GPIB framework.

Merge thorpej-cfargs2.

branches: 1.18.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.17.34;
KNF. No functional change.

branches: 1.16.14;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.15.12; 1.15.22;
Make compile with options DEBUG.

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.10.8; 1.10.14;
Remove clause 3 and 4 from TNF licenses

branches: 1.9.36; 1.9.38; 1.9.40;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.8.2;
Make it compile.

branches: 1.7.8;
integrate kauth.

Use device_private().

Use device_parent().

branches: 1.4.4; 1.4.6; 1.4.8; 1.4.10; 1.4.12;
merge ktrace-lwp.

s/locdesc_t/int/g

branches: 1.2.12;
a round of autoconf cleanup:
-convert submatch() style functions (passed to config_search() or
config_found_sm()) to the locator passing variants
-pass interface attributes in some cases
-make submatch() functions look uniformly as far as possible
-avoid macros which just hide cfdata members, and reduce dependencies
on "locators.h"

branches: 1.1.2;
Support block devices speaking CS80/SS80 protocol over gpib.

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

branches: 1.5.34; 1.5.44;
Remove clause 3 and 4 from TNF licenses

branches: 1.4.6; 1.4.8; 1.4.10;
Convert many of the uses of __attribute__ to equivalent
__packed, __unused and __dead macros from cdefs.h

branches: 1.3.46; 1.3.52; 1.3.56; 1.3.60;
merge ktrace-lwp.

branches: 1.2.12;
Spell removable with only two es. Inspired by jmc@openbsd.

branches: 1.1.2;
Support block devices speaking CS80/SS80 protocol over gpib.

Add missing initialization of sc_dev.

branches: 1.30.4;
Improve fallthrough statement wording in dev/gpib/ct.c

Fixes build with kUBSan on NetBSD/i386.

branches: 1.29.4;
Kill some more extern struct cfdriver declarations.

Down with externs in .c!

branches: 1.28.10;
KNF. No functional change.

branches: 1.27.4;
Add d_discard to all struct cdevsw instances I could find.

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

Add d_discard to all struct bdevsw instances I could find.

I've set them all to nodiscard. Some of them (wd, dk, vnd, ld,
raidframe, maybe cgd) should be implemented for real.

branches: 1.25.2;
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.

branches: 1.24.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.23.4; 1.23.14;
Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.22.4; 1.22.6; 1.22.8;
Fix warnings of printf(9) format.

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.17.2;
g/c BUFQ_FOO() macros and use bufq_foo() directly.

branches: 1.16.4;
- use device_lookup_private to get softc
- ansify

branches: 1.15.2; 1.15.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.14.2; 1.14.4;
use aprint_*_dev and device_xname

branches: 1.13.6;
Merge vmlocking2 to head.

branches: 1.12.4; 1.12.6; 1.12.10;
brelse() stragglers.

branches: 1.11.4; 1.11.6; 1.11.8; 1.11.10;
It's not a good idea for device drivers to modify b_flags, as they don't
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.

branches: 1.10.2; 1.10.10;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.9.2;
Complete initializers, teach drivers that we moved from struct proc to
struct lwp, sprinkle some needed const qualifiers.

branches: 1.8.8;
Use device_private().

Use device_parent().

branches: 1.6.4; 1.6.6; 1.6.8; 1.6.10; 1.6.12;
merge ktrace-lwp.

- change the way to specify a bufq strategy. (by string rather than by number)
- rather than embedding bufq_state in driver softc,
have a pointer to the former.
- move bufq related functions from kern/subr_disk.c to kern/subr_bufq.c.
- rename method to strategy for consistency.
- move some definitions which don't need to be exposed to the rest of kernel
from sys/bufq.h to sys/bufq_impl.h.
(is it better to move it to kern/ or somewhere?)
- fix some obvious breakage in dev/qbus/ts.c. (not tested)

branches: 1.4.4;
nuke trailing whitespace

branches: 1.3.4; 1.3.6;
move buffer queue related stuffs from buf.h to their own header, bufq.h.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.1.2;
Port hp300 driver for cartridge-style tapes to MI gpib framework.

Convert many of the uses of __attribute__ to equivalent
__packed, __unused and __dead macros from cdefs.h

branches: 1.3.46; 1.3.52; 1.3.56; 1.3.60;
merge ktrace-lwp.

branches: 1.2.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.1.2;
Port hp300 driver for cartridge-style tapes to MI gpib framework.

GPIB framework.

Merge thorpej-cfargs2.

branches: 1.25.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.24.10;
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.

branches: 1.23.18;
KNF. No functional change.

branches: 1.22.4;
Add d_discard to all struct cdevsw instances I could find.

