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| author | Thomas Gleixner <tglx@linutronix.de> | 2015-08-02 22:38:27 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-08-06 00:14:59 +0200 |
| commit | a782a7e46bb50822fabfeb7271605762a59c86df (patch) | |
| tree | a1b4d1798fc5b87f255716f07a170795cf5d5600 /arch/x86/kernel/irq_32.c | |
| parent | genirq: Provide irq_desc_has_action (diff) | |
| download | linux-a782a7e46bb50822fabfeb7271605762a59c86df.tar.xz linux-a782a7e46bb50822fabfeb7271605762a59c86df.zip | |
x86/irq: Store irq descriptor in vector array
We can spare the irq_desc lookup in the interrupt entry code if we
store the descriptor pointer in the vector array instead the interrupt
number.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Link: http://lkml.kernel.org/r/20150802203609.717724106@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/irq_32.c')
| -rw-r--r-- | arch/x86/kernel/irq_32.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index cd74f5978ab9..217b01388038 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -148,21 +148,20 @@ void do_softirq_own_stack(void) call_on_stack(__do_softirq, isp); } -bool handle_irq(unsigned irq, struct pt_regs *regs) +bool handle_irq(struct irq_desc *desc, struct pt_regs *regs) { - struct irq_desc *desc; + unsigned int irq = irq_desc_get_irq(desc); int overflow; overflow = check_stack_overflow(); - desc = irq_to_desc(irq); - if (unlikely(!desc)) + if (IS_ERR_OR_NULL(desc)) return false; if (user_mode(regs) || !execute_on_irq_stack(overflow, desc, irq)) { if (unlikely(overflow)) print_stack_overflow(); - desc->handle_irq(irq, desc); + generic_handle_irq_desc(irq, desc); } return true; |