On Mon, Oct 26, 2020 at 12:41 PM Guenter Roeck <linux@roeck-us.net> wrote:
>
> make ARCH=um SUBARCH=x86_64 defconfig:
>
> Building um:defconfig ... failed
> --------------
> Error log:
> arch/um/kernel/skas/clone.c:24:16: error: expected declaration specifiers or '...' before string constant
> arch/x86/um/stub_segv.c:11:16: error: expected declaration specifiers or '...' before string constant

Weird. Is __section() not defined somehow for those files?

It does look like they have very minimal headers, so undoing that
patch just for those two files is likely the right thing to do.

> As with s390, reverting this patch fixes the problem.

s390 should be fixed already.

Is the attached minimal patch sufficient for um to get back to working
order, or is there something else hiding there too?

                   Linus