new helper: file_inode(file)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/alpha/kernel/srm_env.c b/arch/alpha/kernel/srm_env.c
index b9fc6c3..e64559f 100644
--- a/arch/alpha/kernel/srm_env.c
+++ b/arch/alpha/kernel/srm_env.c
@@ -111,7 +111,7 @@
 				  size_t count, loff_t *pos)
 {
 	int res;
-	srm_env_t	*entry = PDE(file->f_path.dentry->d_inode)->data;
+	srm_env_t	*entry = PDE(file_inode(file))->data;
 	char		*buf = (char *) __get_free_page(GFP_USER);
 	unsigned long	ret1, ret2;