Why do we need list_for_each_safe() in for deleting nodes in kernel linked list?

Question

I\'m learning how to use the kernel linked-list API from list.h.

I learned that I need to use list_for_each_safe() when deleting nodes off with list_d

Answer 1

pos = start;
del(pos);
pos = pos->next;

as opposed to

pos = start;
n = pos->next;
del(pos);
pos = n;

if del() is free() and memset(), pos->next is undefined