On Mon, 17 Dec 2012 16:59:00 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote: > Otherwise it seems like we can get stuck with concurrent waiters. > Right now this /shouldn't/ be a problem, since all pending pageflip > waiters are serialized by the one mode_config.mutex, so there's at > most on waiter. But better paranoid than sorry, since this is tricky > code. Hmm. BUG_ON(waitqueue_active()) before joining the waitqueue? -Chris -- Chris Wilson, Intel Open Source Technology Centre
