x86/power/hibernate_64: Remove VLA usage

 */

static int get_e820_md5(struct e820_table *table, void *buf)

{

	struct scatterlist sg;

	struct crypto_ahash *tfm;

	struct crypto_shash *tfm;

	struct shash_desc *desc;

	int size;

	int ret = 0;

	tfm = crypto_alloc_ahash("md5", 0, CRYPTO_ALG_ASYNC);

	tfm = crypto_alloc_shash("md5", 0, 0);

	if (IS_ERR(tfm))

		return -ENOMEM;

	{

		AHASH_REQUEST_ON_STACK(req, tfm);

		size = offsetof(struct e820_table, entries) + sizeof(struct e820_entry) * table->nr_entries;

		ahash_request_set_tfm(req, tfm);

		sg_init_one(&sg, (u8 *)table, size);

		ahash_request_set_callback(req, 0, NULL, NULL);

		ahash_request_set_crypt(req, &sg, buf, size);

		if (crypto_ahash_digest(req))

			ret = -EINVAL;

		ahash_request_zero(req);

	desc = kmalloc(sizeof(struct shash_desc) + crypto_shash_descsize(tfm),

		       GFP_KERNEL);

	if (!desc) {

		ret = -ENOMEM;

		goto free_tfm;

	}

	crypto_free_ahash(tfm);

	desc->tfm = tfm;

	desc->flags = 0;

	size = offsetof(struct e820_table, entries) +

		sizeof(struct e820_entry) * table->nr_entries;

	if (crypto_shash_digest(desc, (u8 *)table, size, buf))

		ret = -EINVAL;

	kzfree(desc);

free_tfm:

	crypto_free_shash(tfm);

	return ret;

}