K 10 svn:author V 6 kevans K 8 svn:date V 27 2019-12-22T19:06:45.682207Z K 7 svn:log V 267 MFC r355206, r355212, r355257, r355271: tty nits r355206: tty_pts: don't rely on tty header pollution for sys/mutex.h r355212: tty_rel_gone: add locking assertion r355257: usb: remove some extraneous tty.h includes r355271: Remove more needless includes END