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Linux/arch/mips/mm/pgtable.c

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  1 /*
  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
  4  * for more details.
  5  */
  6 #include <linux/export.h>
  7 #include <linux/mm.h>
  8 #include <linux/string.h>
  9 #include <asm/pgalloc.h>
 10 
 11 pgd_t *pgd_alloc(struct mm_struct *mm)
 12 {
 13         pgd_t *ret, *init;
 14 
 15         ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
 16         if (ret) {
 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));
 21         }
 22 
 23         return ret;
 24 }
 25 EXPORT_SYMBOL_GPL(pgd_alloc);
 26 

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