Re: [RFC] ARC: initial ftrace support

[Steven Rostedt]

On Fri, 27 Mar 2020 18:53:55 +0300
Eugeniy Paltsev <Eugeniy.Paltsev@xxxxxxxxxxxx> wrote:

> +
> +noinline void _mcount(unsigned long parent_ip)
> +{
> +	unsigned long ip = (unsigned long)__builtin_return_address(0);
> +
> +	if (unlikely(ftrace_trace_function != ftrace_stub))
> +		ftrace_trace_function(ip - MCOUNT_INSN_SIZE, parent_ip,
> +				      NULL, NULL);
> +}
> +EXPORT_SYMBOL(_mcount);

So, ARCv2 allows the _mcount code to be written in C? Nice!

-- Steve