[PATCH 4/8] arm64: remove CONFIG_VMAP_STACK conditionals from irq stack setup
From: Breno Leitao <leitao@debian.org>
Date: 2025-07-07 16:01:13
Also in:
linux-efi, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
With VMAP_STACK always enabled on arm64, drop the CONFIG_VMAP_STACK checks and legacy irq stack allocation from arch/arm64/kernel/irq.c. The code now unconditionally uses the VMAP_STACK path for irq stack initialization, simplifying the logic. Signed-off-by: Breno Leitao <leitao@debian.org> --- arch/arm64/kernel/irq.c | 13 ------------- 1 file changed, 13 deletions(-)
diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c
index 85087e2df564..c0065a1d77cf 100644
--- a/arch/arm64/kernel/irq.c
+++ b/arch/arm64/kernel/irq.c@@ -51,7 +51,6 @@ static void init_irq_scs(void) scs_alloc(early_cpu_to_node(cpu)); } -#ifdef CONFIG_VMAP_STACK static void __init init_irq_stacks(void) { int cpu;
@@ -62,18 +61,6 @@ static void __init init_irq_stacks(void) per_cpu(irq_stack_ptr, cpu) = p; } } -#else -/* irq stack only needs to be 16 byte aligned - not IRQ_STACK_SIZE aligned. */ -DEFINE_PER_CPU_ALIGNED(unsigned long [IRQ_STACK_SIZE/sizeof(long)], irq_stack); - -static void init_irq_stacks(void) -{ - int cpu; - - for_each_possible_cpu(cpu) - per_cpu(irq_stack_ptr, cpu) = per_cpu(irq_stack, cpu); -} -#endif #ifndef CONFIG_PREEMPT_RT static void ____do_softirq(struct pt_regs *regs)
--
2.47.1