From: Jacob Pan jacob.jun.pan@linux.intel.com
commit 6087c7f36ab293a06bc0bcf3857ed4d7eb1f9905 upstream.
Prepare for calling external interrupt handlers directly from the posted MSI demultiplexing loop. Extract the common code from common_interrupt() to avoid code duplication.
Signed-off-by: Jacob Pan jacob.jun.pan@linux.intel.com Signed-off-by: Thomas Gleixner tglx@linutronix.de Link: https://lore.kernel.org/r/20240423174114.526704-8-jacob.jun.pan@linux.intel.... Signed-off-by: Jinjie Ruan ruanjinjie@huawei.com --- arch/x86/kernel/irq.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index 439fdb3f5fdf..11d7233397df 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -235,18 +235,10 @@ static __always_inline void handle_irq(struct irq_desc *desc, __handle_irq(desc, regs); }
-/* - * common_interrupt() handles all normal device IRQ's (the special SMP - * cross-CPU interrupts have their own entry points). - */ -DEFINE_IDTENTRY_IRQ(common_interrupt) +static __always_inline void call_irq_handler(int vector, struct pt_regs *regs) { - struct pt_regs *old_regs = set_irq_regs(regs); struct irq_desc *desc;
- /* entry code tells RCU that we're not quiescent. Check it. */ - RCU_LOCKDEP_WARN(!rcu_is_watching(), "IRQ failed to wake up RCU"); - desc = __this_cpu_read(vector_irq[vector]); if (likely(!IS_ERR_OR_NULL(desc))) { handle_irq(desc, regs); @@ -261,7 +253,20 @@ DEFINE_IDTENTRY_IRQ(common_interrupt) __this_cpu_write(vector_irq[vector], VECTOR_UNUSED); } } +} + +/* + * common_interrupt() handles all normal device IRQ's (the special SMP + * cross-CPU interrupts have their own entry points). + */ +DEFINE_IDTENTRY_IRQ(common_interrupt) +{ + struct pt_regs *old_regs = set_irq_regs(regs); + + /* entry code tells RCU that we're not quiescent. Check it. */ + RCU_LOCKDEP_WARN(!rcu_is_watching(), "IRQ failed to wake up RCU");
+ call_irq_handler(vector, regs); set_irq_regs(old_regs); }