1) Lock ordering in cprng_strong_destroy had us take a spin mutex then
an adaptive mutex. Can't do that. Reordering this requires changing
cprng_strong_reseed to tryenter the cprng's own mutex and skip the
reseed on failure, or we could deadlock.
2) Can't free memory with a valid mutex in it.
may fail leading to a panic in bread().
Replace bread() with getblk() / VOP_STRATEGY() and return
an error if getblk() fails.
Fixes PR#46282: 6.0_BETA crash: msdosfs_bmap -> pcbmap -> bread -> bio_doread
This is an interim solution for easy pullup. The final solution
is be to change bread() to not return a buffer on error. As
we have to change all callers of bread() this will not qualify
for a pullup.
- change midi_attach() to omit the 'parent' arg (there are
only two callers of this and it is not used)
- change midisyn_attach() to midisyn_init(), so not needing a midi_softc,
and fix the midi_pcppi driver to set hw_if and hw_hdl directly in
its midi_softc before calling midi_attach()
- add a device_t to opl_softc structure, change opl drivers to store
the device 'self' in opl_softc and fix opl_attach() to use this
opl_softc->dev field directly rather than a field in an otherwise
unused midi_softc
- remove unnecessary midi_softc from opl and cms drivers (child device
provides that)
reviewed by mrg
lookup, create, mknod, mkdir, symlink, getattr and setattr messages
have been extended so that attributes and their TTL can be provided
by the filesytem. lookup, create, mknod, mkdir, and symlink messages
are also extended so that the filesystem can provide name TTL.
- always provide a vmspace for the new proc, initially borrowing from proc0
(this part fixes PR 46286)
- increase parallelism between parent and child if arguments allow this,
avoiding a potential deadlock on exec_lock
- add a new flag for userland to request old (lockstepped) behaviour for
better error reporting
- adapt test cases to the previous two and add a new variant to test the
diagnostics flag
- fix a few memory (and lock) leaks
- provide netbsd32 compat
