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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 13EBFC3A59E for ; Wed, 21 Aug 2019 18:33:32 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id D7F252339E for ; Wed, 21 Aug 2019 18:33:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="YMrZRl2F"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=soleen.com header.i=@soleen.com header.b="ILjJA4n/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D7F252339E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=soleen.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; 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:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=op/hmlaWaQjBVvewjI+y+07OxREwfYctf6shd6h5jtQ=; b=YMrZRl2Feh6Sdg GDRLLdO771ZxfJZzi+siD2QYCVwYXtAdMontZaSvMqPlFo0XszgzaoFJhug0KX8HfFeSZcX3+4EaN dFmJx6yfw3+jpNABKA63fntdlggtZOiPye+EhVdjz5uLFH0FHvUsd2GErkyPKF4tZUxWZNfcH0axQ ZcinmlgHhcLplKAlANGFMCwkj3R3iOp3O/iFQLNyFaAFjH/HaewgGdq7MaLlNy166QyxBBEC4R3T7 uA5TNo7cQxFGXzZRAGxQLIxhNfDd/YJdaulwMfPnaBSrqabXShiE5MpzjEK9laJsjT+FRkToyJ66K F4t9ZO8WOAMyxrnNeFGA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i0VQI-0005RT-Jk; Wed, 21 Aug 2019 18:33:30 +0000 Received: from mail-qk1-x743.google.com ([2607:f8b0:4864:20::743]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i0VP2-00040I-J4 for linux-arm-kernel@lists.infradead.org; Wed, 21 Aug 2019 18:32:14 +0000 Received: by mail-qk1-x743.google.com with SMTP id d79so2695435qke.11 for ; Wed, 21 Aug 2019 11:32:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=soleen.com; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=bQvsgscqpy4gJx0RSAZHmPdNixt0ATCDS0WU9XTwyb8=; b=ILjJA4n/giE8JmPiexv7Bw1nwvbRl2Z+YSLoE4FuqVk0Cy9Y8l0Z/Oi043el4txkPI biHES+QyYLZFcNUoZPuckwwgZ/ZXoRyQ8rxMSMLPx468ECFak95S7bHRA5hE7sgYwLo1 ERLOIgzIGS0X8aQ1hin4TNUKMPvt4jZ8F71XOY2yF9JNx+98bKfh5WdXq2GAL7Nq6Uo3 KfLn8Kp0O5dqjYZeCaQSMuaUmJE3xMJ+Hjjv8je7GShbQFFNY8YKqG+42V9uOpm21DqX 2cavH9DsopJFxHmz518GX7AOejraE2dw00Ly+gcqnjNxEU861osit10n9wkODkePQq2J VOJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=bQvsgscqpy4gJx0RSAZHmPdNixt0ATCDS0WU9XTwyb8=; b=JLAxb5NYDLIczaFT6FL0WENwA+0Vuqt6gdjh7F0eEU7IdLF8JGh+6yvbXHnprmuUlo 80/XZ2W1sNJN90+Qt00rpFCXpLPL1LdAhaAC3VMhs6mx2soofixED+CaaEs6SHI0jBlb xnD6IQXX+iZDifW+63IXVO8LIrr3DEsV0GvOI9liDnaOV1vZdOzbb8hKYrlciL82+uWc WeJdhoPkGDGfrKxACGt833T780ta9QghYUOfH96QetEYaCwFlcbse3f60QebY6JjwXix lb6PCATMTBOzPynFREzP+g61R5+YI56y61mNMSNFxnydBYrvuraelvHtJevAks0zII01 kH9g== X-Gm-Message-State: APjAAAU4/ZWbcJ45guus18bkm0ufBQpJJQjwUELptGFSUbf8qhKtvbwZ uGiVauOAkJDzGJFmn58fqD5DMg== X-Google-Smtp-Source: APXvYqzfJ8BXdrEH0K8CKkw4fBwWFDafodl10SDkUCPN4bBIEhI2MWQI353Halx8ux+skSlbJLzXYQ== X-Received: by 2002:ae9:ec1a:: with SMTP id h26mr17120619qkg.80.1566412331857; Wed, 21 Aug 2019 11:32:11 -0700 (PDT) Received: from localhost.localdomain (c-73-69-118-222.hsd1.nh.comcast.net. [73.69.118.222]) by smtp.gmail.com with ESMTPSA id q13sm10443332qkm.120.2019.08.21.11.32.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Aug 2019 11:32:11 -0700 (PDT) From: Pavel Tatashin To: pasha.tatashin@soleen.com, jmorris@namei.org, sashal@kernel.org, ebiederm@xmission.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, corbet@lwn.net, catalin.marinas@arm.com, will@kernel.org, linux-arm-kernel@lists.infradead.org, marc.zyngier@arm.com, james.morse@arm.com, vladimir.murzin@arm.com, matthias.bgg@gmail.com, bhsharma@redhat.com, linux-mm@kvack.org, mark.rutland@arm.com Subject: [PATCH v3 04/17] arm64, hibernate: rename dst to page in create_safe_exec_page Date: Wed, 21 Aug 2019 14:31:51 -0400 Message-Id: <20190821183204.23576-5-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190821183204.23576-1-pasha.tatashin@soleen.com> References: <20190821183204.23576-1-pasha.tatashin@soleen.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190821_113212_651491_DD3F1494 X-CRM114-Status: GOOD ( 10.83 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org create_safe_exec_page() allocates a safe page and maps it at a specific location, also this function returns the physical address of newly allocated page. The destination VA, and PA are specified in arguments: dst_addr, phys_dst_addr However, within the function it uses "dst" which has unsigned long type, but is actually a pointers in the current virtual space. This is confusing to read. Rename dst to more appropriate page (page that is created), and also change its time to "void *" Signed-off-by: Pavel Tatashin --- arch/arm64/kernel/hibernate.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c index c8211108ec11..ee34a06d8a35 100644 --- a/arch/arm64/kernel/hibernate.c +++ b/arch/arm64/kernel/hibernate.c @@ -198,17 +198,17 @@ static int create_safe_exec_page(void *src_start, size_t length, unsigned long dst_addr, phys_addr_t *phys_dst_addr) { + void *page = (void *)get_safe_page(GFP_ATOMIC); pgd_t *pgdp; pud_t *pudp; pmd_t *pmdp; pte_t *ptep; - unsigned long dst = get_safe_page(GFP_ATOMIC); - if (!dst) + if (!page) return -ENOMEM; - memcpy((void *)dst, src_start, length); - __flush_icache_range(dst, dst + length); + memcpy(page, src_start, length); + __flush_icache_range((unsigned long)page, (unsigned long)page + length); pgdp = pgd_offset_raw((void *)get_safe_page(GFP_ATOMIC), dst_addr); if (pgd_none(READ_ONCE(*pgdp))) { @@ -235,7 +235,7 @@ static int create_safe_exec_page(void *src_start, size_t length, } ptep = pte_offset_kernel(pmdp, dst_addr); - set_pte(ptep, pfn_pte(virt_to_pfn(dst), PAGE_KERNEL_EXEC)); + set_pte(ptep, pfn_pte(virt_to_pfn(page), PAGE_KERNEL_EXEC)); /* * Load our new page tables. A strict BBM approach requires that we @@ -254,7 +254,7 @@ static int create_safe_exec_page(void *src_start, size_t length, write_sysreg(phys_to_ttbr(virt_to_phys(pgdp)), ttbr0_el1); isb(); - *phys_dst_addr = virt_to_phys((void *)dst); + *phys_dst_addr = virt_to_phys(page); return 0; } -- 2.23.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel