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| author | Mark Rutland <mark.rutland@arm.com> | 2021-10-20 11:24:06 +0100 |
|---|---|---|
| committer | Mark Rutland <mark.rutland@arm.com> | 2021-10-25 10:05:27 +0100 |
| commit | a1b09501971435ef213251891753afb0d7f3d27a (patch) | |
| tree | eadab2b1aef05e291de205bca2f17cab67871f86 /include/linux/irq.h | |
| parent | 76adc5be6f505d0c137b210a95ad00dbd089473d (diff) | |
| download | lwn-a1b09501971435ef213251891753afb0d7f3d27a.tar.gz lwn-a1b09501971435ef213251891753afb0d7f3d27a.zip | |
irq: add generic_handle_arch_irq()
Several architectures select GENERIC_IRQ_MULTI_HANDLER and branch to
handle_arch_irq() without performing any entry accounting.
Add a generic wrapper to handle the common irqentry work when invoking
handle_arch_irq(). Where an architecture needs to perform some entry
accounting itself, it will need to invoke handle_arch_irq() itself.
In subsequent patches it will become the responsibilty of the entry code
to set the irq regs when entering an IRQ (rather than deferring this to
an irqchip handler), so generic_handle_arch_irq() is made to set the irq
regs now. This can be redundant in some cases, but is never harmful as
saving/restoring the old regs nests safely.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Guo Ren <guoren@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/irq.h')
| -rw-r--r-- | include/linux/irq.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index c8293c817646..988c225eef2d 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -1261,6 +1261,7 @@ int __init set_handle_irq(void (*handle_irq)(struct pt_regs *)); * top-level IRQ handler. */ extern void (*handle_arch_irq)(struct pt_regs *) __ro_after_init; +asmlinkage void generic_handle_arch_irq(struct pt_regs *regs); #else #ifndef set_handle_irq #define set_handle_irq(handle_irq) \ |