From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DAF46C5AD4C for ; Wed, 15 Nov 2023 19:47:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235269AbjKOTrS (ORCPT ); Wed, 15 Nov 2023 14:47:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235263AbjKOTrR (ORCPT ); Wed, 15 Nov 2023 14:47:17 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 70857C2 for ; Wed, 15 Nov 2023 11:47:14 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 08B97C433C9; Wed, 15 Nov 2023 19:47:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700077634; bh=u1ReexMzx/3dinQ7MmCRSyTjel6XNkL12RsEUemYVvo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NPvjQkM8Q/N6vAxEfyxsCdMQT8XqRBePEzhvyS5HD1K+NcrA0V7qqrFLxutkR+xNL hKwcBIfRFIkuNq6VkbSIENueSoim+z7KUawfcP4078BtEdVdGOf6Vq3kgM2Sceg9eL YHK6jAbMaICbAZzR8jOSb1uUHkBEtjIczLe3Ci/Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Geert Uytterhoeven , John Paul Adrian Glaubitz , Sasha Levin Subject: [PATCH 6.6 392/603] sh: bios: Revive earlyprintk support Date: Wed, 15 Nov 2023 14:15:37 -0500 Message-ID: <20231115191640.265997793@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115191613.097702445@linuxfoundation.org> References: <20231115191613.097702445@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Geert Uytterhoeven [ Upstream commit 553f7ac78fbb41b2c93ab9b9d78e42274d27daa9 ] The SuperH BIOS earlyprintk code is protected by CONFIG_EARLY_PRINTK. However, when this protection was added, it was missed that SuperH no longer defines an EARLY_PRINTK config symbol since commit e76fe57447e88916 ("sh: Remove old early serial console code V2"), so BIOS earlyprintk can no longer be used. Fix this by reviving the EARLY_PRINTK config symbol. Fixes: d0380e6c3c0f6edb ("early_printk: consolidate random copies of identical code") Signed-off-by: Geert Uytterhoeven Reviewed-by: John Paul Adrian Glaubitz Link: https://lore.kernel.org/r/c40972dfec3dcc6719808d5df388857360262878.1697708489.git.geert+renesas@glider.be Signed-off-by: John Paul Adrian Glaubitz Signed-off-by: Sasha Levin --- arch/sh/Kconfig.debug | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug index c449e7c1b20ff..8bcd6c1431a95 100644 --- a/arch/sh/Kconfig.debug +++ b/arch/sh/Kconfig.debug @@ -22,6 +22,17 @@ config STACK_DEBUG every function call and will therefore incur a major performance hit. Most users should say N. +config EARLY_PRINTK + bool "Early printk" + depends on SH_STANDARD_BIOS + help + Say Y here to redirect kernel printk messages to the serial port + used by the SH-IPL bootloader, starting very early in the boot + process and ending when the kernel's serial console is initialised. + This option is only useful while porting the kernel to a new machine, + when the kernel may crash or hang before the serial console is + initialised. If unsure, say N. + config 4KSTACKS bool "Use 4Kb for kernel stacks instead of 8Kb" depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB -- 2.42.0