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Subject: [Bug 213903] Kernel crashes from turnstile_broadcast
 (/usr/src/sys/kern/subr_turnstile.c:837)
Date: Fri, 24 Mar 2017 12:13:14 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D213903

--- Comment #21 from Franco Fichtner <franco@opnsense.org> ---
This was only supposed to print further debug output, but something in here=
 is
probably responsible for fixing it as it touches the same lines as r301157
that's been known to cause the panic in the first place...

-       else if ((rw)->rw_lock !=3D _tid || !_rw_write_unlock((rw), _tid))\
-               _rw_wunlock_hard((rw), _tid, (file), (line));           \
+       else {                                                          \
+               _v =3D (rw)->rw_lock;                                     \
+               if (_v !=3D _tid || !_rw_write_unlock_fetch((rw), &_v))   \
+                       _rw_wunlock_hard((rw), _v, _tid, (file), (line));\
+       }

--=20
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