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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C177EC43381 for ; Tue, 26 Feb 2019 17:37:47 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 3EE9E217F9 for ; Tue, 26 Feb 2019 17:37:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=c-s.fr header.i=@c-s.fr header.b="mRdRp2Md" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3EE9E217F9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4485cT2cp9zDqNk for ; Wed, 27 Feb 2019 04:37:45 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=c-s.fr (client-ip=93.17.236.30; helo=pegase1.c-s.fr; envelope-from=christophe.leroy@c-s.fr; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=c-s.fr Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=c-s.fr header.i=@c-s.fr header.b="mRdRp2Md"; dkim-atps=neutral Received: from pegase1.c-s.fr (pegase1.c-s.fr [93.17.236.30]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4485HL6DtQzDqLl for ; Wed, 27 Feb 2019 04:22:54 +1100 (AEDT) Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 4485H91FHmz9vJLg; Tue, 26 Feb 2019 18:22:45 +0100 (CET) Authentication-Results: localhost; dkim=pass reason="1024-bit key; insecure key" header.d=c-s.fr header.i=@c-s.fr header.b=mRdRp2Md; dkim-adsp=pass; dkim-atps=neutral X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id wa7NW71wC-7A; Tue, 26 Feb 2019 18:22:45 +0100 (CET) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 4485H904tZz9vJLY; Tue, 26 Feb 2019 18:22:45 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=c-s.fr; s=mail; t=1551201765; bh=FcoH0MWZdtOBuC7W/yk0A9+bmiNTMQTCcIimrSkyq24=; h=In-Reply-To:References:From:Subject:To:Cc:Date:From; b=mRdRp2MdqDKy+WcWi0yf/hvgeunwSNaUNZRmJXDfhiptnSXfjnhPQlxjOufdkz95F vXE+KzumvvSQSWGXsC65s/KS4xrg4UgiqBsMiU3Uk9SMp8doRCpGTtj1KdnBDZPkhy RDiHK8KyftY40FwP1do3dfd6tUfQxPSR2z3WfXA4= Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id A47F08B97A; Tue, 26 Feb 2019 18:22:46 +0100 (CET) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id IgOg4aQV0MSY; Tue, 26 Feb 2019 18:22:46 +0100 (CET) Received: from po16846vm.idsi0.si.c-s.fr (unknown [192.168.4.90]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 741138B96A; Tue, 26 Feb 2019 18:22:46 +0100 (CET) Received: by po16846vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 52C196F7B5; Tue, 26 Feb 2019 17:22:46 +0000 (UTC) Message-Id: In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v8 05/11] powerpc/32: use memset() instead of memset_io() to zero BSS To: Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Nicholas Piggin , Aneesh Kumar K.V , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Daniel Axtens Date: Tue, 26 Feb 2019 17:22:46 +0000 (UTC) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Since commit 400c47d81ca38 ("powerpc32: memset: only use dcbz once cache is enabled"), memset() can be used before activation of the cache, so no need to use memset_io() for zeroing the BSS. Acked-by: Dmitry Vyukov Signed-off-by: Christophe Leroy --- arch/powerpc/kernel/early_32.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/early_32.c b/arch/powerpc/kernel/early_32.c index cf3cdd81dc47..3482118ffe76 100644 --- a/arch/powerpc/kernel/early_32.c +++ b/arch/powerpc/kernel/early_32.c @@ -21,8 +21,8 @@ notrace unsigned long __init early_init(unsigned long dt_ptr) { unsigned long offset = reloc_offset(); - /* First zero the BSS -- use memset_io, some platforms don't have caches on yet */ - memset_io((void __iomem *)PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start); + /* First zero the BSS */ + memset(PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start); /* * Identify the CPU type and fix up code sections -- 2.13.3