take init_fs to saner place

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 959f552..2f3c2d4 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -12,6 +12,7 @@
 #include <net/net_namespace.h>
 
 extern struct files_struct init_files;
+extern struct fs_struct init_fs;
 
 #define INIT_KIOCTX(name, which_mm) \
 {							\