cwd is logically a vfs concept, so take it out from the bosom of
kern_descrip and into vfs_cwd. No functional change.

Make POSIX AIO loadable as a module.

Allow the POSIX semaphore code to be loaded as a module.

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

On the prompt for init path, print a simple usage line
if input strings are not valid path or command.
Per comments from perry@ and pgoyette@.

- if no usable init(8) program (listed in *initpaths[]) can be found,
set the RB_ASKNAME flag and prompt users for the init path, rather than
panicking with "no init".
- when prompting for the in

- if no usable init(8) program (listed in *initpaths[]) can be found,
set the RB_ASKNAME flag and prompt users for the init path, rather than
panicking with "no init".
- when prompting for the init path, support the special strings
"halt", "reboot", and "ddb", as well as a prompt for the root device.

Dissussed and no objection on tech-kern. Changes summary by apb@.

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don't expose ksyms_lock

Only init ksyms mutex if ksyms is present in the kernel

PR kern/38814 ksyms needs locking

- Make ksyms MT safe.
- Fix deadlock from an operation like "modload foo.lkm < /dev/ksyms".
- Fix uninitialized structure members.
- Reduce memory footprint for loa

PR kern/38814 ksyms needs locking

- Make ksyms MT safe.
- Fix deadlock from an operation like "modload foo.lkm < /dev/ksyms".
- Fix uninitialized structure members.
- Reduce memory footprint for loaded modules.
- Export ksyms structures for kernel grovellers like savecore.
- Some KNF.

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- Initialize pool subsystem and kmem(9) earlier, when UVM is up enough.
- Remove uao_hashinit() workaround used for anon-objects.
- Replace malloc with kmem.

OK by <yamt>.

Move uidinfo to its own module in kern_uidinfo.c and include in rump.
No functional change to uidinfo.

Rewrite once to use global locks and atomic ops to get rid of the
static simplelock initializer (and simplelock too). The fastpath
is still lockless, so doesn't make a difference in terms of
perform

Rewrite once to use global locks and atomic ops to get rid of the
static simplelock initializer (and simplelock too). The fastpath
is still lockless, so doesn't make a difference in terms of
performance.

Also fixes a hanging bug if the once routine returned an error.
It does not retry after an error occurs, as I can't really imagine
fruitful semantics for that.

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Revert previous change and clarify meaning of RNG

Fix simple typo:
- rnd_init(); /* initialize RNG */
+ rnd_init(); /* initialize RND */

Merge the simonb-wapbl branch. From the original branch commit:

Add Wasabi System's WAPBL (Write Ahead Physical Block Logging)
journaling code. Originally written by Darrin B. Jewell while

Merge the simonb-wapbl branch. From the original branch commit:

Add Wasabi System's WAPBL (Write Ahead Physical Block Logging)
journaling code. Originally written by Darrin B. Jewell while
at Wasabi and updated to -current by Antti Kantee, Andy Doran,
Greg Oster and Simon Burge.

OK'd by core@, releng@.

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merge yamt-pf42 branch.
(import newer pf from OpenBSD 4.2)

ok'ed by peter@. requested by core@

PR kern/38927: processes getting stuck in uvm_map (cv_timedwait), hanging
machine

Assume that a vnode (and associated data structures) costs 2kB in the
worst imaginable case. Don't allow sysctl to s

PR kern/38927: processes getting stuck in uvm_map (cv_timedwait), hanging
machine

Assume that a vnode (and associated data structures) costs 2kB in the
worst imaginable case. Don't allow sysctl to set desiredvnodes to a
value that would use more than 75% of KVA or 75% of physical memory.

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- Put in place module compatibility check against __NetBSD_Version__,
as discussed on tech-kern.

- Remove unused module_jettison().

PR kern/38355 lockf deadlock detection is broken after vmlocking

- Fix it; tested with Sun's libMicro.
- Use pool_cache.
- Use a global lock, so the deadlock detection code is safer.

Replace a couple of tsleep calls with cv_wait.

Get the pre-loaded module code working.

Remove clause 3 and 4 from TNF licenses

Merge proc::p_mutex and proc::p_smutex into a single adaptive mutex, since
we no longer need to guard against access from hardware interrupt handlers.

Additionally, if cloning a process with CLONE_S

Merge proc::p_mutex and proc::p_smutex into a single adaptive mutex, since
we no longer need to guard against access from hardware interrupt handlers.

Additionally, if cloning a process with CLONE_SIGHAND, arrange to have the
child process share the parent's lock so that signal state may be kept in
sync. Partially addresses PR kern/37437.

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Network protocol interrupts can now block on locks, so merge the globals
proclist_mutex and proclist_lock into a single adaptive mutex (proc_lock).
Implications:

- Inspecting process state requires

Network protocol interrupts can now block on locks, so merge the globals
proclist_mutex and proclist_lock into a single adaptive mutex (proc_lock).
Implications:

- Inspecting process state requires thread context, so signals can no longer
be sent from a hardware interrupt handler. Signal activity must be
deferred to a soft interrupt or kthread.

- As the proc state locking is simplified, it's now safe to take exit()
and wait() out from under kernel_lock.

- The system spends less time at IPL_SCHED, and there is less lock activity.

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It's only a typo in a comment, but it reduces the number of diffs in my local
tree :-)