Re: [PATCH 03/17] tracing/kprobes: Factor out struct trace_probe

From: Namhyung Kim
Date: Mon Dec 02 2013 - 02:20:39 EST


Hi Srikar,

On Fri, 29 Nov 2013 14:55:21 +0530, Srikar Dronamraju wrote:
> * Namhyung Kim <namhyung@xxxxxxxxxx> [2013-11-27 15:19:49]:
>> /**
>> * Kprobe event core functions
>> */
>> -struct trace_probe {
>> +struct trace_kprobe {
>> struct list_head list;
>> struct kretprobe rp; /* Use rp.kp for kprobe use */
>> unsigned long nhit;
>> - unsigned int flags; /* For TP_FLAG_* */
>> const char *symbol; /* symbol name */
>> - struct ftrace_event_class class;
>> - struct ftrace_event_call call;
>> - struct list_head files;
>> - ssize_t size; /* trace entry size */
>> - unsigned int nr_args;
>> - struct probe_arg args[];
>> + struct trace_probe p;
>
> Can I suggest to use tp instead of p to denote trace_probe?

Sure. I'll change it.

>
>> };
>>
>>
>
> <..snipped..>
>
>> -static int register_probe_event(struct trace_probe *tp);
>> -static int unregister_probe_event(struct trace_probe *tp);
>> +static int register_kprobe_event(struct trace_kprobe *tk);
>> +static int unregister_kprobe_event(struct trace_kprobe *tk);
>>
>> static DEFINE_MUTEX(probe_lock);
>> static LIST_HEAD(probe_list);
>> @@ -107,14 +91,14 @@ static int kretprobe_dispatcher(struct kretprobe_instance *ri,
>> /*
>> * Allocate new trace_probe and initialize it (including kprobes).
>> */
>> -static struct trace_probe *alloc_trace_probe(const char *group,
>> +static struct trace_kprobe *alloc_trace_kprobe(const char *group,
>> const char *event,
>> void *addr,
>> const char *symbol,
>> unsigned long offs,
>> int nargs, bool is_return)
>> {
>> - struct trace_probe *tp;
>> + struct trace_kprobe *tp;
>
> Nit: Here and couple of places below: Given that tk was used to
> represent trace_kprobe, can we use tk everywhere. Using tp to represent
> trace_probe and trace_kprobe is a bit confusing.

Right. I did it because changing it to 'tk' leads to many oneline hunks
here and there so I worried it might disturb reviewers.

But yeah, I also dislike it. I'll change it to have consistent names.

>
>> int ret = -ENOMEM;
>>
>
> The rest looks fine.

Thanks for your review!
Namhyung
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