linux-kernel - [PATCH 13/22] sh/cpu: Make sure play

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Message-Id: <a984bc4e16d6074f69c12483feec2ddb1721b325.1675461757.git.jpoimboe@kernel.org>
Date:   Fri,  3 Feb 2023 14:05:22 -0800
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     linux-kernel@...r.kernel.org
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Subject: [PATCH 13/22] sh/cpu: Make sure play_dead() doesn't return

play_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/sh/include/asm/smp-ops.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/sh/include/asm/smp-ops.h b/arch/sh/include/asm/smp-ops.h
index e27702130eb6..63866b1595a0 100644
--- a/arch/sh/include/asm/smp-ops.h
+++ b/arch/sh/include/asm/smp-ops.h
@@ -27,6 +27,7 @@ static inline void plat_smp_setup(void)
 static inline void play_dead(void)
 {
 	mp_ops->play_dead();
+	BUG();
 }
 
 extern void register_smp_ops(struct plat_smp_ops *ops);
-- 
2.39.0