new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c
index 88cad6b..900aa4e 100644
--- a/drivers/video/fb_defio.c
+++ b/drivers/video/fb_defio.c
@@ -69,7 +69,7 @@
 int fb_deferred_io_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
 	struct fb_info *info = file->private_data;
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	int err = filemap_write_and_wait_range(inode->i_mapping, start, end);
 	if (err)
 		return err;
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 3ff0105..bf01980 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -727,7 +727,7 @@
  */
 static struct fb_info *file_fb_info(struct file *file)
 {
-	struct inode *inode = file->f_path.dentry->d_inode;
+	struct inode *inode = file_inode(file);
 	int fbidx = iminor(inode);
 	struct fb_info *info = registered_fb[fbidx];
 
diff --git a/drivers/video/msm/mdp.c b/drivers/video/msm/mdp.c
index f2566c1..113c787 100644
--- a/drivers/video/msm/mdp.c
+++ b/drivers/video/msm/mdp.c
@@ -261,7 +261,7 @@
 	if (f.file == NULL)
 		return -1;
 
-	if (MAJOR(f.file->f_dentry->d_inode->i_rdev) == FB_MAJOR) {
+	if (MAJOR(file_inode(f.file)->i_rdev) == FB_MAJOR) {
 		*start = info->fix.smem_start;
 		*len = info->fix.smem_len;
 	} else