CVS commit: src/sys/dev/pad

["Nathanial Sloss" <nat%netbsd.org@localhost>]

Module Name:    src
Committed By:   nat
Date:           Tue Jan  9 04:23:59 UTC 2018

Modified Files:
        src/sys/dev/pad: pad.c

Log Message:
Fix pad on systems with many cores/cpus:

        * Introduce a lock to serialize attach/detach of pad devices.
        * Forcefully detach children of pad on close.
        * Be more carefull in pad_open with regards to config_detach only
          if new instances of the pad device are created and fail to open.

Addresses PR kern/52889.

These changes were developed with and tested by pgoyette@.


To generate a diff of this commit:
cvs rdiff -u -r1.49 -r1.50 src/sys/dev/pad/pad.c

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