[ARM] pgtable: rearrange file PTE bit allocation

[pandora-kernel.git] / arch / arm / include / asm / pgtable.h

diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index d575666..9655bce 100644 (file)
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -162,8 +162,8 @@ extern void __pgd_error(const char *file, int line, unsigned long val);
  * entries are stored 1024 bytes below.
  */
 #define L_PTE_PRESENT          (1 << 0)
-#define L_PTE_FILE             (1 << 1)        /* only when !PRESENT */
 #define L_PTE_YOUNG            (1 << 1)
+#define L_PTE_FILE             (1 << 2)        /* only when !PRESENT */
 #define L_PTE_DIRTY            (1 << 6)
 #define L_PTE_WRITE            (1 << 7)
 #define L_PTE_USER             (1 << 8)
@@ -379,13 +379,13 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
  *
  *   3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
  *   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
- *   <--------------- offset --------------------> <--- type --> 0 0
+ *   <--------------- offset --------------------> <- type --> 0 0 0
  *
- * This gives us up to 127 swap files and 32GB per swap file.  Note that
+ * This gives us up to 63 swap files and 32GB per swap file.  Note that
  * the offset field is always non-zero.
  */
-#define __SWP_TYPE_SHIFT       2
-#define __SWP_TYPE_BITS                7
+#define __SWP_TYPE_SHIFT       3
+#define __SWP_TYPE_BITS                6
 #define __SWP_TYPE_MASK                ((1 << __SWP_TYPE_BITS) - 1)
 #define __SWP_OFFSET_SHIFT     (__SWP_TYPE_BITS + __SWP_TYPE_SHIFT)
 
@@ -409,13 +409,13 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
  *
  *   3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
  *   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
- *   <------------------------ offset -------------------------> 1 0
+ *   <----------------------- offset ------------------------> 1 0 0
  */
 #define pte_file(pte)          (pte_val(pte) & L_PTE_FILE)
-#define pte_to_pgoff(x)                (pte_val(x) >> 2)
-#define pgoff_to_pte(x)                __pte(((x) << 2) | L_PTE_FILE)
+#define pte_to_pgoff(x)                (pte_val(x) >> 3)
+#define pgoff_to_pte(x)                __pte(((x) << 3) | L_PTE_FILE)
 
-#define PTE_FILE_MAX_BITS      30
+#define PTE_FILE_MAX_BITS      29
 
 /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 /* FIXME: this is not correct */