lockdep/selftest: Add a R-L/L-W test case specific to chain cache behavior

	MU(Y1); // should fail

}

/*

 * read_lock(A)

 * spin_lock(B)

 *		spin_lock(B)

 *		write_lock(A)

 *

 * This test case is aimed at poking whether the chain cache prevents us from

 * detecting a read-lock/lock-write deadlock: if the chain cache doesn't differ

 * read/write locks, the following case may happen

 *

 * 	{ read_lock(A)->lock(B) dependency exists }

 *

 * 	P0:

 * 	lock(B);

 * 	read_lock(A);

 *

 *	{ Not a deadlock, B -> A is added in the chain cache }

 *

 *	P1:

 *	lock(B);

 *	write_lock(A);

 *

 *	{ B->A found in chain cache, not reported as a deadlock }

 *

 */

static void rlock_chaincache_ABBA1(void)

{

	RL(X1);

	L(Y1);

	U(Y1);

	RU(X1);

	L(Y1);

	RL(X1);

	RU(X1);

	U(Y1);

	L(Y1);

	WL(X1);

	WU(X1);

	U(Y1); // should fail

}

/*

 * read_lock(A)

 * spin_lock(B)

	pr_cont("             |");

	dotest(rwsem_ABBA3, FAILURE, LOCKTYPE_RWSEM);

	print_testname("chain cached mixed R-L/L-W ABBA");

	pr_cont("             |");

	dotest(rlock_chaincache_ABBA1, FAILURE, LOCKTYPE_RWLOCK);

	printk("  --------------------------------------------------------------------------\n");

	/*