1 /* 1 /*
2 * This file is subject to the terms and condi 2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the mai 3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details. 4 * for more details.
5 */ 5 */
6 #include <linux/export.h> 6 #include <linux/export.h>
7 #include <linux/mm.h> 7 #include <linux/mm.h>
8 #include <linux/string.h> 8 #include <linux/string.h>
9 #include <asm/pgalloc.h> 9 #include <asm/pgalloc.h>
10 10
11 pgd_t *pgd_alloc(struct mm_struct *mm) 11 pgd_t *pgd_alloc(struct mm_struct *mm)
12 { 12 {
13 pgd_t *init, *ret = NULL; 13 pgd_t *init, *ret = NULL;
14 struct ptdesc *ptdesc = pagetable_allo 14 struct ptdesc *ptdesc = pagetable_alloc(GFP_KERNEL & ~__GFP_HIGHMEM,
15 PGD_TABLE_ORDER); 15 PGD_TABLE_ORDER);
16 16
17 if (ptdesc) { 17 if (ptdesc) {
18 ret = ptdesc_address(ptdesc); 18 ret = ptdesc_address(ptdesc);
19 init = pgd_offset(&init_mm, 0U 19 init = pgd_offset(&init_mm, 0UL);
20 pgd_init(ret); 20 pgd_init(ret);
21 memcpy(ret + USER_PTRS_PER_PGD 21 memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
22 (PTRS_PER_PGD - USER_PT 22 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
23 } 23 }
24 24
25 return ret; 25 return ret;
26 } 26 }
27 EXPORT_SYMBOL_GPL(pgd_alloc); 27 EXPORT_SYMBOL_GPL(pgd_alloc);
28 28
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.