linux-kernel - Re: [PATCH v2 REPOST] asm-generic: Conditionally enable do_softirq_own

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Message-ID: <YxmOMxxeC/h7L1EW@linutronix.de>
Date:   Thu, 8 Sep 2022 08:39:47 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     linux-arch <linux-arch@...r.kernel.org>,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v2 REPOST] asm-generic: Conditionally enable
 do_softirq_own_stack() via Kconfig.

On 2022-08-25 10:25:06 [+0200], To Arnd Bergmann wrote:
> Remove the CONFIG_PREEMPT_RT symbol from the ifdef around
> do_softirq_own_stack() and move it to Kconfig instead.
> 
> Enable softirq stacks based on SOFTIRQ_ON_OWN_STACK which depends on
> HAVE_SOFTIRQ_ON_OWN_STACK and its default value is set to !PREEMPT_RT.
> This ensures that softirq stacks are not used on PREEMPT_RT and avoids
> a 'select' statement on an option which has a 'depends' statement.
> 
> Link: https://lore.kernel.org/YvN5E%2FPrHfUhggr7@linutronix.de
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> ---
> 
> Arnd, could you please route it via your tree? 
> 
> v1…v2:
>    - Use "def_bool HAVE_SOFTIRQ_ON_OWN_STACK && !PREEMPT_RT"

a gentle *ping*

Sebastian