diff options
| author | Jacob Pan <jacob.jun.pan@linux.intel.com> | 2024-04-23 10:41:09 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-04-30 00:54:42 +0200 |
| commit | 6087c7f36ab293a06bc0bcf3857ed4d7eb1f9905 (patch) | |
| tree | 258e8220e557d73654be614320653c556e96a14a | |
| parent | 43650dcf6d6322ec2d0938bb51f755810ffa783a (diff) | |
x86/irq: Factor out handler invocation from common_interrupt()
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.com
| -rw-r--r-- | arch/x86/kernel/irq.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index dbb3a19b3004..d652b0481899 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -242,18 +242,10 @@ 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); @@ -268,7 +260,20 @@ 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); } |