mm/uffd: fix warning without PTE_MARKER_UFFD_WP compiled in
When PTE_MARKER_UFFD_WP not configured, it's still possible to reach pte marker code and trigger an warning. Add a few CONFIG_PTE_MARKER_UFFD_WP ifdefs to make sure the code won't be reached when not compiled in. Link: https://lkml.kernel.org/r/YzeR+R6b4bwBlBHh@x1n Fixes: b1f9e876 ("mm/uffd: enable write protection for shmem & hugetlbfs") Signed-off-by: Peter Xu <peterx@redhat.com> Reported-by: <syzbot+2b9b4f0895be09a6dec3@syzkaller.appspotmail.com> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Brian Geffon <bgeffon@google.com> Cc: Edward Liaw <edliaw@google.com> Cc: Liu Shixin <liushixin2@huawei.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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