Re: [PATCH v15 04/10] arm64: Kprobes with single stepping support

[Marc Zyngier]

On 20/07/16 17:28, Catalin Marinas wrote:
> On Wed, Jul 20, 2016 at 05:09:28PM +0100, Marc Zyngier wrote:
>> +static inline unsigned long min_stack_size(unsigned long addr)
>> +{
>> +	unsigned long size;
>> +	struct kprobe_ctlblk *ctl;
>> +
>> +	if (on_irq_stack(addr, raw_smp_processor_id()))
>> +		size = IRQ_STACK_PTR(raw_smp_processor_id()) - addr;
>> +	else
>> +		size = (unsigned long)current_thread_info() + THREAD_START_SP - addr;
>> +
>> +	return min(size, sizeof(ctl->jprobes_stack));
>> +}
> 
> We could drop the local ctl pointer:
> 
> 	return min(size, sizeof(((struct kprobe_ctlblk *)0)->jprobes_stack));
> 
> If you add a log, I'll push the patch on top of the kprobes branch.

Here you go:

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