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ARM: OMAP: make wakeupgen_lock raw

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When applying RT patch on top of Linux, spinlocks are
implemented as RT-mutexes, which means they are preemptable.

Current GIC implementation on OMAP is using a spinlock
to protect against preemption. As it turns out, we need
to convert that lock into a raw_spinlock so that OMAP's
interrupt controller works as expected after RT-patch
is applied.

This patch is simply to decrease the amount of changes
RT-team needs to carry out of tree. It doesn't cause any
changes in behavior.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Thomas Gleixner 2012-12-07 16:49:47 +02:00 committed by Tony Lindgren
parent 88b62b915b
commit aecb9e1422
1 changed files with 7 additions and 7 deletions
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14
arch/arm/mach-omap2/omap-wakeupgen.c
View File

@ -46,7 +46,7 @@
static void __iomem *wakeupgen_base;
static void __iomem *sar_base;
static DEFINE_SPINLOCK(wakeupgen_lock);
static DEFINE_RAW_SPINLOCK(wakeupgen_lock);
static unsigned int irq_target_cpu[MAX_IRQS];
static unsigned int irq_banks = MAX_NR_REG_BANKS;
static unsigned int max_irqs = MAX_IRQS;
@ -134,9 +134,9 @@ static void wakeupgen_mask(struct irq_data *d)
{
unsigned long flags;
spin_lock_irqsave(&wakeupgen_lock, flags);
raw_spin_lock_irqsave(&wakeupgen_lock, flags);
_wakeupgen_clear(d->irq, irq_target_cpu[d->irq]);
spin_unlock_irqrestore(&wakeupgen_lock, flags);
raw_spin_unlock_irqrestore(&wakeupgen_lock, flags);
}
/*
@ -146,9 +146,9 @@ static void wakeupgen_unmask(struct irq_data *d)
{
unsigned long flags;
spin_lock_irqsave(&wakeupgen_lock, flags);
raw_spin_lock_irqsave(&wakeupgen_lock, flags);
_wakeupgen_set(d->irq, irq_target_cpu[d->irq]);
spin_unlock_irqrestore(&wakeupgen_lock, flags);
raw_spin_unlock_irqrestore(&wakeupgen_lock, flags);
}
#ifdef CONFIG_HOTPLUG_CPU
@ -189,7 +189,7 @@ static void wakeupgen_irqmask_all(unsigned int cpu, unsigned int set)
{
unsigned long flags;
spin_lock_irqsave(&wakeupgen_lock, flags);
raw_spin_lock_irqsave(&wakeupgen_lock, flags);
if (set) {
_wakeupgen_save_masks(cpu);
_wakeupgen_set_all(cpu, WKG_MASK_ALL);
@ -197,7 +197,7 @@ static void wakeupgen_irqmask_all(unsigned int cpu, unsigned int set)
_wakeupgen_set_all(cpu, WKG_UNMASK_ALL);
_wakeupgen_restore_masks(cpu);
}
spin_unlock_irqrestore(&wakeupgen_lock, flags);
raw_spin_unlock_irqrestore(&wakeupgen_lock, flags);
}
#endif