new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/char/tb0219.c b/drivers/char/tb0219.c
index 34c63f8..47b9fdf 100644
--- a/drivers/char/tb0219.c
+++ b/drivers/char/tb0219.c
@@ -164,7 +164,7 @@
 	unsigned int minor;
 	char value;
 
-	minor = iminor(file->f_path.dentry->d_inode);
+	minor = iminor(file_inode(file));
 	switch (minor) {
 	case 0:
 		value = get_led();
@@ -200,7 +200,7 @@
 	int retval = 0;
 	char c;
 
-	minor = iminor(file->f_path.dentry->d_inode);
+	minor = iminor(file_inode(file));
 	switch (minor) {
 	case 0:
 		type = TYPE_LED;