linux-kernel - Re: Build regressions/improvements in v5.9-rc8

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Message-ID: <d1457a75d5f38002c063c3801af7819af43e0bfc.camel@tiscali.nl>
Date:   Wed, 07 Oct 2020 13:47:00 +0200
From:   Paul Bolle <pebolle@...cali.nl>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Nick Hu <nickhu@...estech.com>,
        Greentime Hu <green.hu@...il.com>,
        Vincent Chen <deanbo422@...il.com>
Subject: Re: Build regressions/improvements in v5.9-rc8

[Added Richard and Anton.]

Andy Shevchenko schreef op ma 05-10-2020 om 15:58 [+0300]:
> On Mon, Oct 05, 2020 at 11:35:33AM +0200, Geert Uytterhoeven wrote:
> > On Mon, Oct 5, 2020 at 11:33 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > > JFYI, when comparing v5.9-rc8[1] to v5.9-rc7[3], the summaries are:
> > >   - build errors: +3/-6
> 
> Thanks for the report!
> 
> >   + /kisskb/src/drivers/gpio/gpiolib-cdev.c: error: implicit
> > declaration of function 'in_ia32_syscall'
> > [-Werror=implicit-function-declaration]:  => 430:6
> >   + /kisskb/src/drivers/gpio/gpiolib-cdev.c: error: unknown type name
> > 'compat_u64':  => 432:4
> > 
> > x86_64/um-all{mod,yes}config
> 
> I guess the quick fix is to disable that code for UML, I don't know how IOCTLs
> are working in UML in cases when host - guest - guest app either from:
> 	1. x86_64 - x86_64 - i386;
> 	2. x86_64 - i386 - i386.

I ran into this build error too.

Perhaps the UML maintainers have an idea what to do here. The commit that
triggers this error is 5ad284ab3a01 ("gpiolib: Fix line event handling in
syscall compatible mode").

Thanks,


Paul Bolle