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

branches: 1.21.2;
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.

branches: 1.20.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.19.12; 1.19.22;
Make compile with options DEBUG.

MALLOC() -> malloc()

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.13.4; 1.13.10;
- use device_lookup_private to get softc
- ansify

branches: 1.12.2; 1.12.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.11.2; 1.11.4;
use aprint_*_dev and device_xname

branches: 1.10.36;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.9.2;
Complete initializers, teach drivers that we moved from struct proc to
struct lwp, sprinkle some needed const qualifiers.

branches: 1.8.8;
Use device_private().

Use device_cfdata().

branches: 1.6.4; 1.6.6; 1.6.8; 1.6.10; 1.6.12;
merge ktrace-lwp.

s/locdesc_t/int/g

branches: 1.4.4;
nuke trailing whitespace

de-__P

branches: 1.2.4; 1.2.6;
a round of autoconf cleanup:
-convert submatch() style functions (passed to config_search() or
config_found_sm()) to the locator passing variants
-pass interface attributes in some cases
-make submatch() functions look uniformly as far as possible
-avoid macros which just hide cfdata members, and reduce dependencies
on "locators.h"

branches: 1.1.2;
GPIB framework.

More on PR 41200: headers that declare ioctls should include sys/ioccom.h.
This covers (I think) all the MI headers outside of external/ (and dist/).

branches: 1.3.120; 1.3.140;
merge ktrace-lwp.

Add a final newline.

branches: 1.1.2; 1.1.10; 1.1.12;
GPIB framework.

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

branches: 1.4.34; 1.4.44;
Remove clause 3 and 4 from TNF licenses

branches: 1.3.70; 1.3.72; 1.3.74;
merge ktrace-lwp.

nuke trailing whitespace

branches: 1.1.2; 1.1.10; 1.1.12;
GPIB framework.

This driver is incomplete and doens't even compile, but make it
use CFATTACH_DECL_NEW() anyway.

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

branches: 1.11.12; 1.11.22;
struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.7.4; 1.7.12; 1.7.18;
use aprint_*_dev and device_xname

branches: 1.6.58;
Use device_private().

Use device_unit().

branches: 1.4.4; 1.4.6; 1.4.8; 1.4.10; 1.4.12;
merge ktrace-lwp.

branches: 1.3.4;
nuke trailing whitespace

branches: 1.2.8; 1.2.10;
add missing __KERNEL_RCSID() and RCSID comment

branches: 1.1.2;
First-go at hil-over-gpib. Doesn't do much.

Mark unreachable branch with __unreachable() to fix i386/ALL build.

Add missing initialization of sc_dev.

branches: 1.32.4;
Add missing FALLTHROUGH in gpib/mt.c

Requested by GCC in NetBSD/i386 kUBSan KCOV build.

branches: 1.31.4;
Kill some more extern struct cfdriver declarations.

Down with externs in .c!

branches: 1.30.10;
- Use aprint*() instead of printf() in xxx_attach().
- Add missing aprint_naive("\n");
- KNF

branches: 1.29.4;
Add d_discard to all struct cdevsw instances I could find.

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

Add d_discard to all struct bdevsw instances I could find.

I've set them all to nodiscard. Some of them (wd, dk, vnd, ld,
raidframe, maybe cgd) should be implemented for real.

branches: 1.27.2;
remove unused

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.

branches: 1.25.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.24.4; 1.24.14;
Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.23.4; 1.23.6; 1.23.8;
Convert tsleep(&lbolt) to kpause(). Make ltsleep/mtsleep on lbolt
illegal. I examined all places where lbolt is referenced to make
sure there were pointer aliases of it passed to tsleep, but put a
KASSERT in m/ltsleep() just to be sure.

Fix warnings of printf(9) format.

Don't pass a buffer to physio(), let it be allocated dynamically.

This leaves only scsipi and atapi doing the same.

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.16.2;
g/c BUFQ_FOO() macros and use bufq_foo() directly.

branches: 1.15.4;
- use device_lookup_private to get softc
- ansify

branches: 1.14.2; 1.14.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.13.2; 1.13.4;
use aprint_*_dev and device_xname

branches: 1.12.6;
Merge vmlocking2 to head.

branches: 1.11.6; 1.11.12; 1.11.14; 1.11.18; 1.11.22;
It's not a good idea for device drivers to modify b_flags, as they don't
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.

branches: 1.10.2;
Merge some of the less invasive changes from the vmlocking branch:

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

branches: 1.9.2; 1.9.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.8.2;
Rename the B_XXX flag to B_DEVPRIVATE flag since it was never used for
debugging and its main use is in device drivers. Its used there to signal
that the flagged buffer has a special meaning or should be handled
differently.

OK'd by Bill Sudenmund on tech-kern.

