef-in-pkey-helpersh.patch
selftests-mm-ensure-pkey-h-define-inline-functions-only.patch
selftests-mm-remove-empty-pkey-helper-definition.patch
selftests-mm-ensure-non-global-pkey-symbols-are-marked-static.patch
selftests-mm-use-sys_pkey-helpers-consistently.patch
selftests-mm-rename-pkey-register-macro.patch
selftests-mm-skip-pkey_sighandler_tests-if-support-is-missing.patch
selftests-mm-remove-x-permission-from-sigaltstack-mapping.patch
