powerpc: Convert pmc_owner_lock to raw_spinlock

pmc_owner_lock needs to be a real spinlock in RT. Convert it to
raw_spinlock.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/kernel/pmc.c b/arch/powerpc/kernel/pmc.c
index 0516e2d..461499b 100644 (file)
--- a/arch/powerpc/kernel/pmc.c
+++ b/arch/powerpc/kernel/pmc.c
@@ -37,7 +37,7 @@ static void dummy_perf(struct pt_regs *regs)
 }
 
 
-static DEFINE_SPINLOCK(pmc_owner_lock);
+static DEFINE_RAW_SPINLOCK(pmc_owner_lock);
 static void *pmc_owner_caller; /* mostly for debugging */
 perf_irq_t perf_irq = dummy_perf;
 
@@ -45,7 +45,7 @@ int reserve_pmc_hardware(perf_irq_t new_perf_irq)
 {
        int err = 0;
 
-       spin_lock(&pmc_owner_lock);
+       raw_spin_lock(&pmc_owner_lock);
 
        if (pmc_owner_caller) {
                printk(KERN_WARNING "reserve_pmc_hardware: "
@@ -59,21 +59,21 @@ int reserve_pmc_hardware(perf_irq_t new_perf_irq)
        perf_irq = new_perf_irq ? new_perf_irq : dummy_perf;
 
  out:
-       spin_unlock(&pmc_owner_lock);
+       raw_spin_unlock(&pmc_owner_lock);
        return err;
 }
 EXPORT_SYMBOL_GPL(reserve_pmc_hardware);
 
 void release_pmc_hardware(void)
 {
-       spin_lock(&pmc_owner_lock);
+       raw_spin_lock(&pmc_owner_lock);
 
        WARN_ON(! pmc_owner_caller);
 
        pmc_owner_caller = NULL;
        perf_irq = dummy_perf;
 
-       spin_unlock(&pmc_owner_lock);
+       raw_spin_unlock(&pmc_owner_lock);
 }
 EXPORT_SYMBOL_GPL(release_pmc_hardware);