[PATCH 6.1 213/219] arm64: irq: set the correct node for shadow call stack

Greg Kroah-Hartman
2024-02-03T04:11:11Z

From: Huang Shijie <shijie@os.amperecomputing.com>

commit 7b1a09e44dc64f4f5930659b6d14a27183c00705 upstream.

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@os.amperecomputing.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20231213012046.12014-1-shijie@os.amperecomputing.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm64/kernel/irq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm64/kernel/irq.c
+++ b/arch/arm64/kernel/irq.c
@@ -47,7 +47,7 @@ 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