mm: rework swap handling of zap_pte_range

Clean the code up by merging the device private/exclusive swap entry
handling with the rest, then we merge the pte clear operation too.

struct* page is defined in multiple places in the function, move it
upward.

free_swap_and_cache() is only useful for !non_swap_entry() case, put it
into the condition.

No functional change intended.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Peter Xu <[email protected]>
Reviewed-by: John Hubbard <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: "Kirill A . Shutemov" <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Yang Shi <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Alistair Popple <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions