CVS commit: src/external/cddl/osnet/dev/dtrace

["Paul Goyette" <pgoyette%netbsd.org@localhost>]

Module Name:    src
Committed By:   pgoyette
Date:           Sat Nov 28 22:41:36 UTC 2015

Modified Files:
        src/external/cddl/osnet/dev/dtrace: dtrace_modevent.c

Log Message:
When loading the module, if devsw_attach() fails, call dtrace_unload()
to undo the effects of dtrace_load().  And if dtrace_unload() fails,
panic (since we can't get the system back to its earlier stable state).

When unloading the module, call devsw_detach() first, to lock out any
new access.  Then call dtrace_unload().  If dgtrace_unload() fails,
reattach the devsw, and if that fails, panic.

Implements fixes described in PR kern/43032


To generate a diff of this commit:
cvs rdiff -u -r1.4 -r1.5 src/external/cddl/osnet/dev/dtrace/dtrace_modevent.c

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