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Revert "xen/spinlock: Disable IRQ spinlock (PV) allocation on PVHVM" 

This reverts commit 70dd4998cb.

Now that the bugs have been resolved we can re-enable the
PV ticketlock implementation under PVHVM Xen guests.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2013-08-26 14:28:50 -04:00
parent 3310bbedac
commit fb78e58c27
1 changed files with 0 additions and 20 deletions
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20
arch/x86/xen/spinlock.c
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@ -230,13 +230,6 @@ void xen_init_lock_cpu(int cpu)
WARN(per_cpu(lock_kicker_irq, cpu) >= 0, "spinlock on CPU%d exists on IRQ%d!\n",
cpu, per_cpu(lock_kicker_irq, cpu));
/*
* See git commit f10cd522c5fbfec9ae3cc01967868c9c2401ed23
* (xen: disable PV spinlocks on HVM)
*/
if (xen_hvm_domain())
return;
name = kasprintf(GFP_KERNEL, "spinlock%d", cpu);
irq = bind_ipi_to_irqhandler(XEN_SPIN_UNLOCK_VECTOR,
cpu,
@ -256,13 +249,6 @@ void xen_init_lock_cpu(int cpu)
void xen_uninit_lock_cpu(int cpu)
{
/*
* See git commit f10cd522c5fbfec9ae3cc01967868c9c2401ed23
* (xen: disable PV spinlocks on HVM)
*/
if (xen_hvm_domain())
return;
if (!xen_pvspin)
return;
@ -275,12 +261,6 @@ void xen_uninit_lock_cpu(int cpu)
void __init xen_init_spinlocks(void)
{
/*
* See git commit f10cd522c5fbfec9ae3cc01967868c9c2401ed23
* (xen: disable PV spinlocks on HVM)
*/
if (xen_hvm_domain())
return;
if (!xen_pvspin) {
printk(KERN_DEBUG "xen: PV spinlocks disabled\n");