linux-kernel - [PATCH v2.1 03/24] arm/cpu: Add unreachable() to arch_cpu_idle

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Message-ID: <20230216183851.s5bnvniomq44rytu@treble>
Date:   Thu, 16 Feb 2023 10:38:51 -0800
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     "Russell King (Oracle)" <linux@...linux.org.uk>
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Subject: [PATCH v2.1 03/24] arm/cpu: Add unreachable() to arch_cpu_idle_dead()

arch_cpu_idle_dead() doesn't return.  Make that visible to the compiler
with an unreachable() code annotation.

Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
 arch/arm/kernel/smp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 0b8c25763adc..441ea5cff390 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -382,6 +382,8 @@ void arch_cpu_idle_dead(void)
 		: "r" (task_stack_page(current) + THREAD_SIZE - 8),
 		  "r" (current)
 		: "r0");
+
+	unreachable();
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
-- 
2.39.1