FAILED: patch "[PATCH] watchdog/core: Add missing prototypes for weak functions" failed to apply to 4.9-stable tree

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From: Mathieu Malaterre <[email protected]>
Date: Wed, 6 Jun 2018 21:42:32 +0200
Subject: [PATCH] watchdog/core: Add missing prototypes for weak functions
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The split out of the hard lockup detector exposed two new weak functions, but no prototypes for them, which triggers the build warning:

kernel/watchdog.c:109:12: warning: no previous prototype for ‘watchdog_nmi_enable’ [-Wmissing-prototypes] kernel/watchdog.c:115:13: warning: no previous prototype for ‘watchdog_nmi_disable’ [-Wmissing-prototypes]

Add the prototypes.

index 08f9247e9827..9003e29cde46 100644
@@ -119,6 +119,8 @@ static inline int hardlockup_detector_perf_init(void) { return 0; }
 void watchdog_nmi_stop(void);
 void watchdog_nmi_start(void);
 int watchdog_nmi_probe(void);
+int watchdog_nmi_enable(unsigned int cpu);
+void watchdog_nmi_disable(unsigned int cpu);
 
 /**
  * touch_nmi_watchdog - restart NMI watchdog timeout.