On Fri, Oct 09, 2020 at 09:59:31AM +0200, Daniel Vetter wrote: > We want all iomem mmaps to consistently revoke ptes when the kernel > takes over and CONFIG_IO_STRICT_DEVMEM is enabled. This includes the > pci bar mmaps available through procfs and sysfs, which currently do > not revoke mappings. > > To prepare for this, move the code from the /dev/kmem driver to > kernel/resource.c. > > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> > Cc: Jason Gunthorpe <jgg@xxxxxxxx> > Cc: Kees Cook <keescook@xxxxxxxxxxxx> > Cc: Dan Williams <dan.j.williams@xxxxxxxxx> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > Cc: John Hubbard <jhubbard@xxxxxxxxxx> > Cc: Jérôme Glisse <jglisse@xxxxxxxxxx> > Cc: Jan Kara <jack@xxxxxxx> > Cc: Dan Williams <dan.j.williams@xxxxxxxxx> > Cc: linux-mm@xxxxxxxxx > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Cc: linux-samsung-soc@xxxxxxxxxxxxxxx > Cc: linux-media@xxxxxxxxxxxxxxx > Cc: Arnd Bergmann <arnd@xxxxxxxx> > Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> > Cc: David Hildenbrand <david@xxxxxxxxxx> > Cc: "Rafael J. Wysocki" <rafael.j.wysocki@xxxxxxxxx> Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
