kernel/bpf/memalloc.c

84 	struct llist_head free_llist;
97 	/* count of objects in free_llist */
182 	 * counter. It protects free_llist from corruption in case NMI
200 	__llist_add(obj, &c->free_llist);
349 		llnode = __llist_del_first(&c->free_llist);
644 	free_all(__llist_del_all(&c->free_llist), percpu);
655 	WARN_ON_ONCE(!llist_empty(&c->free_llist));
804 		llnode = __llist_del_first(&c->free_llist);
817 	 * will run after IRQ is enabled and free_llist may be refilled by
826  * add it to the free_llist of the current cpu.
845 		__llist_add(llnode, &c->free_llist);
864 	 * not been triggered and free_llist can not be refilled timely.
967 /* Directly does a kfree() without putting 'ptr' back to the free_llist
974  * Otherwise, the bpf_mem_alloc's free_llist cannot be refilled
987  * kmalloc if the free_llist is empty.