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[PATCH] ARM: Allow register_undef_hook to be called with IRQs off

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

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2005-07-16 16:43:33 +01:00 committed by Russell King
parent 54ea06f6af
commit 109d89ca0e
1 changed files with 8 additions and 4 deletions
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12
arch/arm/kernel/traps.c
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@ -248,16 +248,20 @@ static DEFINE_SPINLOCK(undef_lock);
void register_undef_hook(struct undef_hook *hook) 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); 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) 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); list_del(&hook->node);
spin_unlock_irq(&undef_lock); spin_unlock_irqrestore(&undef_lock, flags);
} }
asmlinkage void do_undefinstr(struct pt_regs *regs) asmlinkage void do_undefinstr(struct pt_regs *regs)