init_mount
err = init_mount("devtmpfs", "dev", "devtmpfs", DEVTMPFS_MFLAGS, NULL);
err = init_mount("devtmpfs", "/", "devtmpfs", DEVTMPFS_MFLAGS, NULL);
int __init init_mount(const char *dev_name, const char *dir_name,
ret = init_mount(name, "/root", fs, flags, data_page);