linux-kernel - Re: [PATCH 4/5] s390/irq,nmi: do not include <linux/vtime.h> header

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Date: Mon, 29 Jan 2024 10:51:44 +0100
From: Heiko Carstens <hca@...ux.ibm.com>
To: Alexander Gordeev <agordeev@...ux.ibm.com>
Cc: Frederic Weisbecker <frederic@...nel.org>, Ingo Molnar <mingo@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Vasily Gorbik <gor@...ux.ibm.com>, linux-kernel@...r.kernel.org,
        linux-s390@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 4/5] s390/irq,nmi: do not include <linux/vtime.h> header

On Sun, Jan 28, 2024 at 08:58:53PM +0100, Alexander Gordeev wrote:
> update_timer_sys() and update_timer_mcck() are inlines used for
> CPU time accounting from the interrupt and machine-check handlers.
> These routines are specific to s390 architecture, but declared
> via <linux/vtime.h> header, which in turn inludes <asm/vtime.h>.
> Avoid the extra loop and include <asm/vtime.h> header directly.
> 
> Signed-off-by: Alexander Gordeev <agordeev@...ux.ibm.com>
> ---
>  arch/s390/kernel/irq.c | 1 +
>  arch/s390/kernel/nmi.c | 1 +
>  2 files changed, 2 insertions(+)
..
> +++ b/arch/s390/kernel/irq.c
> +#include <asm/vtime.h>
..
> +++ b/arch/s390/kernel/nmi.c
> +#include <asm/vtime.h>

It is confusing when the patch subject is "do not include.." and all
what this patch is doing is to add two includes. I see what this is
doing: getting rid of the implicit include of asm/vtime.h most likely
via linux/hardirq.h, but that's not very obvious.

Anyway:
Acked-by: Heiko Carstens <hca@...ux.ibm.com>