Re: + mm-export-pageheadhuge-fix.patch added to -mm tree

[Matthew Wilcox <willy@xxxxxxxxxxxxx>]

On Mon, Feb 28, 2022 at 07:08:44PM +0000, David Howells wrote:
> Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:
> 
> > -EXPORT_SYMBOL(PageHeadHuge);
> > +EXPORT_SYMBOL_GPL(PageHeadHuge);
> 
> Does this mean that we're moving towards forbidding use of the pagecache in
> non-GPL drivers?  'Standard' bits of the folio API use this function
> implicitly.

Check out the definition of PageHuge() directly above.  Same usage in
pre-folio times.