linux-kernel - Re: [PATCH 42/50] sem: Split out sem

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Date: Tue, 2 Jan 2024 09:47:51 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	linux-fsdevel@...r.kernel.org, tglx@...utronix.de, x86@...nel.org, 
	tj@...nel.org, peterz@...radead.org, mathieu.desnoyers@...icios.com, 
	paulmck@...nel.org, keescook@...omium.org, dave.hansen@...ux.intel.com, 
	mingo@...hat.com, will@...nel.org, longman@...hat.com, boqun.feng@...il.com, 
	brauner@...nel.org
Subject: Re: [PATCH 42/50] sem: Split out sem_types.h

Hi Kent,

On Wed, Dec 20, 2023 at 10:39 PM Kent Overstreet
<kent.overstreet@...ux.dev> wrote:
> On Wed, Dec 20, 2023 at 12:53:46PM +0100, Geert Uytterhoeven wrote:
> > On Sat, Dec 16, 2023 at 4:37 AM Kent Overstreet
> > <kent.overstreet@...ux.dev> wrote:
> > > More sched.h dependency pruning.
> > >
> > > Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>
> >
> > Thanks for your patch, which is now commit eb72d60ccaed883a ("sem:
> > Split out sem_types.h") in next-20231220.
> >
> > $ make ARCH=m68k defconfig arch/m68k/kernel/asm-offsets.i
> > *** Default configuration is based on 'multi_defconfig'
> > #
> > # No change to .config
> > #
> >   UPD     include/config/kernel.release
> >   UPD     include/generated/utsrelease.h
> >   CC      arch/m68k/kernel/asm-offsets.s
> > In file included from arch/m68k/kernel/asm-offsets.c:15:
> > ./include/linux/sched.h:551:3: error: conflicting types for
> > ‘____cacheline_aligned’
> >   551 | } ____cacheline_aligned;
> >       |   ^~~~~~~~~~~~~~~~~~~~~
> > ./include/linux/sched.h:509:3: note: previous declaration of
> > ‘____cacheline_aligned’ was here
> >   509 | } ____cacheline_aligned;
> >       |   ^~~~~~~~~~~~~~~~~~~~~
> > make[3]: *** [scripts/Makefile.build:116:
> > arch/m68k/kernel/asm-offsets.s] Error 1
> > make[2]: *** [Makefile:1191: prepare0] Error 2
> > make[1]: *** [Makefile:350: __build_one_by_one] Error 2
> > make: *** [Makefile:234: __sub-make] Error 2
>
> Is this a build failure on linux-next, or that specific commit?

On this specific commit.

> It looks like this should be fixed in a later commit that includes
> cache.h in sched.h; I'll move that include back to this patch.

Indeed. The robots reported a build failure, and bisection arrived
at this (different) build failure first.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds