On Thu, 11 Sep 2014, Jiang Liu wrote:
> Cache destination CPU APIC ID into struct irq_cfg when assigning vector > for interrupt. Upper layer just needs to read the cached APIC ID instead > of calling apic->cpu_mask_to_apicid_and(), it helps to hide APIC driver > details from IOAPIC/HPET/MSI drivers.. > > Signed-off-by: Jiang Liu <[email protected]> > --- > arch/x86/include/asm/hw_irq.h | 1 + > arch/x86/kernel/apic/vector.c | 4 ++++ > 2 files changed, 5 insertions(+) > > diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h > index 7624fffc2822..3d51d74d6c01 100644 > --- a/arch/x86/include/asm/hw_irq.h > +++ b/arch/x86/include/asm/hw_irq.h > @@ -116,6 +116,7 @@ struct irq_data; > struct irq_cfg { > cpumask_var_t domain; > cpumask_var_t old_domain; > + unsigned int dest_apicid; > u8 vector; > u8 move_in_progress : 1; > #ifdef CONFIG_IRQ_REMAP > diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c > index 7562cb15b3bd..287ae4e8d500 100644 > --- a/arch/x86/kernel/apic/vector.c > +++ b/arch/x86/kernel/apic/vector.c > @@ -188,6 +188,10 @@ next: > } > free_cpumask_var(tmp_mask); Lacks a comment what this call is actually doing. > + if (!err) > + err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, > + &cfg->dest_apicid); > + Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
