From 99cce8f7b10716f8fdbaca21a7f3ba000119ad3b Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Thu, 3 May 2007 00:18:34 +0100 Subject: [PATCH] [ARM] 4356/1: arm: fix handling of svc mode undefined instructions Now that do_undefinstr handles kernel and user mode undefined instruction exceptions it must not assume that interrupts are enabled at entry. Signed-off-by: Dan Williams Signed-off-by: Russell King --- arch/arm/kernel/traps.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 6055ab4b58d..f05e66b0f86 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -286,6 +286,7 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) struct undef_hook *hook; siginfo_t info; void __user *pc; + unsigned long flags; /* * According to the ARM ARM, PC is 2 or 4 bytes ahead, @@ -304,7 +305,7 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) get_user(instr, (u32 __user *)pc); } - spin_lock_irq(&undef_lock); + spin_lock_irqsave(&undef_lock, flags); list_for_each_entry(hook, &undef_hook, node) { if ((instr & hook->instr_mask) == hook->instr_val && (regs->ARM_cpsr & hook->cpsr_mask) == hook->cpsr_val) { @@ -314,7 +315,7 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) } } } - spin_unlock_irq(&undef_lock); + spin_unlock_irqrestore(&undef_lock, flags); #ifdef CONFIG_DEBUG_USER if (user_debug & UDBG_UNDEFINED) { -- 2.41.1