From aea9dba46b81abc5c0fd4c42d3ac762d3bc1de37 Mon Sep 17 00:00:00 2001
From: Mark Johnston <markj@FreeBSD.org>
Date: Sat, 10 Aug 2024 15:42:35 +0000
Subject: [PATCH] turnstile: Mention the lock name when panicking due to a
 sleeping thread

This will hopefully make it a bit easier to track down the cause of such
panics.

MFC after:	2 weeks
---
 sys/kern/subr_turnstile.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/kern/subr_turnstile.c b/sys/kern/subr_turnstile.c
index 0a20f3163e30..544dd9f52e9c 100644
--- a/sys/kern/subr_turnstile.c
+++ b/sys/kern/subr_turnstile.c
@@ -246,7 +246,8 @@ propagate_priority(struct thread *td)
 		"Sleeping thread (tid %d, pid %d) owns a non-sleepable lock\n",
 			    td->td_tid, td->td_proc->p_pid);
 			kdb_backtrace_thread(td);
-			panic("sleeping thread");
+			panic("sleeping thread holds %s",
+			    ts->ts_lockobj->lo_name);
 		}
 
 		/*