linux-kernel - Re: [PATCH 50/50] Kill sched.h dependency on rcupdate.h

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Message-ID: <20231220213957.zbslehrx4zkkbabq@moria.home.lan>
Date: Wed, 20 Dec 2023 16:39:57 -0500
From: Kent Overstreet <kent.overstreet@...ux.dev>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
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 50/50] Kill sched.h dependency on rcupdate.h

On Wed, Dec 20, 2023 at 12:59:44PM +0100, Geert Uytterhoeven wrote:
> Hi Kent,
> 
> On Sat, Dec 16, 2023 at 4:39 AM Kent Overstreet
> <kent.overstreet@...ux.dev> wrote:
> > by moving cond_resched_rcu() to rcupdate.h, we can kill another big
> > sched.h dependency.
> >
> > Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>
> 
> Thanks for your patch, which is now commit dc00f26faea81dc0 ("Kill
> sched.h dependency on rcupdate.h") in next-20231220.
> 
> Reported-by: noreply@...erman.id.au
> 
> $ 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 ./include/asm-generic/bug.h:7,
>                  from ./arch/m68k/include/asm/bug.h:32,
>                  from ./include/linux/bug.h:5,
>                  from ./include/linux/thread_info.h:13,
>                  from ./arch/m68k/include/asm/processor.h:11,
>                  from ./include/linux/sched.h:13,
>                  from arch/m68k/kernel/asm-offsets.c:15:
> ./arch/m68k/include/asm/processor.h: In function ‘set_fc’:
> ./arch/m68k/include/asm/processor.h:91:15: error: implicit declaration
> of function ‘in_interrupt’ [-Werror=implicit-function-declaration]
>    91 |  WARN_ON_ONCE(in_interrupt());
>       |               ^~~~~~~~~~~~
> ./include/linux/once_lite.h:28:27: note: in definition of macro
> ‘DO_ONCE_LITE_IF’
>    28 |   bool __ret_do_once = !!(condition);   \
>       |                           ^~~~~~~~~
> ./arch/m68k/include/asm/processor.h:91:2: note: in expansion of macro
> ‘WARN_ON_ONCE’
>    91 |  WARN_ON_ONCE(in_interrupt());
>       |  ^~~~~~~~~~~~
> cc1: some warnings being treated as errors
> 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

Applying this fix:

commit 0d7bdfe9726b275c7e9398047763a144c790b575
Author: Kent Overstreet <kent.overstreet@...ux.dev>
Date:   Wed Dec 20 16:39:21 2023 -0500

    m68k: Fix missing include
    
    Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>

diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index 7a2da780830b..8f2676c3a988 100644
--- a/arch/m68k/include/asm/processor.h
+++ b/arch/m68k/include/asm/processor.h
@@ -8,6 +8,7 @@
 #ifndef __ASM_M68K_PROCESSOR_H
 #define __ASM_M68K_PROCESSOR_H
 
+#include <linux/preempt.h>
 #include <linux/thread_info.h>
 #include <asm/fpu.h>
 #include <asm/ptrace.h>