avr32: Cover the kernel page tables in the user PGDs

[linux-2.6-omap-h63xx.git] / include / asm-avr32 / pgalloc.h

diff --git a/include/asm-avr32/pgalloc.h b/include/asm-avr32/pgalloc.h
index 5b768fc2388e1e298ebdccc3074534804f8a49a4..e9636d1f383fa8e77dd3130a5b4a750ddd04636c 100644 (file)
--- a/include/asm-avr32/pgalloc.h
+++ b/include/asm-avr32/pgalloc.h
@@ -9,8 +9,6 @@
 #define __ASM_AVR32_PGALLOC_H
 
 #include <linux/mm.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
 
 static inline void pmd_populate_kernel(struct mm_struct *mm,
                                       pmd_t *pmd, pte_t *pte)
@@ -30,12 +28,20 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  */
 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 {
-       return kcalloc(USER_PTRS_PER_PGD, sizeof(pgd_t), GFP_KERNEL);
+       pgd_t *pgd;
+
+       pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT);
+       if (likely(pgd))
+               memcpy(pgd + USER_PTRS_PER_PGD,
+                       swapper_pg_dir + USER_PTRS_PER_PGD,
+                       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+
+       return pgd;
 }
 
 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
 {
-       kfree(pgd);
+       free_page((unsigned long)pgd);
 }
 
 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,