6.12-stable review patch. If anyone has any objections, please let me know.
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From: Marco Elver elver@google.com
[ Upstream commit 9872916ad1a1a5e7d089e05166c85dbd65e5b0e8 ]
Newer compiler versions rightfully point out:
kernel/kcsan/kcsan_test.c:591:41: error: variable 'dummy' is uninitialized when passed as a const pointer argument here [-Werror,-Wuninitialized-const-pointer] 591 | KCSAN_EXPECT_READ_BARRIER(atomic_read(&dummy), false); | ^~~~~ 1 error generated.
Although this particular test does not care about the value stored in the dummy atomic variable, let's silence the warning.
Link: https://lkml.kernel.org/r/CA+G9fYu8JY=k-r0hnBRSkQQrFJ1Bz+ShdXNwC1TNeMt0eXaxe... Fixes: 8bc32b348178 ("kcsan: test: Add test cases for memory barrier instrumentation") Reported-by: Linux Kernel Functional Testing lkft@linaro.org Reviewed-by: Alexander Potapenko glider@google.com Signed-off-by: Marco Elver elver@google.com Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/kcsan/kcsan_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c index 117d9d4d3c3b..5121d9a6dd3b 100644 --- a/kernel/kcsan/kcsan_test.c +++ b/kernel/kcsan/kcsan_test.c @@ -533,7 +533,7 @@ static void test_barrier_nothreads(struct kunit *test) struct kcsan_scoped_access *reorder_access = NULL; #endif arch_spinlock_t arch_spinlock = __ARCH_SPIN_LOCK_UNLOCKED; - atomic_t dummy; + atomic_t dummy = ATOMIC_INIT(0);
KCSAN_TEST_REQUIRES(test, reorder_access != NULL); KCSAN_TEST_REQUIRES(test, IS_ENABLED(CONFIG_SMP));