consolidate pipe file creation

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index e1ac1ce..e16dcb3 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -162,4 +162,6 @@
 long pipe_fcntl(struct file *, unsigned int, unsigned long arg);
 struct pipe_inode_info *get_pipe_info(struct file *file);
 
+int create_pipe_files(struct file **, int);
+
 #endif