2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 #include <linux/export.h>
8 #include <linux/string.h>
9 #include <asm/pgalloc.h>
11 pgd_t *pgd_alloc(struct mm_struct *mm)
15 ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
17 init = pgd_offset(&init_mm, 0UL);
18 pgd_init((unsigned long)ret);
19 memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
20 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
25 EXPORT_SYMBOL_GPL(pgd_alloc);