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mm: pagewalk: Take the pagetable lock in walk_pte_range()
Without the lock, anybody modifying a pte from within this function might have it concurrently modified by someone else. Cc: Matthew Wilcox <[email protected]> Cc: Will Deacon <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Huang Ying <[email protected]> Cc: Jérôme Glisse <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Suggested-by: Linus Torvalds <[email protected]> Signed-off-by: Thomas Hellstrom <[email protected]> Acked-by: Kirill A. Shutemov <[email protected]>
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