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Commit 109d89ca authored by Russell King's avatar Russell King Committed by Russell King
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[PATCH] ARM: Allow register_undef_hook to be called with IRQs off 



Preserve the interrupt status across a call to register_undef_hook.
This allows it to be called while interrupts are disabled.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 54ea06f6

arch/arm/kernel/traps.c

+8 −4
Original line number Diff line number Diff line
@@ -248,16 +248,20 @@ static DEFINE_SPINLOCK(undef_lock); 


void register_undef_hook(struct undef_hook *hook)

{

	spin_lock_irq(&undef_lock);

	unsigned long flags;



	spin_lock_irqsave(&undef_lock, flags);

	list_add(&hook->node, &undef_hook);

	spin_unlock_irq(&undef_lock);

	spin_unlock_irqrestore(&undef_lock, flags);

}



void unregister_undef_hook(struct undef_hook *hook)

{

	spin_lock_irq(&undef_lock);

	unsigned long flags;



	spin_lock_irqsave(&undef_lock, flags);

	list_del(&hook->node);

	spin_unlock_irq(&undef_lock);

	spin_unlock_irqrestore(&undef_lock, flags);

}



asmlinkage void do_undefinstr(struct pt_regs *regs)