linux-kernel - [PATCH] tick/broadcast: Fix warning about undefined tick_broadcast_oneshot

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Date:   Fri, 29 Mar 2019 12:05:08 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Valentin Schneider <valentin.schneider@....com>,
        Frederic Weisbecker <fweisbec@...il.com>, x86@...nel.org
Subject: [PATCH] tick/broadcast: Fix warning about undefined tick_broadcast_oneshot_offline()

From: Borislav Petkov <bp@...e.de>

Randconfig builds with

  CONFIG_TICK_ONESHOT=y
  CONFIG_HOTPLUG_CPU=n

trigger

  kernel/time/tick-broadcast.c:39:13: warning: ‘tick_broadcast_oneshot_offline’ \
	  declared ‘static’ but never defined [-Wunused-function]

due to that function's definition missing.

Move the CONFIG_HOTPLUG_CPU ifdeffery around its declaration too.

Fixes: 1b72d4323798 ("tick: Remove outgoing CPU from broadcast masks")
Signed-off-by: Borislav Petkov <bp@...e.de>
Acked-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Valentin Schneider <valentin.schneider@....com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: x86@...nel.org
---
 kernel/time/tick-broadcast.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 0283523de045..7541cbca695e 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -36,12 +36,16 @@ static __cacheline_aligned_in_smp DEFINE_RAW_SPINLOCK(tick_broadcast_lock);
 static void tick_broadcast_setup_oneshot(struct clock_event_device *bc);
 static void tick_broadcast_clear_oneshot(int cpu);
 static void tick_resume_broadcast_oneshot(struct clock_event_device *bc);
+# ifdef CONFIG_HOTPLUG_CPU
 static void tick_broadcast_oneshot_offline(unsigned int cpu);
+# endif
 #else
 static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) { BUG(); }
 static inline void tick_broadcast_clear_oneshot(int cpu) { }
 static inline void tick_resume_broadcast_oneshot(struct clock_event_device *bc) { }
+# ifdef CONFIG_HOTPLUG_CPU
 static inline void tick_broadcast_oneshot_offline(unsigned int cpu) { }
+# endif
 #endif
 
 /*
-- 
2.21.0