mm/cma: Cleanup highmem check

	phys_addr_t highmem_start;

	phys_addr_t highmem_start;

	int ret = 0;

	int ret = 0;

#ifdef CONFIG_X86

	/*

	/*

	 * high_memory isn't direct mapped memory so retrieving its physical

	 * We can't use __pa(high_memory) directly, since high_memory

	 * address isn't appropriate.  But it would be useful to check the

	 * isn't a valid direct map VA, and DEBUG_VIRTUAL will (validly)

	 * physical address of the highmem boundary so it's justifiable to get

	 * complain. Find the boundary by adding one to the last valid

	 * the physical address from it.  On x86 there is a validation check for

	 * address.

	 * this case, so the following workaround is needed to avoid it.

	 */

	 */

	highmem_start = __pa_nodebug(high_memory);

	highmem_start = __pa(high_memory - 1) + 1;

#else

	highmem_start = __pa(high_memory);

#endif

	pr_debug("%s(size %pa, base %pa, limit %pa alignment %pa)\n",

	pr_debug("%s(size %pa, base %pa, limit %pa alignment %pa)\n",

		__func__, &size, &base, &limit, &alignment);

		__func__, &size, &base, &limit, &alignment);