[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: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index df2cb06..d571c37 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -248,16 +248,20 @@
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)