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xen: disable PV spinlocks on HVM 

PV spinlocks cannot possibly work with the current code because they are
enabled after pvops patching has already been done, and because PV
spinlocks use a different data structure than native spinlocks so we
cannot switch between them dynamically. A spinlock that has been taken
once by the native code (__ticket_spin_lock) cannot be taken by
__xen_spin_lock even after it has been released.

Reported-and-Tested-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Stefano Stabellini 2011-09-06 17:41:47 +01:00 committed by Konrad Rzeszutek Wilk
parent ed467e69f1
commit f10cd522c5
1 changed files with 0 additions and 1 deletions
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arch/x86/xen/smp.c
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@ -532,7 +532,6 @@ static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)
WARN_ON(xen_smp_intr_init(0));
xen_init_lock_cpu(0);
xen_init_spinlocks();
}
static int __cpuinit xen_hvm_cpu_up(unsigned int cpu)