[MODERATED] Re: [PATCH 1/3] v4 more sampling fun 1

On Thu, Mar 19, 2020 at 08:50:28AM -0700, speck for Luck, Tony wrote:
> On Thu, Mar 19, 2020 at 08:40:46AM -0700, speck for mark gross wrote:
> > On Thu, Mar 19, 2020 at 09:50:40AM +0100, speck for Greg KH wrote:
> > > Are you sure about the "avoid churn" stuff?  Can't you just fix up the
> > > X86_FEATURE_MATCH() #define to do that?
> > I wasn't confident about avoiding churn but I was hoping too.
> > Yes, I am pretty sure I can fix up that macro.
> 
> My fault ... I thought it might be easier on the backport to
> all the stable and long term kernels if we kept this small at
> this stage.  If upstream wants to cleanup all the users in a
> subsequent patch, then we can do that too.

Don't worry about stable/longterm, do the right thing first.  We can
worry about backports later.

> Alternatively there is Thomas' suggestion to encode the
> range of steppings in the upper bits of driver_data and
> avoid touching this structure altogether.

Ick, ick ick...