CVS commit: src/sys

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Sat Jun 12 12:13:51 UTC 2021

Modified Files:
        src/sys/kern: subr_autoconf.c
        src/sys/sys: device.h

Log Message:
autoconf(9): Prevent concurrent attach/detach and detach/detach.

- Use config_pending_incr/decr around attach.  No need for separate
  flag indicating device is still attaching.  (dv_flags locking is also
  incoherent.)

- Any config_pending now blocks config_detach.

- New dv_detaching exclusive lock for config_detach.


To generate a diff of this commit:
cvs rdiff -u -r1.282 -r1.283 src/sys/kern/subr_autoconf.c
cvs rdiff -u -r1.170 -r1.171 src/sys/sys/device.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.