CVS commit: src/tests/rump/kernspace

["Ryota Ozaki" <ozaki-r%netbsd.org@localhost>]

Module Name:    src
Committed By:   ozaki-r
Date:           Thu Dec 28 04:38:02 UTC 2017

Modified Files:
        src/tests/rump/kernspace: workqueue.c

Log Message:
Fix a race condition on taking the mutex

The workqueue worker can take the mutex before the tester tries to take it after
calling workqueue_enqueue. If it happens, the worker calls cv_broadcast before
the tester calls cv_timedwait and the tester will wait until the cv timed out

Take the mutex before calling workqueue_enqueue so that the tester surely calls
cv_timedwait before the worker calls cv_broadcast.

The fix stabilizes the test, t_workqueue/workqueue1.


To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/tests/rump/kernspace/workqueue.c

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