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Diffstat (limited to 'arch/arm/mm/pgd.c')
-rw-r--r--arch/arm/mm/pgd.c37
1 files changed, 18 insertions, 19 deletions
diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c
index 69bbfc6645a..93292a18cf7 100644
--- a/arch/arm/mm/pgd.c
+++ b/arch/arm/mm/pgd.c
@@ -17,12 +17,10 @@
#include "mm.h"
-#define FIRST_KERNEL_PGD_NR (FIRST_USER_PGD_NR + USER_PTRS_PER_PGD)
-
/*
* need to get a 16k page for level 1
*/
-pgd_t *get_pgd_slow(struct mm_struct *mm)
+pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *new_pgd, *init_pgd;
pmd_t *new_pmd, *init_pmd;
@@ -32,14 +30,14 @@ pgd_t *get_pgd_slow(struct mm_struct *mm)
if (!new_pgd)
goto no_pgd;
- memset(new_pgd, 0, FIRST_KERNEL_PGD_NR * sizeof(pgd_t));
+ memset(new_pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
/*
* Copy over the kernel and IO PGD entries
*/
init_pgd = pgd_offset_k(0);
- memcpy(new_pgd + FIRST_KERNEL_PGD_NR, init_pgd + FIRST_KERNEL_PGD_NR,
- (PTRS_PER_PGD - FIRST_KERNEL_PGD_NR) * sizeof(pgd_t));
+ memcpy(new_pgd + USER_PTRS_PER_PGD, init_pgd + USER_PTRS_PER_PGD,
+ (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
clean_dcache_area(new_pgd, PTRS_PER_PGD * sizeof(pgd_t));
@@ -73,28 +71,29 @@ no_pgd:
return NULL;
}
-void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd)
+void pgd_free(struct mm_struct *mm, pgd_t *pgd_base)
{
+ pgd_t *pgd;
pmd_t *pmd;
pgtable_t pte;
- if (!pgd)
+ if (!pgd_base)
return;
- /* pgd is always present and good */
- pmd = pmd_off(pgd, 0);
- if (pmd_none(*pmd))
- goto free;
- if (pmd_bad(*pmd)) {
- pmd_ERROR(*pmd);
- pmd_clear(pmd);
- goto free;
- }
+ pgd = pgd_base + pgd_index(0);
+ if (pgd_none_or_clear_bad(pgd))
+ goto no_pgd;
+
+ pmd = pmd_offset(pgd, 0);
+ if (pmd_none_or_clear_bad(pmd))
+ goto no_pmd;
pte = pmd_pgtable(*pmd);
pmd_clear(pmd);
pte_free(mm, pte);
+no_pmd:
+ pgd_clear(pgd);
pmd_free(mm, pmd);
-free:
- free_pages((unsigned long) pgd, 2);
+no_pgd:
+ free_pages((unsigned long) pgd_base, 2);
}