linux-kernel - Re: [PATCH] irq_work: consolidate arch_irq_work

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Date:   Wed, 17 May 2023 16:08:12 +0200
From:   Alexander Gordeev <agordeev@...ux.ibm.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Guo Ren <guoren@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-csky@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
        linux-s390@...r.kernel.org
Subject: Re: [PATCH] irq_work: consolidate arch_irq_work_raise prototypes

On Tue, May 16, 2023 at 10:02:31PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The prototype was hidden on x86, which causes a warning:
> 
> kernel/irq_work.c:72:13: error: no previous prototype for 'arch_irq_work_raise' [-Werror=missing-prototypes]
> 
> Fix this by providing it in only one place that is always visible.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  arch/arm/include/asm/irq_work.h     | 2 --
>  arch/arm64/include/asm/irq_work.h   | 2 --
>  arch/csky/include/asm/irq_work.h    | 2 +-
>  arch/powerpc/include/asm/irq_work.h | 1 -
>  arch/riscv/include/asm/irq_work.h   | 2 +-
>  arch/s390/include/asm/irq_work.h    | 2 --
>  arch/x86/include/asm/irq_work.h     | 1 -
>  include/linux/irq_work.h            | 3 +++
>  8 files changed, 5 insertions(+), 10 deletions(-)

...

> diff --git a/arch/s390/include/asm/irq_work.h b/arch/s390/include/asm/irq_work.h
> index 603783766d0a..f00c9f610d5a 100644
> --- a/arch/s390/include/asm/irq_work.h
> +++ b/arch/s390/include/asm/irq_work.h
> @@ -7,6 +7,4 @@ static inline bool arch_irq_work_has_interrupt(void)
>  	return true;
>  }
>  
> -void arch_irq_work_raise(void);
> -
>  #endif /* _ASM_S390_IRQ_WORK_H */

...

> diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h
> index 8cd11a223260..136f2980cba3 100644
> --- a/include/linux/irq_work.h
> +++ b/include/linux/irq_work.h
> @@ -66,6 +66,9 @@ void irq_work_sync(struct irq_work *work);
>  void irq_work_run(void);
>  bool irq_work_needs_cpu(void);
>  void irq_work_single(void *arg);
> +
> +void arch_irq_work_raise(void);
> +
>  #else
>  static inline bool irq_work_needs_cpu(void) { return false; }
>  static inline void irq_work_run(void) { }

For s390:

Reviewed-by: Alexander Gordeev <agordeev@...ux.ibm.com>