2 files changed, 5 insertions, 33 deletions

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 49b7053043ad..e6a71c82d204 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -1,6 +1,8 @@
 #ifndef _LINUX_HUGETLB_H
 #define _LINUX_HUGETLB_H
 
+#include <linux/fs.h>
+
 #ifdef CONFIG_HUGETLB_PAGE
 
 #include <linux/mempolicy.h>
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 3e9e8fec5a41..655094dc9440 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -10,7 +10,6 @@
 #include <linux/mmzone.h>
 #include <linux/rbtree.h>
 #include <linux/prio_tree.h>
-#include <linux/fs.h>
 #include <linux/mutex.h>
 #include <linux/debug_locks.h>
 #include <linux/backing-dev.h>
@@ -18,7 +17,9 @@
 
 struct mempolicy;
 struct anon_vma;
+struct file_ra_state;
 struct user_struct;
+struct writeback_control;
 
 #ifndef CONFIG_DISCONTIGMEM          /* Don't use mapnrs, do it properly */
 extern unsigned long max_mapnr;
@@ -861,38 +862,7 @@ struct shrinker {
 extern void register_shrinker(struct shrinker *);
 extern void unregister_shrinker(struct shrinker *);
 
-/*
- * Some shared mappigns will want the pages marked read-only
- * to track write events. If so, we'll downgrade vm_page_prot
- * to the private version (using protection_map[] without the
- * VM_SHARED bit).
- */
-static inline int vma_wants_writenotify(struct vm_area_struct *vma)
-{
-        unsigned int vm_flags = vma->vm_flags;
-
-        /* If it was private or non-writable, the write bit is already clear */
-        if ((vm_flags & (VM_WRITE|VM_SHARED)) != ((VM_WRITE|VM_SHARED)))
-                return 0;
-
-        /* The backer wishes to know when pages are first written to? */
-        if (vma->vm_ops && vma->vm_ops->page_mkwrite)
-                return 1;
-
-        /* The open routine did something to the protections already? */
-        if (pgprot_val(vma->vm_page_prot) !=
-            pgprot_val(protection_map[vm_flags &
-                    (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)]))
-                return 0;
-
-        /* Specialty mapping? */
-        if (vm_flags & (VM_PFNMAP|VM_INSERTPAGE))
-                return 0;
-
-        /* Can the mapping track the dirty pages? */
-        return vma->vm_file && vma->vm_file->f_mapping &&
-                mapping_cap_account_dirty(vma->vm_file->f_mapping);
-}
+int vma_wants_writenotify(struct vm_area_struct *vma);
 
 extern pte_t *FASTCALL(get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl));