cpu_asid_lock needs to be a real spinlock on preempt-rt. Convert it to
a raw_spinlock. No change for !RT kernels.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 arch/arm/mm/context.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Index: linux-2.6-tip/arch/arm/mm/context.c
===================================================================
--- linux-2.6-tip.orig/arch/arm/mm/context.c
+++ linux-2.6-tip/arch/arm/mm/context.c
@@ -14,7 +14,7 @@
 #include <asm/mmu_context.h>
 #include <asm/tlbflush.h>
 
-static DEFINE_SPINLOCK(cpu_asid_lock);
+static DEFINE_RAW_SPINLOCK(cpu_asid_lock);
 unsigned int cpu_last_asid = ASID_FIRST_VERSION;
 
 /*
@@ -32,7 +32,7 @@ void __new_context(struct mm_struct *mm)
 {
 	unsigned int asid;
 
-	spin_lock(&cpu_asid_lock);
+	raw_spin_lock(&cpu_asid_lock);
 	asid = ++cpu_last_asid;
 	if (asid == 0)
 		asid = cpu_last_asid = ASID_FIRST_VERSION;
@@ -54,7 +54,7 @@ void __new_context(struct mm_struct *mm)
 			dsb();
 		}
 	}
-	spin_unlock(&cpu_asid_lock);
+	raw_spin_unlock(&cpu_asid_lock);
 
 	cpumask_copy(mm_cpumask(mm), cpumask_of(smp_processor_id()));
 	mm->context.id = asid;