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xen/smp/pvhvm: Don't initialize IRQ_WORKER as we are using the native one.

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There is no need to use the PV version of the IRQ_WORKER mechanism
as under PVHVM we are using the native version. The native
version is using the SMP API.

They just sit around unused:

  69:          0          0  xen-percpu-ipi       irqwork0
  83:          0          0  xen-percpu-ipi       irqwork1

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2013-04-16 14:37:04 -04:00
parent 70dd4998cb
commit 27d8b207f0
1 changed files with 12 additions and 1 deletions
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13
arch/x86/xen/smp.c
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@ -144,6 +144,13 @@ static int xen_smp_intr_init(unsigned int cpu)
goto fail;
per_cpu(xen_callfuncsingle_irq, cpu) = rc;
/*
* The IRQ worker on PVHVM goes through the native path and uses the
* IPI mechanism.
*/
if (xen_hvm_domain())
return 0;
callfunc_name = kasprintf(GFP_KERNEL, "irqwork%d", cpu);
rc = bind_ipi_to_irqhandler(XEN_IRQ_WORK_VECTOR,
cpu,
@ -167,6 +174,9 @@ static int xen_smp_intr_init(unsigned int cpu)
if (per_cpu(xen_callfuncsingle_irq, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu),
NULL);
if (xen_hvm_domain())
return rc;
if (per_cpu(xen_irq_work, cpu) >= 0)
unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
@ -661,7 +671,8 @@ static void xen_hvm_cpu_die(unsigned int cpu)
unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu), NULL);
unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
if (!xen_hvm_domain())
unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL);
xen_uninit_lock_cpu(cpu);
xen_teardown_timer(cpu);
native_cpu_die(cpu);