On Tue, Apr 14, 2015 at 7:55 PM, Paul E. McKenney <paul...@linux.vnet.ibm.com> wrote: > > Does the (currently being tested) patch below fix things up? If not, > please fill me in on the further error of my ways.
Looks ok. That said, couldn't that last dummy gp_init_delay variable: > +/* Delay in jiffies for grace-period initialization delays, debug only. */ > +#ifdef CONFIG_RCU_TORTURE_TEST_SLOW_INIT > +static int gp_init_delay = CONFIG_RCU_TORTURE_TEST_SLOW_INIT_DELAY; > module_param(gp_init_delay, int, 0644); > +#else /* #ifdef CONFIG_RCU_TORTURE_TEST_SLOW_INIT */ > +static const int gp_init_delay; > +#endif /* #else #ifdef CONFIG_RCU_TORTURE_TEST_SLOW_INIT */ be just a #define gp_init_delay 0 for the non-CONFIG_RCU_TORTURE_TEST_SLOW_INIT case, so that the code that then does + if (gp_init_delay > 0 && + !(rsp->gpnum % (rcu_num_nodes * PER_RCU_NODE_PERIOD))) would just trivially compile away. I guess the compiler *might* see a 'static const int' that is never touched and realize it's always zero, but it's not obvious that will be the case. Linus Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/