linux-kernel - [PATCH 02/22] alpha/cpu: Make sure arch_cpu_idle

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Message-Id: <543dffab94755ae8460b22e273213cbb9a72a173.1675461757.git.jpoimboe@kernel.org>
Date:   Fri,  3 Feb 2023 14:05:11 -0800
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     linux-kernel@...r.kernel.org
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        ink@...assic.park.msu.ru, mattst88@...il.com,
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Subject: [PATCH 02/22] alpha/cpu: Make sure arch_cpu_idle_dead() doesn't return

arch_cpu_idle_dead() doesn't return.  Make that more explicit with a
BUG().

BUG() is preferable to unreachable() because BUG() is a more explicit
failure mode and avoids undefined behavior like falling off the edge of
the function into whatever code happens to be next.

Signed-off-by: Josh Poimboeuf <jpoimboe@...nel.org>
---
 arch/alpha/kernel/process.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 4813172547b5..94938f856545 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -63,6 +63,7 @@ void arch_cpu_idle(void)
 void arch_cpu_idle_dead(void)
 {
 	wtint(INT_MAX);
+	BUG();
 }
 #endif /* ALPHA_WTINT */
 
-- 
2.39.0