Complete initializers, teach drivers that we moved from struct proc to
struct lwp, sprinkle some needed const qualifiers.

branches: 1.6.8;
Use device_private().

branches: 1.5.4; 1.5.6; 1.5.8; 1.5.10; 1.5.12;
merge ktrace-lwp.

- change the way to specify a bufq strategy. (by string rather than by number)
- rather than embedding bufq_state in driver softc,
have a pointer to the former.
- move bufq related functions from kern/subr_disk.c to kern/subr_bufq.c.
- rename method to strategy for consistency.
- move some definitions which don't need to be exposed to the rest of kernel
from sys/bufq.h to sys/bufq_impl.h.
(is it better to move it to kern/ or somewhere?)
- fix some obvious breakage in dev/qbus/ts.c. (not tested)

branches: 1.3.12;
move buffer queue related stuffs from buf.h to their own header, bufq.h.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.1.2;
Port hp300 driver for magnetic tapes to MI gpib framework.

fix typos in documented error codes.

s/corect/correct/ in comment.

s/recieve/receive/

branches: 1.4.164;
merge ktrace-lwp.

nuke trailing whitespace

branches: 1.2.8; 1.2.10;
occured -> occurred. From Peter Postma.

branches: 1.1.2;
Port hp300 driver for magnetic tapes to MI gpib framework.

Add missing initialization of sc_dev.

branches: 1.24.4;
Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)

branches: 1.23.2; 1.23.4;
Kill some more extern struct cfdriver declarations.

Down with externs in .c!

branches: 1.22.20;
Add d_discard to all struct cdevsw instances I could find.

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

branches: 1.21.2;
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.

branches: 1.20.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.19.12; 1.19.22;
Fix warnings of printf(9) format.

Add a missing parentheses. PR kern/41859

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.13.4; 1.13.10;
- use device_lookup to get device_t
- use device_lookup_private to get softc
- ansify

branches: 1.12.2; 1.12.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.11.2; 1.11.4;
use aprint_*_dev and device_xname

branches: 1.10.28;
Merge some of the less invasive changes from the vmlocking branch:

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

branches: 1.9.2; 1.9.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.8.2;
Fix spllowersoftclock() fallout.

Complete initializers, teach drivers that we moved from struct proc to
struct lwp, sprinkle some needed const qualifiers.

branches: 1.6.8;
Use device_private().

Use device_unit().

branches: 1.4.4; 1.4.6; 1.4.8; 1.4.10; 1.4.12;
merge ktrace-lwp.

branches: 1.3.4;
nuke trailing whitespace

branches: 1.2.8; 1.2.10;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.1.2;
Port the hp300 ppi driver to the MI gpib framework.

merge ktrace-lwp.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.1.2;
Port the hp300 ppi driver to the MI gpib framework.

fix various typos in comments.

s/threshhold/threshold

branches: 1.43.6;
s/parition/partition/

Kill some more extern struct cfdriver declarations.

Down with externs in .c!

KNF. No functional change.

Convert sys/dev to use <sys/rndsource.h>.

We have three sets of DTYPE_ constants in the kernel:
altq Drop Type
disklabel Disk Type
file Descriptor Type
(not to mention constants that contain the string DTYPE).
Let's make them two, by changing the disklabel one to be DisK TYPE since the
other disklabel constants seem to do that. Not many userland programs use
these constants (and the ones that they do are mostly in ifdefs). They will
be fixed shortly.

fix typo

make more drivers use disk_ioctl, and add a dev parameter to it so that
we can merge the "easy" disklabel ioctls to it. Ultimately all this will
go do dk_ioctl once all the drivers have been converted.

branches: 1.36.4;
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.

Add d_discard to all struct bdevsw instances I could find.

I've set them all to nodiscard. Some of them (wd, dk, vnd, ld,
raidframe, maybe cgd) should be implemented for real.

branches: 1.33.2;
remove unused

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.

branches: 1.31.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.30.6;
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.

branches: 1.29.2;
First step of random number subsystem rework described in
<20111022023242.BA26F14A158@mail.netbsd.org>. This change includes
the following:

An initial cleanup and minor reorganization of the entropy pool
code in sys/dev/rnd.c and sys/dev/rndpool.c. Several bugs are
fixed. Some effort is made to accumulate entropy more quickly at
boot time.

A generic interface, "rndsink", is added, for stream generators to
request that they be re-keyed with good quality entropy from the pool
as soon as it is available.

The arc4random()/arc4randbytes() implementation in libkern is
adjusted to use the rndsink interface for rekeying, which helps
address the problem of low-quality keys at boot time.

An implementation of the FIPS 140-2 statistical tests for random
number generator quality is provided (libkern/rngtest.c). This
is based on Greg Rose's implementation from Qualcomm.

