x86, mm: Use clamp_t() in init_range_memory_mapping

 * would have hole in the middle or ends, and only ram parts will be mapped.

 */

static unsigned long __init init_range_memory_mapping(

					   unsigned long range_start,

					   unsigned long range_end)

					   unsigned long r_start,

					   unsigned long r_end)

{

	unsigned long start_pfn, end_pfn;

	unsigned long mapped_ram_size = 0;

	int i;

	for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) {

		u64 start = (u64)start_pfn << PAGE_SHIFT;

		u64 end = (u64)end_pfn << PAGE_SHIFT;

		if (end <= range_start)

			continue;

		if (start < range_start)

			start = range_start;

		if (start >= range_end)

		u64 start = clamp_val(PFN_PHYS(start_pfn), r_start, r_end);

		u64 end = clamp_val(PFN_PHYS(end_pfn), r_start, r_end);

		if (start >= end)

			continue;

		if (end > range_end)

			end = range_end;

		init_memory_mapping(start, end);

		mapped_ram_size += end - start;

	}