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| author | Dan Williams <dan.j.williams@intel.com> | 2007-05-03 00:18:34 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-05-03 14:07:48 +0100 |
| commit | 99cce8f7b10716f8fdbaca21a7f3ba000119ad3b (patch) | |
| tree | 028915c49215df5352d20f6ccc9258f3b25a3e9e /arch/arm | |
| parent | f16fb1ecc5a1cb2f7cc595179d1fe55e711e599f (diff) | |
| download | blackbird-op-linux-99cce8f7b10716f8fdbaca21a7f3ba000119ad3b.tar.gz blackbird-op-linux-99cce8f7b10716f8fdbaca21a7f3ba000119ad3b.zip | |
[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 <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kernel/traps.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 6055ab4b58d9..f05e66b0f868 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) { |
