Re: [PATCH 1/6] locking/atomic, asm-generic: instrument ordering variants

From: Mark Rutland
Date: Sat May 05 2018 - 05:12:42 EST


On Fri, May 04, 2018 at 08:24:22PM +0200, Peter Zijlstra wrote:
> On Fri, May 04, 2018 at 07:09:09PM +0100, Mark Rutland wrote:
> > On Fri, May 04, 2018 at 08:01:05PM +0200, Peter Zijlstra wrote:
> > > On Fri, May 04, 2018 at 06:39:32PM +0100, Mark Rutland wrote:
>
> > > > include/asm-generic/atomic-instrumented.h | 1195 ++++++++++++++++++++++++-----
> > > > 1 file changed, 1008 insertions(+), 187 deletions(-)
> > >
> > > Is there really no way to either generate or further macro compress this?
> >
> > I can definitely macro compress this somewhat, but the bulk of the
> > repetition will be the ifdeffery, which can't be macro'd away IIUC.
>
> Right, much like what we already have in linux/atomic.h I suspect,
> having to duplicating that isn't brilliant either.
>
> > Generating this with a script is possible -- do we do anything like that
> > elsewhere?
>
> There's include/generated/ in your build directory. But nothing on this
> scale I think.

Sure. I'm not familiar with how we generate those, so I'll go digging through
the build infrastructure.

Thanks,
Mark.