register_memory_notifier  107 include/linux/memory.h extern int register_memory_notifier(struct notifier_block *nb);
register_memory_notifier  128 include/linux/memory.h 	register_memory_notifier(&fn##_mem_nb);			\
register_memory_notifier  130 include/linux/memory.h #define register_hotmemory_notifier(nb)		register_memory_notifier(nb)