__swap_count      465 include/linux/swap.h extern int __swap_count(swp_entry_t entry);
__swap_count     2791 mm/memory.c    				__swap_count(entry) == 1) {
__swap_count      109 mm/page_io.c   	if (disk->fops->swap_slot_free_notify && __swap_count(entry) == 1) {