Re: [PATCH] kcsan: test: Initialize dummy variable

[Alexander Potapenko]

On Tue, Jul 22, 2025 at 8:39 PM Marco Elver <elver@xxxxxxxxxx> wrote:
>
> 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+ShdXNwC1TNeMt0eXaxeA@xxxxxxxxxxxxxx
> Fixes: 8bc32b348178 ("kcsan: test: Add test cases for memory barrier instrumentation")
> Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
> Signed-off-by: Marco Elver <elver@xxxxxxxxxx>
Reviewed-by: Alexander Potapenko <glider@xxxxxxxxxx>