CVS commit: src/sys/kern

[David Young <dyoung%netbsd.org@localhost>]

Module Name:    src
Committed By:   dyoung
Date:           Fri Apr 30 21:17:22 UTC 2010

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

Log Message:
IPL_VM is the highest interrupt priority where alldevs is read/written,
and acquiring alldevs_mtx already blocks those interrupts, so delete the
splhigh()/splx() in config_alldevs_lock()/_unlock().

Release alldevs_mtx while freeing memory with kmem_free(9); according to
new documentation, kmem_free(9) can sleep! :-) Thanks to rmind@ for the
tip.

Next step: use finer-grained locking, probably by adding a mutex to
    cfdriver_t.

And after that: make sure that all threads of execution are out of the
    device_t and/or softc before releasing their memory.


To generate a diff of this commit:
cvs rdiff -u -r1.205 -r1.206 src/sys/kern/subr_autoconf.c

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