/* * 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_TABLE_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);