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[210.128.90.14]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29601998eb6sm51062025ad.29.2025.11.04.23.43.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Nov 2025 23:43:38 -0800 (PST) From: Ryo Takakura To: will@kernel.org, ardb@kernel.org, bigeasy@linutronix.de, catalin.marinas@arm.com, clrkwllms@kernel.org, leitao@debian.org, mark.rutland@arm.com, rostedt@goodmis.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, ryotkkr98@gmail.com Subject: [PATCH v2] arm64: use SOFTIRQ_ON_OWN_STACK for enabling softirq stack Date: Wed, 5 Nov 2025 16:42:59 +0900 Message-Id: <20251105074259.209131-1-ryotkkr98@gmail.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Reviewed-by: Sebastian Andrzej Siewior Acked-by: Will Deacon --- Changes since v1: [1] https://lore.kernel.org/linux-rt-devel/20251013013508.74677-1-ryotkkr98= @gmail.com/ - Add by Sebastian. - Add by Will. --- 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 c0065a1d7..15dedb385 100644 --- a/arch/arm64/kernel/irq.c +++ b/arch/arm64/kernel/irq.c @@ -62,7 +62,7 @@ static void __init init_irq_stacks(void) } } =20 -#ifndef CONFIG_PREEMPT_RT +#ifdef CONFIG_SOFTIRQ_ON_OWN_STACK static void ____do_softirq(struct pt_regs *regs) { __do_softirq(); --=20 2.34.1