linux-kernel - [PATCH] watchdog: output this_cpu when printing hard LOCKUP

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Message-Id: <20241210095238.63444-1-cuiyunhui@bytedance.com>
Date: Tue, 10 Dec 2024 17:52:38 +0800
From: Yunhui Cui <cuiyunhui@...edance.com>
To: akpm@...ux-foundation.org,
	dianders@...omium.org,
	song@...nel.org,
	john.ogness@...utronix.de,
	liusong@...ux.alibaba.com,
	joel.granados@...nel.org,
	yaoma@...ux.alibaba.com,
	linux@...ssschuh.net,
	linux-kernel@...r.kernel.org
Cc: Yunhui Cui <cuiyunhui@...edance.com>
Subject: [PATCH] watchdog: output this_cpu when printing hard LOCKUP

When printing "Watchdog detected hard LOCKUP on cpu", also output
the detecting CPU. It's more intuitive.

Signed-off-by: Yunhui Cui <cuiyunhui@...edance.com>
---
 kernel/watchdog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 262691ba62b7a..718e8c6fbe277 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -190,7 +190,7 @@ void watchdog_hardlockup_check(unsigned int cpu, struct pt_regs *regs)
 		 * with printk_cpu_sync_get_irqsave() that we can still at least
 		 * get the message about the lockup out.
 		 */
-		pr_emerg("Watchdog detected hard LOCKUP on cpu %d\n", cpu);
+		pr_emerg("CPU%u: Watchdog detected hard LOCKUP on cpu %u\n", this_cpu, cpu);
 		printk_cpu_sync_get_irqsave(flags);
 
 		print_modules();
-- 
2.39.2