linux-kernel - [tip: objtool/core] sh/cpu: Make sure play

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Message-ID: <167848169104.5837.6829636561739087615.tip-bot2@tip-bot2>
Date:   Fri, 10 Mar 2023 20:54:51 -0000
From:   "tip-bot2 for Josh Poimboeuf" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Josh Poimboeuf <jpoimboe@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: objtool/core] sh/cpu: Make sure play_dead() doesn't return

The following commit has been merged into the objtool/core branch of tip:

Commit-ID:     243971885418fcf772f18019eb3fabadcf0205d1
Gitweb:        https://git.kernel.org/tip/243971885418fcf772f18019eb3fabadcf0205d1
Author:        Josh Poimboeuf <jpoimboe@...nel.org>
AuthorDate:    Mon, 13 Feb 2023 23:05:47 -08:00
Committer:     Josh Poimboeuf <jpoimboe@...nel.org>
CommitterDate: Wed, 08 Mar 2023 08:44:24 -08:00

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.

Link: https://lore.kernel.org/r/d0c3ff5349adfe8fd227acc236ae2c278a05eb4c.1676358308.git.jpoimboe@kernel.org
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 e277021..63866b1 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);