Ed Schouten 18f5477167 Reintroduce the cioctl() hook in the TTY layer for digi(4).
The cioctl() hook can be used by drivers to add ioctls to the *.init and
*.lock devices. This commit breaks the ttydevsw ABI, since this
structure didn't provide any padding. To prevent ABI breakage in the
future, add a tsw_spare.

Submitted by:	Peter Jeremy <peter jeremy alcatel lucent com>
Obtained from:	kern/152254 (slightly modified)
2011-07-02 13:54:20 +00:00
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MFC
2011-05-31 21:22:44 +00:00
MFC
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