[PATCH 1/2] Add framework for tunables

[Siddhesh Poyarekar]

On Wed, Jul 13, 2016 at 11:03:02AM -0700, H.J. Lu wrote:
> Another thing, please add TUNABLE_WITH_CALLBACK:
> 
> TUNABLE_WITH_CALLBACK (ifunc, ifunc);
> 
> so that I can have a callback without setting a value.

You can set the val as NULL, I'll add a NULL check.

Siddhesh