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ARC: [SMP] unify cpu private IRQ requests (TIMER/IPI)

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The current cpu-private IRQ registration is ugly as it requires need to
expose arch_unmask_irq() outside of intc code.
So switch to percpu IRQ APIs:
  -request_percpu_irq [boot core]
  -enable_percpu_irq  [all cores]

Encapsulated in helper arc_request_percpu_irq()

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta
2014-05-07 15:25:10 +05:30
parent 4c834452aa
commit 2b75c0f93e
4 changed files with 37 additions and 26 deletions
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15
arch/arc/kernel/smp.c
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@@ -136,7 +136,7 @@ void start_kernel_secondary(void)
pr_info("## CPU%u LIVE ##: Executing Code...\n", cpu);
if (machine_desc->init_smp)
machine_desc->init_smp(smp_processor_id());
machine_desc->init_smp(cpu);
arc_local_timer_setup();
@@ -338,18 +338,11 @@ irqreturn_t do_IPI(int irq, void *dev_id)
*/
static DEFINE_PER_CPU(int, ipi_dev);
static struct irqaction arc_ipi_irq = {
.name = "IPI Interrupt",
.flags = IRQF_PERCPU,
.handler = do_IPI,
};
int smp_ipi_irq_setup(int cpu, int irq)
{
if (!cpu)
return setup_irq(irq, &arc_ipi_irq);
else
arch_unmask_irq(irq);
int *dev = per_cpu_ptr(&ipi_dev, cpu);
arc_request_percpu_irq(irq, cpu, do_IPI, "IPI Interrupt", dev);
return 0;
}