Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found

Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

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- remove unused but set variables.
- use __USE() where necessary.
- remove useless 'volatile' markers

kd.c:consinit() might be wrong for old proms, but i've not
changed it really.

split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

move cn_tab initializationt to cpu_startup

Rename ttymalloc() to tty_alloc(), and ttyfree() to tty_free() for
consistency. Remove some unnecessary malloc.h inclusions as well.

Remove clause 3 and 4 from TNF licenses

- Factor out too many copies of the same bit of tty code.
- Fix another tty signalling/wakeup problem.

Initialise the callbacks for tty.t_rstrt_ch in ttymalloc
as all drivers but Sun/SPARC's kd.c use the same arguments.
Separate callout_reset into callout_schedule and the initial
callout_setfunc using

Initialise the callbacks for tty.t_rstrt_ch in ttymalloc
as all drivers but Sun/SPARC's kd.c use the same arguments.
Separate callout_reset into callout_schedule and the initial
callout_setfunc using that.

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Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the v

Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

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Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

More spllowersoftclock() fallout.

Adapt MD code to KAUTH_DEVICE_TTY_OPEN. Patch from Matt Fleming, thanks!

Use the LWP cached credentials where sane.

integrate kauth.

merge ktrace-lwp.

Drop trailing whitespace.

ANSIify. Same code is generated.
While here, collect in one place prototypes that were scattered
throughout the file, apply static to prom_cn* consistently.

Change the driver open function's conditional for overriding exclusive tty
use from checking the proc's uid to suser(9), and account for the use of
privileges. Noted by David Holland in PR kern/3112

Change the driver open function's conditional for overriding exclusive tty
use from checking the proc's uid to suser(9), and account for the use of
privileges. Noted by David Holland in PR kern/31126.

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Allow sparc64-style attachment of mouse and keyboard via zstty, needed for
wscons support.
Reviewed by uwe.

Sprinkle some const

Rename PROM_getprop*() => prom_getprop*().

Use prom_getoption() and drop home-grown string-to-integer conversion code.

cc_callout does not belong to struct cons_channel, as it's only used
by sparc for PROM console input channel. Demote it to kd.c as a
static variable.

While there, use callout_schedule instead of ca

cc_callout does not belong to struct cons_channel, as it's only used
by sparc for PROM console input channel. Demote it to kd.c as a
static variable.

While there, use callout_schedule instead of callout_reset to
reschedule the PROM polling callout, and init prom_cons_channel
statically.

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