Hi!

> The __apply_to_page_range() function is also used to change and/or
> allocate page-table pages in the vmalloc area of the address space.
> Make sure these changes get synchronized to other page-tables in the
> system by calling arch_sync_kernel_mappings() when necessary.
> 
> Tested-by: Chris Wilson <chris@chris-wilson.co.uk> #x86-32
> Cc: <stable@vger.kernel.org> # v5.8+
> Signed-off-by: Joerg Roedel <jroedel@suse.de>

This seems to solve screen blinking problems on Thinkpad X60. (It
already survived few unison runs, which would usually kill it.).

Tested-by: Pavel Machek <pavel@ucw.cz>

Thanks and best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html