Re: [PATCH] Fix WARN_ON / WARN_ON_ONCE regression

[Jeremy Fitzhardinge]

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@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/