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Removes the process waitqueue, so that threads can only wait on the thread waitqueue. Whenever there is process work to do, pick a thread and wake it up. Having the caller pick a thread is helpful for things like priority inheritance. This also fixes an issue with using epoll(), since we no longer have to block on different waitqueues. Signed-off-by: Martijn Coenen <maco@android.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>