On Tue, Nov 26, 2013 at 01:07:25AM +0000, Ma, Xindong wrote: > I've already aware that they've protected by spinlock, this is why I adding a memory barrier to fix it. That doesn't make sense.. the spinlocks should provide the required serialization, there's nothing to fix. > I reproduced this issue several times on android which running on IA dual core. I think you need to be more specific, in particular, if spinlocks do not provide serialization on your IA32 device, I'd call that thing broken. Adding random memory barriers is _WRONG_. -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html