linux-kernel - Re: [PATCH] kprobes: Reduce preempt disable scope in check_kprobe_access

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Message-ID: <20241121080432.ysLlZsSP@linutronix.de>
Date: Thu, 21 Nov 2024 09:04:32 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Cc: Naveen N Rao <naveen@...nel.org>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Clark Williams <clrkwllms@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org, linux-rt-devel@...ts.linux.dev
Subject: Re: [PATCH] kprobes: Reduce preempt disable scope in
 check_kprobe_access_safe()

On 2024-11-21 08:38:08 [+0100], Thomas Weißschuh wrote:
…
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>

Reviewed-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

> diff --git a/kernel/kprobes.c b/kernel/kprobes.c
> index da59c68df8412c4662d39d3e286d516e8cee9a69..369020170e832a34ea9c05eda6693bded02ec505 100644
> --- a/kernel/kprobes.c
> +++ b/kernel/kprobes.c
> @@ -39,6 +39,7 @@
>  #include <linux/static_call.h>
>  #include <linux/perf_event.h>
>  #include <linux/execmem.h>
> +#include <linux/cleanup.h>

This hunk can be dropped. The definition for guard(preempt)() comes from
preempt.h.

>  #include <asm/sections.h>
>  #include <asm/cacheflush.h>

Sebastian