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mm/uffd: fix comment in handling pte markers 

The comment is obsolete after f369b07c86 ("mm/uffd: reset write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: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Peter Xu 2023-02-15 15:58:00 -05:00 committed by Andrew Morton
parent cd7755800e
commit 7a079ba200
1 changed files with 1 additions and 3 deletions
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4
mm/memory.c
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@ -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);