/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/export.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <asm/pgalloc.h>

pgd_t *pgd_alloc(struct mm_struct *mm)
{
        pgd_t *init, *ret;

        ret = __pgd_alloc(mm, PGD_TABLE_ORDER);
        if (ret) {
                init = pgd_offset(&init_mm, 0UL);
                pgd_init(ret);
                memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
                       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
        }

        return ret;
}
EXPORT_SYMBOL_GPL(pgd_alloc);