1 files changed, 22 insertions, 15 deletions

diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index c433c6c73112..201ccaa11f61 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -162,10 +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_BUFFERABLE        (1 << 2)        /* obsolete, matches PTE */
-#define L_PTE_CACHEABLE         (1 << 3)        /* obsolete, matches PTE */
+#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)
@@ -264,10 +262,19 @@ extern struct page *empty_zero_page;
 #define pte_clear(mm,addr,ptep) set_pte_ext(ptep, __pte(0), 0)
 #define pte_page(pte)           (pfn_to_page(pte_pfn(pte)))
 #define pte_offset_kernel(dir,addr)     (pmd_page_vaddr(*(dir)) + __pte_index(addr))
-#define pte_offset_map(dir,addr)        (pmd_page_vaddr(*(dir)) + __pte_index(addr))
-#define pte_offset_map_nested(dir,addr) (pmd_page_vaddr(*(dir)) + __pte_index(addr))
-#define pte_unmap(pte)          do { } while (0)
-#define pte_unmap_nested(pte)   do { } while (0)
+
+#define pte_offset_map(dir,addr)        (__pte_map(dir, KM_PTE0) + __pte_index(addr))
+#define pte_offset_map_nested(dir,addr) (__pte_map(dir, KM_PTE1) + __pte_index(addr))
+#define pte_unmap(pte)                  __pte_unmap(pte, KM_PTE0)
+#define pte_unmap_nested(pte)           __pte_unmap(pte, KM_PTE1)
+
+#ifndef CONFIG_HIGHPTE
+#define __pte_map(dir,km)       pmd_page_vaddr(*(dir))
+#define __pte_unmap(pte,km)     do { } while (0)
+#else
+#define __pte_map(dir,km)       ((pte_t *)kmap_atomic(pmd_page(*(dir)), km) + PTRS_PER_PTE)
+#define __pte_unmap(pte,km)     kunmap_atomic((pte - PTRS_PER_PTE), km)
+#endif
 
 #define set_pte_ext(ptep,pte,ext) cpu_set_pte_ext(ptep,pte,ext)
 
@@ -381,13 +388,13 @@ 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)
 
@@ -411,13 +418,13 @@ 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 */