1 files changed, 11 insertions, 8 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8a45ad22a170..3172a1c0f08e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -637,7 +637,7 @@ static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma)
 #define SECTIONS_MASK           ((1UL << SECTIONS_WIDTH) - 1)
 #define ZONEID_MASK             ((1UL << ZONEID_SHIFT) - 1)
 
-static inline enum zone_type page_zonenum(struct page *page)
+static inline enum zone_type page_zonenum(const struct page *page)
 {
         return (page->flags >> ZONES_PGSHIFT) & ZONES_MASK;
 }
@@ -665,15 +665,15 @@ static inline int zone_to_nid(struct zone *zone)
 }
 
 #ifdef NODE_NOT_IN_PAGE_FLAGS
-extern int page_to_nid(struct page *page);
+extern int page_to_nid(const struct page *page);
 #else
-static inline int page_to_nid(struct page *page)
+static inline int page_to_nid(const struct page *page)
 {
         return (page->flags >> NODES_PGSHIFT) & NODES_MASK;
 }
 #endif
 
-static inline struct zone *page_zone(struct page *page)
+static inline struct zone *page_zone(const struct page *page)
 {
         return &NODE_DATA(page_to_nid(page))->node_zones[page_zonenum(page)];
 }
@@ -718,9 +718,9 @@ static inline void set_page_links(struct page *page, enum zone_type zone,
  */
 #include <linux/vmstat.h>
 
-static __always_inline void *lowmem_page_address(struct page *page)
+static __always_inline void *lowmem_page_address(const struct page *page)
 {
-        return __va(PFN_PHYS(page_to_pfn(page)));
+        return __va(PFN_PHYS(page_to_pfn((struct page *)page)));
 }
 
 #if defined(CONFIG_HIGHMEM) && !defined(WANT_PAGE_VIRTUAL)
@@ -911,6 +911,8 @@ unsigned long unmap_vmas(struct mmu_gather *tlb,
  * @pte_entry: if set, called for each non-empty PTE (4th-level) entry
  * @pte_hole: if set, called for each hole at all levels
  * @hugetlb_entry: if set, called for each hugetlb entry
+ *                 *Caution*: The caller must hold mmap_sem() if @hugetlb_entry
+ *                            is used.
  *
  * (see walk_page_range for more details)
  */
@@ -986,6 +988,8 @@ int get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 int get_user_pages_fast(unsigned long start, int nr_pages, int write,
                         struct page **pages);
 struct page *get_dump_page(unsigned long addr);
+extern int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
+                            unsigned long address, unsigned int fault_flags);
 
 extern int try_to_release_page(struct page * page, gfp_t gfp_mask);
 extern void do_invalidatepage(struct page *page, unsigned long offset);
@@ -1409,8 +1413,7 @@ extern int do_munmap(struct mm_struct *, unsigned long, size_t);
 
 extern unsigned long do_brk(unsigned long, unsigned long);
 
-/* filemap.c */
-extern unsigned long page_unuse(struct page *);
+/* truncate.c */
 extern void truncate_inode_pages(struct address_space *, loff_t);
 extern void truncate_inode_pages_range(struct address_space *,
                                        loff_t lstart, loff_t lend);