svn commit: r359759 - head/sys/kern

[Kirk McKusick]

Author: mckusick
Date: Thu Apr  9 23:42:13 2020
New Revision: 359759
URL: https://svnweb.freebsd.org/changeset/base/359759

Log:
  When running with a kernel compiled with DEBUG_LOCKS, before
  panic'ing for recusing on a non-recursive lock, print out the
  kernel stack where the lock was originally acquired.

Modified:
  head/sys/kern/kern_lock.c

Modified: head/sys/kern/kern_lock.c
==============================================================================
--- head/sys/kern/kern_lock.c	Thu Apr  9 23:22:35 2020	(r359758)
+++ head/sys/kern/kern_lock.c	Thu Apr  9 23:42:13 2020	(r359759)
@@ -732,6 +732,7 @@ lockmgr_xlock_hard(struct lock *lk, u_int flags, struc
 				class = LOCK_CLASS(ilk);
 				class->lc_unlock(ilk);
 			}
+			STACK_PRINT(lk);
 			panic("%s: recursing on non recursive lockmgr %p "
 			    "@ %s:%d\n", __func__, lk, file, line);
 		}