From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1238F32ABF7; Tue, 4 Nov 2025 13:58:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762264699; cv=none; b=VB/TTAU0mON/DMkOeMFwkD+rr2580pPvY7Z1PZkGNdeAyq6um9RZBNZaHt2RpDA5V+4w9xGbVCzS3q2HNve/aPy4dKxWhe+zE3xpoVAMjAk2wvTgNteHIBl2WKVdM9cAGYUOIkMsDVAXWjuCdzLjefWHsoFMj4H6hUt3dXt4Hzc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762264699; c=relaxed/simple; bh=4K46elwz2t41thzEDIlkodjmZEybmO5RrzNgtf0xipA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=hXKJ3KNaSx36TbN5giQa1cBap1fkTRQO+0DbjdX3vanPahP+r6NGa4whaRXCHYtzlApbJx2FyeQYzaVpoaZV+p/fF4I5ELjjVZ9fRf5L0Cn3dy/IMOHT7y2OiDAgGBr1/DeOGAOo2xSffMA1PibyOTczOlaCI50guF/LEY/WAHg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FTuYizHQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FTuYizHQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F1C9C4CEF7; Tue, 4 Nov 2025 13:58:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762264698; bh=4K46elwz2t41thzEDIlkodjmZEybmO5RrzNgtf0xipA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FTuYizHQP/YaIbgF3vqNbGgvB8bHF6TItco2OMyJ9evUpo+GBr20DxE5Jer8+p4K1 Q+hFVJhn3gpVicQ2H0Ofyp6uCJN9ymtHFPPLDjxYfofm6lejPtS8XJgwAO5RL0xfrh 9nW/y6m3o1sA+lBbGYZwON+Afz1yEkvdQnsCyZWZFCuBjMh861BJOgw4ddIegP8vWw CDy27YlcgnSzhLSu0KN0TojEMMqpNqXy0n7zprfWIzmZl2LTtr0cVzEatQl7Bl8m/u lzMahpVNdy0kWug9HG1JgJqN1YX431c9LR57rP8r6A6CK5d+uRJpVZCbr+WC/wtS7y aFF7c7dek1JVQ== Date: Tue, 4 Nov 2025 13:58:13 +0000 From: Will Deacon To: Ryo Takakura Cc: catalin.marinas@arm.com, bigeasy@linutronix.de, clrkwllms@kernel.org, rostedt@goodmis.org, leitao@debian.org, mark.rutland@arm.com, ardb@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev Subject: Re: [PATCH] arm64: use SOFTIRQ_ON_OWN_STACK for enabling softirq stack Message-ID: References: <20251013013508.74677-1-ryotkkr98@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251013013508.74677-1-ryotkkr98@gmail.com> On Mon, Oct 13, 2025 at 01:35:08AM +0000, Ryo Takakura wrote: > For those architectures with HAVE_SOFTIRQ_ON_OWN_STACK use > their dedicated softirq stack when !PREEMPT_RT. This condition > is ensured by SOFTIRQ_ON_OWN_STACK. > > Let arm64 use SOFTIRQ_ON_OWN_STACK as well to select its > usage of the stack. > > Signed-off-by: Ryo Takakura > --- > arch/arm64/kernel/irq.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c > index c0065a1d77cf..15dedb385b9e 100644 > --- a/arch/arm64/kernel/irq.c > +++ b/arch/arm64/kernel/irq.c > @@ -62,7 +62,7 @@ static void __init init_irq_stacks(void) > } > } > > -#ifndef CONFIG_PREEMPT_RT > +#ifdef CONFIG_SOFTIRQ_ON_OWN_STACK > static void ____do_softirq(struct pt_regs *regs) > { > __do_softirq(); Acked-by: Will Deacon Will