From ad8092ec04d2fa8788811972fca5f07ad9dba860 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 27 Sep 2012 11:11:46 +0200 Subject: mm: page_alloc: Use local_lock_on() instead of plain spinlock The plain spinlock while sufficient does not update the local_lock internals. Use a proper local_lock function instead to ease debugging. Signed-off-by: Thomas Gleixner Cc: stable-rt@vger.kernel.org diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 280d015..4cf25ba 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -236,9 +236,9 @@ static DEFINE_LOCAL_IRQ_LOCK(pa_lock); #ifdef CONFIG_PREEMPT_RT_BASE # define cpu_lock_irqsave(cpu, flags) \ - spin_lock_irqsave(&per_cpu(pa_lock, cpu).lock, flags) + local_lock_irqsave_on(pa_lock, flags, cpu) # define cpu_unlock_irqrestore(cpu, flags) \ - spin_unlock_irqrestore(&per_cpu(pa_lock, cpu).lock, flags) + local_unlock_irqrestore_on(pa_lock, flags, cpu) #else # define cpu_lock_irqsave(cpu, flags) local_irq_save(flags) # define cpu_unlock_irqrestore(cpu, flags) local_irq_restore(flags) -- cgit v0.10.2