3 files changed, 6 insertions, 5 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 4e686a099465..74a907b8b950 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -769,6 +769,7 @@ struct file {
         } f_u;
         struct path             f_path;
 #define f_dentry        f_path.dentry
+        struct inode            *f_inode;       /* cached value */
         const struct file_operations    *f_op;
 
         /*
@@ -2217,7 +2218,7 @@ static inline bool execute_ok(struct inode *inode)
 
 static inline struct inode *file_inode(struct file *f)
 {
-        return f->f_path.dentry->d_inode;
+        return f->f_inode;
 }
 
 /*
diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h
index d0ae3a84bcfb..729eded4b24f 100644
--- a/include/linux/fs_struct.h
+++ b/include/linux/fs_struct.h
@@ -17,8 +17,8 @@ struct fs_struct {
 extern struct kmem_cache *fs_cachep;
 
 extern void exit_fs(struct task_struct *);
-extern void set_fs_root(struct fs_struct *, struct path *);
-extern void set_fs_pwd(struct fs_struct *, struct path *);
+extern void set_fs_root(struct fs_struct *, const struct path *);
+extern void set_fs_pwd(struct fs_struct *, const struct path *);
 extern struct fs_struct *copy_fs_struct(struct fs_struct *);
 extern void free_fs_struct(struct fs_struct *);
 extern int unshare_fs_struct(void);
diff --git a/include/linux/path.h b/include/linux/path.h
index edc98dec6266..d1372186f431 100644
--- a/include/linux/path.h
+++ b/include/linux/path.h
@@ -9,8 +9,8 @@ struct path {
         struct dentry *dentry;
 };
 
-extern void path_get(struct path *);
-extern void path_put(struct path *);
+extern void path_get(const struct path *);
+extern void path_put(const struct path *);
 
 static inline int path_equal(const struct path *path1, const struct path *path2)
 {