linux-kernel - [PATCH] nmi_backtrace: fix trigger_allbutcpu_cpu

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Message-Id: <20230807071109.3386799-1-arnd@kernel.org>
Date:   Mon,  7 Aug 2023 09:10:51 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Douglas Anderson <dianders@...omium.org>,
        Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Petr Mladek <pmladek@...e.com>,
        Tom Rix <trix@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] nmi_backtrace: fix trigger_allbutcpu_cpu_backtrace() stub definition

From: Arnd Bergmann <arnd@...db.de>

The prototype for the extern declaration was changed, but the one for
the empty stub is now missing an unused argument:

kernel/watchdog.c: In function 'watchdog_timer_fn':
kernel/watchdog.c:521:4: error: too many arguments to function 'trigger_allbutcpu_cpu_backtrace'
  521 |    trigger_allbutcpu_cpu_backtrace(smp_processor_id());
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from kernel/watchdog.c:17:
include/linux/nmi.h:193:20: note: declared here
  193 | static inline bool trigger_allbutcpu_cpu_backtrace(void)
      |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: 0ca1d340a231e ("nmi_backtrace: allow excluding an arbitrary CPU")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 include/linux/nmi.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index 7cf7801856a1b..e92e378df000f 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -190,7 +190,7 @@ static inline bool trigger_all_cpu_backtrace(void)
 {
 	return false;
 }
-static inline bool trigger_allbutcpu_cpu_backtrace(void)
+static inline bool trigger_allbutcpu_cpu_backtrace(int exclude_cpu)
 {
 	return false;
 }
-- 
2.39.2