new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/sh/mm/alignment.c b/arch/sh/mm/alignment.c
index 620fa7f..aea1485 100644
--- a/arch/sh/mm/alignment.c
+++ b/arch/sh/mm/alignment.c
@@ -140,7 +140,7 @@
 static ssize_t alignment_proc_write(struct file *file,
 		const char __user *buffer, size_t count, loff_t *pos)
 {
-	int *data = PDE(file->f_path.dentry->d_inode)->data;
+	int *data = PDE(file_inode(file))->data;
 	char mode;
 
 	if (count > 0) {