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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 5D230C433ED for ; Mon, 12 Apr 2021 16:17:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2B68861241 for ; Mon, 12 Apr 2021 16:17:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241288AbhDLQRe (ORCPT ); Mon, 12 Apr 2021 12:17:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237798AbhDLQRd (ORCPT ); Mon, 12 Apr 2021 12:17:33 -0400 Received: from ustc.edu.cn (email6.ustc.edu.cn [IPv6:2001:da8:d800::8]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CD937C061574 for ; Mon, 12 Apr 2021 09:17:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mail.ustc.edu.cn; s=dkim; h=Received:Date:From:To:Cc:Subject: Message-ID:In-Reply-To:References:MIME-Version:Content-Type: Content-Transfer-Encoding; bh=HPUQ5hikiB/PpNEHlz4qMgRr8a4Ky8d+Pa s5GCx2Zt4=; b=mivupzkpXptRxp9N1ifz0wtDutpyuLRAKVv6LYt8+CTJcct0O1 ffjGX+j1PUmbwuycphSBYkipj8AdG4+qGnYrfmCnFHsJ5TgevkPSQE+HU8uDpgAL +z1yVfr5AUnyS3oFHSxme+5oMr2VBzvg0VaEvL/UDjnx3pIctEpcMKnaU= Received: from xhacker (unknown [101.86.20.15]) by newmailweb.ustc.edu.cn (Coremail) with SMTP id LkAmygDn70t9cnRgbDjLAA--.59972S2; Tue, 13 Apr 2021 00:17:02 +0800 (CST) Date: Tue, 13 Apr 2021 00:11:59 +0800 From: Jisheng Zhang To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , " =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?=" , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Luke Nelson , Xi Wang , Anup Patel Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 01/10] riscv: mm: Remove setup_zero_page() Message-ID: <20210413001159.341a95d6@xhacker> In-Reply-To: <20210413001110.7209bae6@xhacker> References: <20210413001110.7209bae6@xhacker> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-CM-TRANSID: LkAmygDn70t9cnRgbDjLAA--.59972S2 X-Coremail-Antispam: 1UD129KBjvdXoW7GFyDCw48tF4fWF4rKrW5trb_yoWDGFb_Wr yvvr4fWFy5Wa18uanrXwsxJr1UAayvyF4DXr1Iy34ayr13Wan8A3s5KFW3Xw1kGr4SvFZ2 gFW3JFZxtr12kjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb48YjsxI4VWDJwAYFVCjjxCrM7AC8VAFwI0_Xr0_Wr1l1xkIjI8I 6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM2 8CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0 cI8IcVCY1x0267AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_Gr1j6F4UJwA2z4x0Y4 vEx4A2jsIEc7CjxVAFwI0_Gr1j6F4UJwAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40E FcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr 0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcVAKI48JM4IIrI8v6xkF7I0E8cxan2IY 04v7MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI 0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVW8ZVWrXwCIc40Y 0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxV W8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Gr0_Zr1lIxAIcVC2z280aVAFwI0_Jr0_Gr1l IxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7IU81GQDUUUU U== X-CM-SenderInfo: xmv2xttqjtqzxdloh3xvwfhvlgxou0/ Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jisheng Zhang The empty_zero_page sits at .bss..page_aligned section, so will be cleared to zero during clearing bss, we don't need to clear it again. Signed-off-by: Jisheng Zhang --- arch/riscv/mm/init.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 7f5036fbee8c..dbeaa4144e4d 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -57,11 +57,6 @@ static void __init zone_sizes_init(void) free_area_init(max_zone_pfns); } -static void setup_zero_page(void) -{ - memset((void *)empty_zero_page, 0, PAGE_SIZE); -} - #if defined(CONFIG_MMU) && defined(CONFIG_DEBUG_VM) static inline void print_mlk(char *name, unsigned long b, unsigned long t) { @@ -589,7 +584,6 @@ void mark_rodata_ro(void) void __init paging_init(void) { setup_vm_final(); - setup_zero_page(); } void __init misc_mem_init(void) -- 2.31.0