From 4b88865d8bf02ec78ab2ea54b403524d9b239cc6 Mon Sep 17 00:00:00 2001
From: Nicholas Piggin <npiggin@gmail.com>
Date: Tue, 25 Jun 2024 21:42:44 +1000
Subject: [PATCH] workqueue: wq_watchdog_touch is always called with valid CPU

[ Upstream commit 18e24deb1cc92f2068ce7434a94233741fbd7771 ]

Warn in the case it is called with cpu == -1. This does not appear
to happen anywhere.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Stable-dep-of: 98f887f820c9 ("workqueue: Improve scalability of workqueue watchdog touch")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 kernel/workqueue.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index c970eec25c5a..f26b0511b023 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -7588,6 +7588,8 @@ notrace void wq_watchdog_touch(int cpu)
 {
 	if (cpu >= 0)
 		per_cpu(wq_watchdog_touched_cpu, cpu) = jiffies;
+	else
+		WARN_ONCE(1, "%s should be called with valid CPU", __func__);
 
 	wq_watchdog_touched = jiffies;
 }