rmap: do not call mmu_notifier_invalidate_page() under ptl

rmap: do not call mmu_notifier_invalidate_page() under ptl

MMU notifiers can sleep, but in page_mkclean_one() we call
mmu_notifier_invalidate_page() under page table lock.

Let's instead use mmu_notifier_invalidate_range() outside
page_vma_mapped_walk() loop.

[[email protected]: try_to_unmap_one() do not call mmu_notifier under ptl]
Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Fixes: c7ab0d2fdc84 ("mm: convert try_to_unmap_one() to use page_vma_mapped_walk()")
Signed-off-by: Kirill A. Shutemov <[email protected]>
Signed-off-by: Jérôme Glisse <[email protected]>
Reported-by: axie <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: "Writer, Tim" <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>