11c27b644SPaul E. McKenneyC Z6.0+pooncelock+pooncelock+pombonce 21c27b644SPaul E. McKenney 31c27b644SPaul E. McKenney{} 41c27b644SPaul E. McKenney 51c27b644SPaul E. McKenneyP0(int *x, int *y, spinlock_t *mylock) 61c27b644SPaul E. McKenney{ 71c27b644SPaul E. McKenney spin_lock(mylock); 81c27b644SPaul E. McKenney WRITE_ONCE(*x, 1); 91c27b644SPaul E. McKenney WRITE_ONCE(*y, 1); 101c27b644SPaul E. McKenney spin_unlock(mylock); 111c27b644SPaul E. McKenney} 121c27b644SPaul E. McKenney 131c27b644SPaul E. McKenneyP1(int *y, int *z, spinlock_t *mylock) 141c27b644SPaul E. McKenney{ 151c27b644SPaul E. McKenney int r0; 161c27b644SPaul E. McKenney 171c27b644SPaul E. McKenney spin_lock(mylock); 181c27b644SPaul E. McKenney r0 = READ_ONCE(*y); 191c27b644SPaul E. McKenney WRITE_ONCE(*z, 1); 201c27b644SPaul E. McKenney spin_unlock(mylock); 211c27b644SPaul E. McKenney} 221c27b644SPaul E. McKenney 231c27b644SPaul E. McKenneyP2(int *x, int *z) 241c27b644SPaul E. McKenney{ 251c27b644SPaul E. McKenney int r1; 261c27b644SPaul E. McKenney 271c27b644SPaul E. McKenney WRITE_ONCE(*z, 2); 281c27b644SPaul E. McKenney smp_mb(); 291c27b644SPaul E. McKenney r1 = READ_ONCE(*x); 301c27b644SPaul E. McKenney} 311c27b644SPaul E. McKenney 321c27b644SPaul E. McKenneyexists (1:r0=1 /\ z=2 /\ 2:r1=0) 33