Re: [RFC][PATCH 0/9] Variable size jump_label support

[Steven Rostedt]

On Mon, 7 Oct 2019 18:13:02 +0200
Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> On Mon, Oct 07, 2019 at 11:17:42AM -0400, Steven Rostedt wrote:
> > Actually, even back then I said that it would be best to merge all the
> > tools into one (I just didn't have the time to implement it), and then
> > we could pull this off. I have one of my developers working to merge
> > record-mcount into objtool now (there's been some patches floating
> > around).  
> 
> Right, but while working on this I discovered GCC's -mrecord-mcount (and
> the kernel using this), so how much do we really still need the
> record-mcount tool?

That only works for some archs, not all of them. At least not yet that
I'm aware of.

> 
> Do we really only need the tool for the little hole between gcc-4.6
> (minimal supported GCC version) and gcc-5 (when -mrecord-mcount was
> introduced) ?

Again, it's for more than just x86 ;-)

-- Steve