Messages in this thread | | | Date | Tue, 10 Oct 2006 15:59:37 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [PATCH] Fix WARN_ON / WARN_ON_ONCE regression |
| |
Steven Rostedt wrote: > In todays world, SMP is becoming more and more common (still waiting to > get that DualCore cell phone). So that means that writing to a variable > is going to carry more weight than it use to, and gcc needs to take note > of this. So, to avoid a short condition jump by adding a write to > memory, is not going to save anying. >
In general shared variables are going to be pretty rare, and its reasonable for gcc to assume they aren't. But it would be nice to have a good way to solve cases like this (though it seems like (condition) && __warn_once is the right way to go here anyway).
J - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |