static inline void set_return_regs_changed(void)
{
#ifdef CONFIG_PPC_BOOK3S_64
- local_paca->hsrr_valid = 0;
- local_paca->srr_valid = 0;
+ WRITE_ONCE(local_paca->hsrr_valid, 0);
+ WRITE_ONCE(local_paca->srr_valid, 0);
#endif
}
case 0x1600:
case 0x1800:
validp = &local_paca->hsrr_valid;
- if (!*validp)
+ if (!READ_ONCE(*validp))
return;
srr0 = mfspr(SPRN_HSRR0);
break;
default:
validp = &local_paca->srr_valid;
- if (!*validp)
+ if (!READ_ONCE(*validp))
return;
srr0 = mfspr(SPRN_SRR0);
* such things will get caught most of the time, statistically
* enough to be able to get a warning out.
*/
- barrier();
-
- if (!*validp)
+ if (!READ_ONCE(*validp))
return;
- if (!warned) {
- warned = true;
+ if (!data_race(warned)) {
+ data_race(warned = true);
printk("%sSRR0 was: %lx should be: %lx\n", h, srr0, regs->nip);
printk("%sSRR1 was: %lx should be: %lx\n", h, srr1, regs->msr);
show_regs(regs);
}
- *validp = 0; /* fixup */
+ WRITE_ONCE(*validp, 0); /* fixup */
#endif
}