swap_duplicate    243 include/linux/swap.h extern int swap_duplicate(swp_entry_t);
swap_duplicate    505 mm/memory.c    			swap_duplicate(entry);
swap_duplicate    745 mm/rmap.c      			swap_duplicate(entry);
swap_duplicate   1055 mm/shmem.c     		swap_duplicate(swap);
swap_duplicate    294 mm/swap_state.c 		if (!swap_duplicate(entry))