Re: [PATCH] mm/page_table_check: Drop all redundant EXPORT_SYMBOL()

[Pasha Tatashin <pasha.tatashin@xxxxxxxxxx>]

On Wed, Apr 20, 2022 at 11:23 PM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote:
>
> On Wed, Apr 20, 2022 at 12:54:08PM -0400, Pasha Tatashin wrote:
> > The rest of EXPORTs were added to be symmetric, and allow other
> > drivers to use set_*p**()/clear_p** calls.
>
> EXPORT_SYMBOLs actually have a real cost.  We don't add them "for
> symmetry".

Sure, the rest of exports can be removed, but:

> -EXPORT_SYMBOL(__page_table_check_pte_set);

must stay because of

ERROR: modpost: "__page_table_check_pte_set"
[drivers/gpu/drm/i915/i915.ko] undefined!

Pasha