ddb/db_active.h: New home for extern db_active.

This can be included unconditionally, and db_active can then be
queried unconditionally; if DDB is not in the kernel, then db_active
is a constant zer

ddb/db_active.h: New home for extern db_active.

This can be included unconditionally, and db_active can then be
queried unconditionally; if DDB is not in the kernel, then db_active
is a constant zero. Reduces need for #include opt_ddb.h, #ifdef DDB.

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malloc(9) -> kmem(9)

in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

MD rnd.h cleanups. Please let me know if I broke anything!

Merge tls-earlyentropy branch into HEAD.

Add d_discard to all struct cdevsw instances I could find.

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

Remove unneeded dependencies

Exclude sscom_init() prototype definition when its not declared later

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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Cleanup sscom to make more SoC invariant

Delete unused variables for new gcc.

For a polled console incoming characters are buffered on output.
The buffer is never passed to the regular tty routines and can
survive from early boot to halt where it is read by the "press
any cont

For a polled console incoming characters are buffered on output.
The buffer is never passed to the regular tty routines and can
survive from early boot to halt where it is read by the "press
any continue to reboot" loops.
As a workaround, just kill the read-ahead buffer when switching
from and to polled mode.

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

- add MBR editing menu to sysinst.
- fix typos in timecounter names.
- make sure to drain Tx FIFO to avoid clobbering
kernel boot messages.
- allow to have the 3rd UART.
- add missing time-of-day c

- add MBR editing menu to sysinst.
- fix typos in timecounter names.
- make sure to drain Tx FIFO to avoid clobbering
kernel boot messages.
- allow to have the 3rd UART.
- add missing time-of-day clock support.

Ok by releng.

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fix the build

Entropy-pool implementation move and cleanup.

1) Move core entropy-pool code and source/sink/sample management code
to sys/kern from sys/dev.

2) Remove use of NRND as test for presence of entrop

Entropy-pool implementation move and cleanup.

1) Move core entropy-pool code and source/sink/sample management code
to sys/kern from sys/dev.

2) Remove use of NRND as test for presence of entropy-pool code throughout
source tree.

3) Remove use of RND_ENABLED in device drivers as microoptimization to
avoid expensive operations on disabled entropy sources; make the
rnd_add calls do this directly so all callers benefit.

4) Fix bug in recent rnd_add_data()/rnd_add_uint32() changes that might
have lead to slight entropy overestimation for some sources.

5) Add new source types for environmental sensors, power sensors, VM
system events, and skew between clocks, with a sample implementation
for each.

ok releng to go in before the branch due to the difficulty of later
pullup (widespread #ifdef removal and moved files). Tested with release
builds on amd64 and evbarm and live testing on amd64.

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Add FriendlyARM Mini2440 support.
- new code for Samsung S3C2440 SoC.
- update for other S3C2xx0.
This port was done by Paul Fleischer.

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

Make this one build again.

Simplify the device-activation hook. Move some of the device
deactivation to the detachment routine, where it belongs.

Use lwp_getpcb() on ARM (and acorn26/32), clean from struct user usage.

use device_lookup_private to get softc

Remove clause 3 and 4 from TNF licenses

Use the softint API.

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