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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 <tglx@linutronix.de>
Cc: stable-rt@vger.kernel.org
This commit is contained in:
Thomas Gleixner 2012-09-27 11:11:46 +02:00 committed by Alibek Omarov
parent 59a5ea7360
commit a5e1b6d169
1 changed files with 2 additions and 2 deletions
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4
mm/page_alloc.c
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@ -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)