bpf: Add bpf_ksym_find function

	       NULL;

}

static struct bpf_ksym *bpf_ksym_find(unsigned long addr)

{

	struct latch_tree_node *n;

	n = latch_tree_find((void *)addr, &bpf_tree, &bpf_tree_ops);

	return n ? container_of(n, struct bpf_ksym, tnode) : NULL;

}

const char *__bpf_address_lookup(unsigned long addr, unsigned long *size,

				 unsigned long *off, char *sym)

{

	struct bpf_prog *prog;

	struct bpf_ksym *ksym;

	char *ret = NULL;

	rcu_read_lock();

	prog = bpf_prog_kallsyms_find(addr);

	if (prog) {

		unsigned long symbol_start = prog->aux->ksym.start;

		unsigned long symbol_end = prog->aux->ksym.end;

	ksym = bpf_ksym_find(addr);

	if (ksym) {

		unsigned long symbol_start = ksym->start;

		unsigned long symbol_end = ksym->end;

		strncpy(sym, prog->aux->ksym.name, KSYM_NAME_LEN);

		strncpy(sym, ksym->name, KSYM_NAME_LEN);

		ret = sym;

		if (size)

	bool ret;

	rcu_read_lock();

	ret = bpf_prog_kallsyms_find(addr) != NULL;

	ret = bpf_ksym_find(addr) != NULL;

	rcu_read_unlock();

	return ret;