
. unpause() and revive() can race - revive() can run during a device i/o unblock, causing two sendnb()s to occur, and the 2nd one to fail . this can easily happen when a process is blocking on tty and is then killed by a signal - tty cancels the i/o and then kills the process by a signal Change-Id: Ia319acaedfa336b78c030a2c4af7246959bdcf87
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