A new random stream generator, nist_ctr_drbg, is provided. It is
based on an implementation of the NIST SP800-90 CTR_DRBG by
Henric Jungheim. This generator users AES in a modified counter
mode to generate a backtracking-resistant random stream.

An abstraction layer, "cprng", is provided for in-kernel consumers
of randomness. The arc4random/arc4randbytes API is deprecated for
in-kernel use. It is replaced by "cprng_strong". The current
cprng_fast implementation wraps the existing arc4random
implementation. The current cprng_strong implementation wraps the
new CTR_DRBG implementation. Both interfaces are rekeyed from
the entropy pool automatically at intervals justifiable from best
current cryptographic practice.

In some quick tests, cprng_fast() is about the same speed as
the old arc4randbytes(), and cprng_strong() is about 20% faster
than rnd_extract_data(). Performance is expected to improve.

The AES code in src/crypto/rijndael is no longer an optional
kernel component, as it is required by cprng_strong, which is
not an optional kernel component.

The entropy pool output is subjected to the rngtest tests at
startup time; if it fails, the system will reboot. There is
approximately a 3/10000 chance of a false positive from these
tests. Entropy pool _input_ from hardware random numbers is
subjected to the rngtest tests at attach time, as well as the
FIPS continuous-output test, to detect bad or stuck hardware
RNGs; if any are detected, they are detached, but the system
continues to run.

A problem with rndctl(8) is fixed -- datastructures with
pointers in arrays are no longer passed to userspace (this
was not a security problem, but rather a major issue for
compat32). A new kernel will require a new rndctl.

The sysctl kern.arandom() and kern.urandom() nodes are hooked
up to the new generators, but the /dev/*random pseudodevices
are not, yet.

Manual pages for the new kernel interfaces are forthcoming.

branches: 1.28.4;
Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.27.4; 1.27.6; 1.27.8;
- fix warnings of printf(9) format and void pointer arithmetic
- use DTYPE_HPIB for now instead of nonexistent DTYPE_GPIB

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.22.2;
g/c BUFQ_FOO() macros and use bufq_foo() directly.

branches: 1.21.4;
- use device_lookup_private to get softc
- ansify

branches: 1.20.2; 1.20.4;
Remove clause 3 and 4 from TNF licenses

branches: 1.19.2; 1.19.4;
use aprint_*_dev and device_xname

branches: 1.18.18;
Merge disk init changes from the vmlocking branch. These seperate init /
destroy of 'struct disk' from attach / detach.

branches: 1.17.4; 1.17.6; 1.17.8; 1.17.10;
It's not a good idea for device drivers to modify b_flags, as they don't
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.

branches: 1.16.2;
Merge some of the less invasive changes from the vmlocking branch:

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

branches: 1.15.2; 1.15.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.14.2;
Complete initializers, teach drivers that we moved from struct proc to
struct lwp, sprinkle some needed const qualifiers.

branches: 1.13.8;
integrate kauth.

Make i/o statistics collection more generic, include tape drives and
nfs mounts in the set of devices that statistics will be reported on.

Use device_private().

Use device_unit().

Use device_parent().

branches: 1.8.2; 1.8.4; 1.8.6;
Fix some typos.

branches: 1.7.2; 1.7.4; 1.7.6;
merge ktrace-lwp.

- change the way to specify a bufq strategy. (by string rather than by number)
- rather than embedding bufq_state in driver softc,
have a pointer to the former.
- move bufq related functions from kern/subr_disk.c to kern/subr_bufq.c.
- rename method to strategy for consistency.
- move some definitions which don't need to be exposed to the rest of kernel
from sys/bufq.h to sys/bufq_impl.h.
(is it better to move it to kern/ or somewhere?)
- fix some obvious breakage in dev/qbus/ts.c. (not tested)

branches: 1.5.4;
nuke trailing whitespace

branches: 1.4.4; 1.4.6;
move buffer queue related stuffs from buf.h to their own header, bufq.h.

Remove the last vestiges of COMPAT_NOLABEL. It's been 10 years; label
your disks already.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.1.2;
Port hp300 driver for HPIB/GPIB disks to MI gpib framework.

s/indicies/indices/ in comments.

Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.5.32; 1.5.38; 1.5.40;
Convert many of the uses of __attribute__ to equivalent
__packed, __unused and __dead macros from cdefs.h

branches: 1.4.46; 1.4.52; 1.4.56; 1.4.60;
merge ktrace-lwp.

branches: 1.3.16;
boundary, not boundry. Inspired by Tom Cosgrove.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.1.2;
Port hp300 driver for HPIB/GPIB disks to MI gpib framework.