original_kernel/tools/lib/lockdep/tests/WW.c

#include <liblockdep/rwlock.h>

void main(void)
{
	pthread_rwlock_t a, b;

	pthread_rwlock_init(&a, NULL);
	pthread_rwlock_init(&b, NULL);

	pthread_rwlock_wrlock(&a);
	pthread_rwlock_rdlock(&b);
	pthread_rwlock_wrlock(&a);
}