Author: adrian Date: Mon Jan 26 04:04:57 2015 New Revision: 277723 URL: https://svnweb.freebsd.org/changeset/base/277723
Log: Call WITNESS_WARN() in callout_drain() to check whether any locks are being held before sleeping. This has bitten me (in ath(4)) once before and I'd like to see this not bite anyone else. Differential Revision: D1638 Reviewed by: jhb, hselasky MFC after: 1 week Modified: head/sys/kern/kern_timeout.c Modified: head/sys/kern/kern_timeout.c ============================================================================== --- head/sys/kern/kern_timeout.c Mon Jan 26 03:26:37 2015 (r277722) +++ head/sys/kern/kern_timeout.c Mon Jan 26 04:04:57 2015 (r277723) @@ -1096,6 +1096,10 @@ _callout_stop_safe(struct callout *c, in struct lock_class *class; int direct, sq_locked, use_lock; + if (safe) + WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, c->c_lock, + "calling %s", __func__); + /* * Some old subsystems don't hold Giant while running a callout_stop(), * so just discard this check for the moment. _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"