linux-kernel - [PATCH] arm64: irq: set the correct node for shadow call stack

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Date:   Wed, 13 Dec 2023 09:20:46 +0800
From:   Huang Shijie <shijie@...amperecomputing.com>
To:     catalin.marinas@....com
Cc:     patches@...erecomputing.com, will@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Huang Shijie <shijie@...amperecomputing.com>
Subject: [PATCH] arm64: irq: set the correct node for shadow call stack

The init_irq_stacks() has been changed to use the correct node:
https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/commit/?id=75b5e0bf90bf

The init_irq_scs() has the same issue with init_irq_stacks():
	cpu_to_node() is not initialized yet, it does not work.

This patch uses early_cpu_to_node() to set the init_irq_scs()
with the correct node.

Signed-off-by: Huang Shijie <shijie@...amperecomputing.com>
---
 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 9f253d8efe90..85087e2df564 100644
--- a/arch/arm64/kernel/irq.c
+++ b/arch/arm64/kernel/irq.c
@@ -48,7 +48,7 @@ static void init_irq_scs(void)
 
 	for_each_possible_cpu(cpu)
 		per_cpu(irq_shadow_call_stack_ptr, cpu) =
-			scs_alloc(cpu_to_node(cpu));
+			scs_alloc(early_cpu_to_node(cpu));
 }
 
 #ifdef CONFIG_VMAP_STACK
-- 
2.40.1