| /* | |
| * 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 *ret, *init; | |
| ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER); | |
| if (ret) { | |
| init = pgd_offset(&init_mm, 0UL); | |
| pgd_init((unsigned long)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); |