On Fri, Mar 22, 2019 at 2:21 PM Sakari Ailus
[off-list ref] wrote:

%pS and %ps are now the preferred conversion specifiers to print function
%names. The functionality is equivalent; remove the old, deprecated %pF
%and %pf support.

Are %pF and %pf really not used any more in the kernel?

If that is not the case, you need to convert the remaining users of
them to using %ps or %pS before making support for them go away
completely.

That said, checkpatch can be made treat %pf/F as invalid format right away IMO.