linux-kernel - Re: [PATCH v2] LoongArch: signal.c: add header file to fix build error

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Date: Sat, 23 Dec 2023 18:27:59 +0800
From: Huacai Chen <chenhuacai@...nel.org>
To: Randy Dunlap <rdunlap@...radead.org>
Cc: linux-kernel@...r.kernel.org, WANG Xuerui <kernel@...0n.name>, 
	loongarch@...ts.linux.dev, Kent Overstreet <kent.overstreet@...il.com>
Subject: Re: [PATCH v2] LoongArch: signal.c: add header file to fix build error

On Fri, Dec 22, 2023 at 12:59 PM Huacai Chen <chenhuacai@...nel.org> wrote:
>
> Hi, Randy,
>
> I cannot reproduce it with the default config file.
Oh, I know, this error only occurs in linux-next, but I think this
patch should be squashed into "rseq: Split out rseq.h from sched.h".
Or as a fix applied to the bcachefs tree rather than the loongarch
tree.

Huacai

>
> Huacai
>
> On Fri, Dec 22, 2023 at 12:46 PM Randy Dunlap <rdunlap@...radead.org> wrote:
> >
> > loongarch's signal.c uses rseq_signal_deliver() so it should
> > pull in the appropriate header to prevent a build error:
> >
> > ../arch/loongarch/kernel/signal.c: In function 'handle_signal':
> > ../arch/loongarch/kernel/signal.c:1034:9: error: implicit declaration of function 'rseq_signal_deliver' [-Werror=implicit-function-declaration]
> >  1034 |         rseq_signal_deliver(ksig, regs);
> >       |         ^~~~~~~~~~~~~~~~~~~
> >
> > Fixes: b74baf4ad05b ("LoongArch: Add signal handling support")
> > Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> > Cc: Huacai Chen <chenhuacai@...nel.org>
> > Cc: WANG Xuerui <kernel@...0n.name>
> > Cc: loongarch@...ts.linux.dev
> > Cc: Kent Overstreet <kent.overstreet@...il.com>
> > ---
> > v2: repair Cc: list
> >
> >  arch/loongarch/kernel/signal.c |    1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff -- a/arch/loongarch/kernel/signal.c b/arch/loongarch/kernel/signal.c
> > --- a/arch/loongarch/kernel/signal.c
> > +++ b/arch/loongarch/kernel/signal.c
> > @@ -15,6 +15,7 @@
> >  #include <linux/context_tracking.h>
> >  #include <linux/entry-common.h>
> >  #include <linux/irqflags.h>
> > +#include <linux/rseq.h>
> >  #include <linux/sched.h>
> >  #include <linux/mm.h>
> >  #include <linux/personality.h>