pipe_fs_type     1197 fs/pipe.c      static struct file_system_type pipe_fs_type = {
pipe_fs_type     1205 fs/pipe.c      	int err = register_filesystem(&pipe_fs_type);
pipe_fs_type     1208 fs/pipe.c      		pipe_mnt = kern_mount(&pipe_fs_type);
pipe_fs_type     1211 fs/pipe.c      			unregister_filesystem(&pipe_fs_type);