example to extract private kernel structure definition using BTF

gistfile1.txt

$ pahole vmlinux |  sed -n '/^struct check_mount/{:start /};/!{N;b start}; p }'
struct check_mount {
	struct vfsmount *          mnt;                  /*     0     8 */
	unsigned int               mounted;              /*     8     4 */

	/* size: 16, cachelines: 1, members: 2 */
	/* padding: 4 */
	/* last cacheline: 16 bytes */
};
$ # defined in fs/dcache.c