linux-kernel - [PATCH 05/22] csky/cpu: Make sure arch_cpu_idle

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <f860f3a1c1a53c437a99abc53e8f1a798aef6881.1675461757.git.jpoimboe@kernel.org>
Date:   Fri,  3 Feb 2023 14:05:14 -0800
From:   Josh Poimboeuf <jpoimboe@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     jgross@...e.com, richard.henderson@...aro.org,
        ink@...assic.park.msu.ru, mattst88@...il.com,
        linux-alpha@...r.kernel.org, linux@...linux.org.uk,
        linux-arm-kernel@...ts.infradead.org, catalin.marinas@....com,
        will@...nel.org, guoren@...nel.org, linux-csky@...r.kernel.org,
        linux-ia64@...r.kernel.org, chenhuacai@...nel.org,
        kernel@...0n.name, loongarch@...ts.linux.dev, f.fainelli@...il.com,
        bcm-kernel-feedback-list@...adcom.com, tsbogend@...ha.franken.de,
        linux-mips@...r.kernel.org, jiaxun.yang@...goat.com,
        mpe@...erman.id.au, npiggin@...il.com, christophe.leroy@...roup.eu,
        linuxppc-dev@...ts.ozlabs.org, ysato@...rs.sourceforge.jp,
        dalias@...c.org, linux-sh@...r.kernel.org, davem@...emloft.net,
        sparclinux@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
        hpa@...or.com, chris@...kel.net, jcmvbkbc@...il.com,
        linux-xtensa@...ux-xtensa.org, peterz@...radead.org,
        juri.lelli@...hat.com, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, bristot@...hat.com, vschneid@...hat.com,
        paulmck@...nel.org
Subject: [PATCH 05/22] csky/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/csky/kernel/smp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/csky/kernel/smp.c b/arch/csky/kernel/smp.c
index b45d1073307f..0ec20efaf5fd 100644
--- a/arch/csky/kernel/smp.c
+++ b/arch/csky/kernel/smp.c
@@ -317,5 +317,7 @@ void arch_cpu_idle_dead(void)
 		"jmpi	csky_start_secondary"
 		:
 		: "r" (secondary_stack));
+
+	BUG();
 }
 #endif
-- 
2.39.0