Re: [PATCH v16 mfd 8/8] mfd: ocelot: add support for the vsc7512 chip via spi

[Ido Schimmel]

On Mon, Aug 15, 2022 at 07:19:13AM -0700, Colin Foster wrote:
> Something is going on that I don't fully understand with <asm/byteorder.h>.
> I don't quite see how ocelot-core is throwing all sorts of errors in x86
> builds now:
> 
> https://patchwork.hopto.org/static/nipa/667471/12942993/build_allmodconfig_warn/stderr
> 
> Snippet from there:
> 
> /home/nipa/nipa/tests/patch/build_32bit/build_32bit.sh: line 21: ccache gcc: command not found
> ../drivers/mfd/ocelot-spi.c: note: in included file (through ../include/linux/bitops.h, ../include/linux/kernel.h, ../arch/x86/include/asm/percpu.h, ../arch/x86/include/asm/current.h, ../include/linux/sched.h, ...):
> ../arch/x86/include/asm/bitops.h:66:1: warning: unreplaced symbol 'return'
> ../drivers/mfd/ocelot-spi.c: note: in included file (through ../include/linux/bitops.h, ../include/linux/kernel.h, ../arch/x86/include/asm/percpu.h, ../arch/x86/include/asm/current.h, ../include/linux/sched.h, ...):
> ../include/asm-generic/bitops/generic-non-atomic.h:29:9: warning: unreplaced symbol 'mask'
> ../include/asm-generic/bitops/generic-non-atomic.h:30:9: warning: unreplaced symbol 'p'
> ../include/asm-generic/bitops/generic-non-atomic.h:32:10: warning: unreplaced symbol 'p'
> ../include/asm-generic/bitops/generic-non-atomic.h:32:16: warning: unreplaced symbol 'mask'
> ../include/asm-generic/bitops/generic-non-atomic.h:27:1: warning: unreplaced symbol 'return'
> ../drivers/mfd/ocelot-spi.c: note: in included file (through ../arch/x86/include/asm/bitops.h, ../include/linux/bitops.h, ../include/linux/kernel.h, ../arch/x86/include/asm/percpu.h, ../arch/x86/include/asm/current.h, ...):
> ../include/asm-generic/bitops/instrumented-non-atomic.h:26:1: warning: unreplaced symbol 'return'
> 
> 
> <asm/byteorder.h> was included in both drivers/mfd/ocelot-spi.c and
> drivers/mfd/ocelot.h previously, though Andy pointed out there didn't
> seem to be any users... and I didn't either. I'm sure there's something
> I must be missing.

I got similar errors in our internal CI yesterday. Fixed by compiling
sparse from git:
https://git.kernel.org/pub/scm/devel/sparse/sparse.git/commit/?id=0e1aae55e49cad7ea43848af5b58ff0f57e7af99

The update is also available in the "testing" repo in case you are
running Fedora 35 / 36:
https://bodhi.fedoraproject.org/updates/FEDORA-2022-c58b53730f
https://bodhi.fedoraproject.org/updates/FEDORA-2022-2bc333ccac