diff options
| author | H. Peter Anvin <hpa@zytor.com> | 2008-09-04 08:08:42 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2008-09-04 08:08:42 -0700 |
| commit | 7203781c98ad9147564d327de6f6513ad8fc0f4e (patch) | |
| tree | 5c29a2a04a626bf08a0d56fd8a0068b3c92ad284 /arch/arm/kernel/traps.c | |
| parent | 671eef85a3e885dff4ce210d8774ad50a91d5967 (diff) | |
| parent | af2e1f276ff08f17192411ea3b71c13a758dfe12 (diff) | |
Merge branch 'x86/cpu' into x86/core
Conflicts:
arch/x86/kernel/cpu/feature_names.c
include/asm-x86/cpufeature.h
Diffstat (limited to 'arch/arm/kernel/traps.c')
| -rw-r--r-- | arch/arm/kernel/traps.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 7277aef8309..872f1f8fbb5 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -288,14 +288,28 @@ void unregister_undef_hook(struct undef_hook *hook) spin_unlock_irqrestore(&undef_lock, flags); } +static int call_undef_hook(struct pt_regs *regs, unsigned int instr) +{ + struct undef_hook *hook; + unsigned long flags; + int (*fn)(struct pt_regs *regs, unsigned int instr) = NULL; + + 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) + fn = hook->fn; + spin_unlock_irqrestore(&undef_lock, flags); + + return fn ? fn(regs, instr) : 1; +} + asmlinkage void __exception do_undefinstr(struct pt_regs *regs) { unsigned int correction = thumb_mode(regs) ? 2 : 4; unsigned int instr; - 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, @@ -325,17 +339,8 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) } #endif - 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) { - if (hook->fn(regs, instr) == 0) { - spin_unlock_irqrestore(&undef_lock, flags); - return; - } - } - } - spin_unlock_irqrestore(&undef_lock, flags); + if (call_undef_hook(regs, instr) == 0) + return; #ifdef CONFIG_DEBUG_USER if (user_debug & UDBG_UNDEFINED) { |