On Wed, Nov 26, 2014 at 11:05:04AM +0100, David Hildenbrand wrote: > > What's the path you are trying to debug? > > Well, we had a problem where we held a spin_lock and called > copy_(from|to)_user(). We experienced very random deadlocks that took some guy > almost a week to debug. The simple might_sleep() check would have showed this > error immediately.
This must have been a very old kernel. A modern kernel will return an error from copy_to_user. Which is really the point of the patch you are trying to revert. -- 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/
