/* | |
* 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); |