lockdep/selftest: Introduce recursion3

#include "locking-selftest-wlock.h"

GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft_wlock)

#undef E1

#undef E2

#undef E3

/*

 * read-lock / write-lock recursion that is unsafe.

 *

 * A is a ENABLED_*_READ lock

 * B is a USED_IN_*_READ lock

 *

 * read_lock(A);

 *			write_lock(B);

 * <interrupt>

 * read_lock(B);

 * 			write_lock(A); // if this one is read_lock(), no deadlock

 */

#define E1()				\

					\

	IRQ_DISABLE();			\

	WL(B);				\

	LOCK(A);			\

	UNLOCK(A);			\

	WU(B);				\

	IRQ_ENABLE();

#define E2()				\

					\

	RL(A);				\

	RU(A);				\

#define E3()				\

					\

	IRQ_ENTER();			\

	RL(B);				\

	RU(B);				\

	IRQ_EXIT();

/*

 * Generate 24 testcases:

 */

#include "locking-selftest-hardirq.h"

#include "locking-selftest-rlock.h"

GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_hard_rlock)

#include "locking-selftest-wlock.h"

GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_hard_wlock)

#include "locking-selftest-softirq.h"

#include "locking-selftest-rlock.h"

GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_soft_rlock)

#include "locking-selftest-wlock.h"

GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion3_soft_wlock)

#ifdef CONFIG_DEBUG_LOCK_ALLOC

# define I_SPINLOCK(x)	lockdep_reset_lock(&lock_##x.dep_map)

# define I_RWLOCK(x)	lockdep_reset_lock(&rwlock_##x.dep_map)

	DO_TESTCASE_6x2x2RW("irq read-recursion", irq_read_recursion);

	DO_TESTCASE_6x2x2RW("irq read-recursion #2", irq_read_recursion2);

	DO_TESTCASE_6x2x2RW("irq read-recursion #3", irq_read_recursion3);

	ww_tests();