Re: mm/vmalloc.c:4691:25: error: variable 'addr' is uninitialized when used here [-Werror,-Wuninitialized]

[Dan Carpenter]

On Thu, Jan 11, 2024 at 04:23:09PM +0530, Naresh Kamboju wrote:
> Following build failures noticed on i386 and x86 with clang builds on the
> Linux next-20240111 tag.
> 
> Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
> 
> Build error:
> ----------
> mm/vmalloc.c:4691:25: error: variable 'addr' is uninitialized when
> used here [-Werror,-Wuninitialized]
>  4691 |                 va = __find_vmap_area(addr, &vn->busy.root);
>       |                                       ^~~~
> mm/vmalloc.c:4684:20: note: initialize the variable 'addr' to silence
> this warning
>  4684 |         unsigned long addr;
>       |                           ^
>       |                            = 0
> 1 error generated.

We turned off uninitialized variable warnings for GCC a long time ago...
:/ I don't know if we'll be able to re-enable it in a -Werror world
although Clang seems to be managing alright so perhaps there is hope.

regards,
dan carpenter