mm/z3fold.c: lock z3fold page before __SetPageMovable()

Following zsmalloc.c's example we call trylock_page() and unlock_page().
Also make z3fold_page_migrate() assert that newpage is passed in locked,
as per the documentation.

[[email protected]: fix trylock_page return value test, per Shakeel]
Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Henry Burns <[email protected]>
Suggested-by: Vitaly Wool <[email protected]>
Acked-by: Vitaly Wool <[email protected]>
Acked-by: David Rientjes <[email protected]>
Reviewed-by: Shakeel Butt <[email protected]>
Cc: Vitaly Vul <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Xidong Wang <[email protected]>
Cc: Jonathan Adams <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions