arch_bpf_stack_walk
void arch_bpf_stack_walk(bool (*consume_fn)(void *cookie, u64 ip, u64 sp, u64 bp), void *cookie);
arch_bpf_stack_walk(find_from_stack_cb, &ctx);
arch_bpf_stack_walk(bpf_stack_walker, &ctx);
arch_bpf_stack_walk(dump_stack_cb, &ctx);