From patchwork Tue Feb 14 07:05:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Poimboeuf X-Patchwork-Id: 13139494 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E4625C64EC7 for ; Tue, 14 Feb 2023 07:08:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=PVCX4pGjEeRSk2ygak8Vlkem/4XVVF/9RKeDhC4Pj0g=; b=DFTUJCtn10EuOE dP3xDjIQUY0ZP7oyicKpt88vEj3VQO48T5rLxUPBIL/t0d5G6lfopLzIW20HHf99CXL15ZtTdGv2I mrT+szq+fsqy7pQwiaGvhoZR2Sf6guh5QrcqZdnpgv+7xyVEXQnKeoVJB9RKrr9qxXCaLxOoUpba5 gsZw/EC8RhnnNk+2cDvE/LY+IbOepabHzs/ZvVLhR1/zJa6AxN+etJxO+89BZjlHDf2lm3ouf6m3q FVRUl5+rWfnrlRyvpnJgSEI5J+M0kFf08AjwZpr01LhybkOCpWWEiWHBkamm5dh3qqS25I2KI+Yjt 4hHniB/Vbc/nwvNO0Xag==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pRpPE-0007xN-05; Tue, 14 Feb 2023 07:07:12 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pRpOw-0007mj-Pd for linux-arm-kernel@lists.infradead.org; Tue, 14 Feb 2023 07:06:56 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 649A9B81BFF; Tue, 14 Feb 2023 07:06:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7744CC433AE; Tue, 14 Feb 2023 07:06:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1676358412; bh=Ya58HiCcymNeXiDsDrSrB3MVa42ANSTnVDrYM/I8DGE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o1g46MnmwcBx8T5+mpqxpWg9RNiPGwxWh7u50+UbvVV/HCNE/CzztVflEM53qxglv YYK/YrY0Q9V6xIHds9bSBH9HN0lqUKa6Z1xe3cfCjxpSNsspagp2pNbL0WMNKEQ0Rx pzr+HaAh9N3K2/cV0XtAVxzNNCB75oEBpHNITqIRR27J3mfkFgz/r562+bVXahSIST IY0Pnmrhw/r9K8+6kstkVaj4pLQJnS5iSYM8p9up4WRV2EcZ3VkSKGVUgn+3GYoIew SCyrNFtXGmtYxVMosYI0z60anWodjY2gKyCCb0H5AEcAnHnT5mlvQpZIVvTrKYjllD UOkJrRuEY33Fg== From: Josh Poimboeuf To: linux-kernel@vger.kernel.org Cc: jgross@suse.com, richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, linux-alpha@vger.kernel.org, linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, linux-csky@vger.kernel.org, linux-ia64@vger.kernel.org, chenhuacai@kernel.org, kernel@xen0n.name, loongarch@lists.linux.dev, f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, tsbogend@alpha.franken.de, linux-mips@vger.kernel.org, jiaxun.yang@flygoat.com, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, linuxppc-dev@lists.ozlabs.org, ysato@users.sourceforge.jp, dalias@libc.org, linux-sh@vger.kernel.org, davem@davemloft.net, sparclinux@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, chris@zankel.net, jcmvbkbc@gmail.com, linux-xtensa@linux-xtensa.org, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, paulmck@kernel.org Subject: [PATCH v2 02/24] alpha/cpu: Make sure arch_cpu_idle_dead() doesn't return Date: Mon, 13 Feb 2023 23:05:36 -0800 Message-Id: <19ffef09a175fecb783abcd44d6bcfeade2857eb.1676358308.git.jpoimboe@kernel.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230213_230655_028633_E8078DEB X-CRM114-Status: GOOD ( 10.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 --- 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 d1f2e8b6b107..d0ff06eda8fa 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 */