On Tue, May 03, 2022 at 03:22:07PM +0200, Juergen Gross wrote: > Some drivers are using pat_enabled() in order to test availability of > special caching modes (WC and UC-). This will lead to false negatives > in case the system was booted e.g. with the "nopat" variant and the > BIOS did setup the PAT MSR supporting the queried mode, or if the > system is running as a Xen PV guest. > > Add test functions for those caching modes instead and use them at the > appropriate places. > > For symmetry reasons export the already existing x86_has_pat_wp() for > modules, too. No, we never export unused functionality.
