On Fri, 10 May 2013, Frederic Weisbecker wrote: > In fact it would be nice to have DO_ONCE(something) and stuff whatever > we want inside. > All the printk_once() et. al could even be implemented using that.
Sounds nice, but if it's going to be used for something else than purely debugging output, one has to keep in mind that printk_once() as currently implemented is actually racy. I.e. you'd need to have locking (or at least cmpxchg) protecting the update of the static variable. -- Jiri Kosina SUSE Labs -- 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/
