From patchwork Fri Dec 10 13:36:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tiezhu Yang X-Patchwork-Id: 12669615 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 4BDC7C433EF for ; Fri, 10 Dec 2021 13:37:09 +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:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id: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=BEZXrfbHga7KzRgCCcNhjpS2xMGwSJdmW5qtZtj4nXc=; b=36UgqK+//px3A9 VtLkEjBN6BuMyXWY/S1aA19NKlKsi58MikvlK95er+1dIrnCiV4y5/ryg0iYk5gPf2ULmsewPIdDI mp1vK+dct3N4wmSnf4nB4jPxZ7gPWLuuqpzF7fPJ/sYpTA6XrfgCYA/lIMZCIx1jqC5/NEar/hvsL leF/pVhOcIVruIanqW+vgL3qtilqovOtgi6CRj5egOyi1NI/EbvcEzbV53F+ht6/+59WTXZTARL2P Qeiarn7xbqv9I92GzLOPRUZITDuJ2MLWHtyzmYSgXU6rnfCMU2zVjrAXxR4gE6E4Rqlfwpp8tA6LT f55kFkv7LU/0TMfaLYyg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvg57-002193-CD; Fri, 10 Dec 2021 13:37:01 +0000 Received: from mail.loongson.cn ([114.242.206.163] helo=loongson.cn) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mvg4I-0020hw-C5; Fri, 10 Dec 2021 13:36:14 +0000 Received: from linux.localdomain (unknown [113.200.148.30]) by mail.loongson.cn (Coremail) with SMTP id AQAAf9AxusjBV7Nh3OEFAA--.12281S4; Fri, 10 Dec 2021 21:36:03 +0800 (CST) From: Tiezhu Yang To: Dave Young , Baoquan He , Vivek Goyal , Andrew Morton Cc: linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, x86@kernel.org, linux-fsdevel@vger.kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] kdump: crashdump: use copy_to() to simplify the related code Date: Fri, 10 Dec 2021 21:36:01 +0800 Message-Id: <1639143361-17773-3-git-send-email-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1639143361-17773-1-git-send-email-yangtiezhu@loongson.cn> References: <1639143361-17773-1-git-send-email-yangtiezhu@loongson.cn> X-CM-TRANSID: AQAAf9AxusjBV7Nh3OEFAA--.12281S4 X-Coremail-Antispam: 1UD129KBjvJXoW3XrW5CF1rtr1fXr4fJF17Awb_yoW7KF13pr 1vk39ayr4Ig3Z8GasrtrnrWFW0qwn7G3W7J3yDC3WrZwnaqwnFvw1kJas2g3yjqr15KryF yF95Kr4Yy3y8W3DanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPab7Iv0xC_Kw4lb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I2 0VC2zVCF04k26cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI 8067AKxVWUXwA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF 64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0cI8IcV CY1x0267AKxVWxJVW8Jr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIE c7CjxVAFwI0_GcCE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I 8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r4j6F4UMcvjeVCF s4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwACI402YVCY1x02628vn2kIc2xKxwCY02 Avz4vE14v_Xr4l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAq x4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r 43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF 7I0E14v26r4j6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxV WUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjxU yuWlDUUUU X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211210_053610_902393_C8A394E1 X-CRM114-Status: GOOD ( 10.06 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Use copy_to() to simplify the related code about copy_oldmem_page() in arch/*/kernel/crash_dump*.c files. Signed-off-by: Tiezhu Yang --- arch/arm/kernel/crash_dump.c | 10 ++-------- arch/arm64/kernel/crash_dump.c | 10 ++-------- arch/ia64/kernel/crash_dump.c | 10 ++++------ arch/mips/kernel/crash_dump.c | 9 ++------- arch/powerpc/kernel/crash_dump.c | 7 ++----- arch/riscv/kernel/crash_dump.c | 9 ++------- arch/sh/kernel/crash_dump.c | 9 ++------- arch/x86/kernel/crash_dump_32.c | 9 ++------- arch/x86/kernel/crash_dump_64.c | 9 ++------- 9 files changed, 20 insertions(+), 62 deletions(-) diff --git a/arch/arm/kernel/crash_dump.c b/arch/arm/kernel/crash_dump.c index 53cb924..6491f1d 100644 --- a/arch/arm/kernel/crash_dump.c +++ b/arch/arm/kernel/crash_dump.c @@ -40,14 +40,8 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf, if (!vaddr) return -ENOMEM; - if (userbuf) { - if (copy_to_user(buf, vaddr + offset, csize)) { - iounmap(vaddr); - return -EFAULT; - } - } else { - memcpy(buf, vaddr + offset, csize); - } + if (copy_to(buf, vaddr + offset, csize, userbuf)) + csize = -EFAULT; iounmap(vaddr); return csize; diff --git a/arch/arm64/kernel/crash_dump.c b/arch/arm64/kernel/crash_dump.c index 58303a9..496e6a5 100644 --- a/arch/arm64/kernel/crash_dump.c +++ b/arch/arm64/kernel/crash_dump.c @@ -38,14 +38,8 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf, if (!vaddr) return -ENOMEM; - if (userbuf) { - if (copy_to_user((char __user *)buf, vaddr + offset, csize)) { - memunmap(vaddr); - return -EFAULT; - } - } else { - memcpy(buf, vaddr + offset, csize); - } + if (copy_to(buf, vaddr + offset, csize, userbuf)) + csize = -EFAULT; memunmap(vaddr); diff --git a/arch/ia64/kernel/crash_dump.c b/arch/ia64/kernel/crash_dump.c index 0ed3c3d..20f4c4e 100644 --- a/arch/ia64/kernel/crash_dump.c +++ b/arch/ia64/kernel/crash_dump.c @@ -39,13 +39,11 @@ copy_oldmem_page(unsigned long pfn, char *buf, if (!csize) return 0; + vaddr = __va(pfn<