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Commit 071c06cb authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Benjamin Herrenschmidt
Browse files

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: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent b8f87782

arch/powerpc/kernel/pmc.c

+5 −5
Original line number Diff line number Diff line
@@ -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);