powerpc/mm/hash: Handle mmap_min_addr correctly in get_unmapped_area topdown search

#include <linux/export.h>

#include <linux/hugetlb.h>

#include <linux/sched/mm.h>

#include <linux/security.h>

#include <asm/mman.h>

#include <asm/mmu.h>

#include <asm/copro.h>

	int pshift = max_t(int, mmu_psize_defs[psize].shift, PAGE_SHIFT);

	unsigned long addr, found, prev;

	struct vm_unmapped_area_info info;

	unsigned long min_addr = max(PAGE_SIZE, mmap_min_addr);

	info.flags = VM_UNMAPPED_AREA_TOPDOWN;

	info.length = len;

	if (high_limit > DEFAULT_MAP_WINDOW)

		addr += mm->context.slb_addr_limit - DEFAULT_MAP_WINDOW;

	while (addr > PAGE_SIZE) {

	while (addr > min_addr) {

		info.high_limit = addr;

		if (!slice_scan_available(addr - 1, available, 0, &addr))

			continue;

		 * Check if we need to reduce the range, or if we can

		 * extend it to cover the previous available slice.

		 */

		if (addr < PAGE_SIZE)

			addr = PAGE_SIZE;

		if (addr < min_addr)

			addr = min_addr;

		else if (slice_scan_available(addr - 1, available, 0, &prev)) {

			addr = prev;

			goto prev_slice;

		addr = _ALIGN_UP(addr, page_size);

		slice_dbg(" aligned addr=%lx\n", addr);

		/* Ignore hint if it's too large or overlaps a VMA */

		if (addr > high_limit - len ||

		if (addr > high_limit - len || addr < mmap_min_addr ||

		    !slice_area_is_free(mm, addr, len))

			addr = 0;

	}