Commit 7a079ba2 authored by Peter Xu's avatar Peter Xu Committed by Andrew Morton
Browse files

mm/uffd: fix comment in handling pte markers 

The comment is obsolete after f369b07c ("mm/uffd: reset write
protection when unregister with wp-mode", 2022-08-20).  Remove it.

Link: https://lkml.kernel.org/r/20230215205800.223549-1-peterx@redhat.com


Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
Reviewed-by: default avatarDavid Hildenbrand <david@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent cd775580

mm/memory.c

+1 −3
Original line number Diff line number Diff line
@@ -3627,9 +3627,7 @@ static vm_fault_t pte_marker_handle_uffd_wp(struct vm_fault *vmf) 
{

	/*

	 * Just in case there're leftover special ptes even after the region

	 * got unregistered - we can simply clear them.  We can also do that

	 * proactively when e.g. when we do UFFDIO_UNREGISTER upon some uffd-wp

	 * ranges, but it should be more efficient to be done lazily here.

	 * got unregistered - we can simply clear them.

	 */

	if (unlikely(!userfaultfd_wp(vmf->vma) || vma_is_anonymous(vmf->vma)))

		return pte_marker_clear(vmf);