45333cdc92
when mountmux() completes a request for another process, enforce odering of the loads and stores to the request prior to writing q->done = 1 so mntflushfree() sees q->done != 0 only when the request has actually completed. otherwise, the q->done = 1 store could have been reordered before the load from q->z, reading from already freed request and causing spurious wakeups. removing unused mntstats callback. use nil for pointers instead of 0. |
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