Re: [PATCH 08/24] init: pass root_device_name explicitly

Max Filippov
2023-06-27T10:39:07Z

On Mon, Jun 26, 2023 at 8:10 AM Guenter Roeck <linux@roeck-us.net> wrote:
>
> On 6/26/23 00:53, Christoph Hellwig wrote:
> > On Fri, Jun 23, 2023 at 05:08:59PM -0700, Guenter Roeck wrote:
> >> Hi,
> >>
> >> On Wed, May 31, 2023 at 02:55:19PM +0200, Christoph Hellwig wrote:
> >>> Instead of declaring root_device_name as a global variable pass it as an
> >>> argument to the functions using it.
> >>>
> >>> Signed-off-by: Christoph Hellwig <hch@lst.de>
> >>
> >> This patch results in the following build error when trying to build
> >> xtensa:tinyconfig.
> >>
> >> WARNING: modpost: vmlinux: section mismatch in reference: strcpy.isra.0+0x14 (section: .text.unlikely) -> initcall_level_names (section: .init.data)
> >> ERROR: modpost: Section mismatches detected.
> >
> > I can reproduce these with gcc 13.1 on xtensa, but the report makes
> > no sense to me. If I disable CONFIG_CC_OPTIMIZE_FOR_SIZE it now reports
> > a similar warning for put_page intead of strcpy which seems just as
> > arcance.
> >
>
> I don't see that (I tried 11.3, 11.4, 12.3, and 13.1), but then I am not sure
> if this is worth tracking down. I just force CONFIG_SECTION_MISMATCH_WARN_ONLY=y
> for xtensa builds instead.

I believe it's yet another manifestation of the following issue:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92938

Hunting is still on my todo list, but it's quite low, so I guess
forcing CONFIG_SECTION_MISMATCH_WARN_ONLY=y for xtensa
is the right thing to do for now.

--
Thanks.
-- Max