On 10/31/2015 07:54 PM, Davidlohr Bueso wrote: >> However, a wake_q keeps a reference to a task, so exiting is >> not a danger. As long as wake_q_add precedes setting r_msg, >> all is well. > > Yes, and this confirms that we still rely on the implicit barrier > from the cmpxchg as tglx mentioned. As such, we also need to keep > the pairing when reading 'r_msg' in do_msgrcv(), instead of dropping > the comments.
Okay, I took the memory-barrier comment from your mqueue patch and adjusted. > > Thanks, > Davidlohr Sebastian -- 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/
