[PATCH v5 27/31] ARM: irq: Add irqstack helper
From: Linus Walleij <hidden>
Date: 2025-02-25 09:55:32
Also in:
lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Add a helper to dispatch IRQ execution to the IRQ stack: call_on_irq_stack() so we can explicitly issue handle_irq() on the IRQ stack from a C program. Cc: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Linus Walleij <redacted> --- arch/arm/kernel/irq.c | 6 ++++++ arch/arm/kernel/irq.h | 2 ++ 2 files changed, 8 insertions(+)
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index e1993e28a9ecfd80b55b2677253ac582467e6c14..f99d6b24d8ff56f901e4a817c61a1e57b7e532cc 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c@@ -43,6 +43,7 @@ #include <asm/mach/irq.h> #include <asm/mach/time.h> +#include "irq.h" #include "reboot.h" unsigned long irq_err_count;
@@ -71,6 +72,11 @@ static void __init init_irq_stacks(void) } } +void call_on_irq_stack(void (*fn)(void *), void *arg) +{ + call_with_stack(fn, arg, __this_cpu_read(irq_stack_ptr)); +} + #ifdef CONFIG_SOFTIRQ_ON_OWN_STACK static void ____do_softirq(void *arg) {
diff --git a/arch/arm/kernel/irq.h b/arch/arm/kernel/irq.h
new file mode 100644
index 0000000000000000000000000000000000000000..80dd5bfe6403d68fc62fab30666d5645748d329f
--- /dev/null
+++ b/arch/arm/kernel/irq.h@@ -0,0 +1,2 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +void call_on_irq_stack(void (*fn)(void *), void *arg);
--
2.48.1