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After is_cow_mapping() is exported in mm.h, replace some manual checks elsewhere throughout the tree but start to use the new helper. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Peter Xu <[email protected]> Reviewed-by: Jason Gunthorpe <[email protected]> Cc: VMware Graphics <[email protected]> Cc: Roland Scheidegger <[email protected]> Cc: David Airlie <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: Mike Kravetz <[email protected]> Cc: Alexey Dobriyan <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: Christoph Hellwig <[email protected]> Cc: David Gibson <[email protected]> Cc: Gal Pressman <[email protected]> Cc: Jan Kara <[email protected]> Cc: Jann Horn <[email protected]> Cc: Kirill Shutemov <[email protected]> Cc: Kirill Tkhai <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Miaohe Lin <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Wei Zhang <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>