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[2001:1868:205::9]) by mx.google.com with ESMTPS id c1si14139355paz.112.2016.06.16.05.30.31 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 16 Jun 2016 05:30:32 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) client-ip=2001:1868:205::9; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@linaro.org; spf=pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) smtp.mailfrom=linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org; dmarc=fail (p=NONE dis=NONE) header.from=linaro.org Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1bDWQI-0003w5-8e; Thu, 16 Jun 2016 12:29:26 +0000 Received: from mail-wm0-x22b.google.com ([2a00:1450:400c:c09::22b]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1bDWQF-0003ng-7S for linux-arm-kernel@lists.infradead.org; Thu, 16 Jun 2016 12:29:24 +0000 Received: by mail-wm0-x22b.google.com with SMTP id a66so55698393wme.0 for ; Thu, 16 Jun 2016 05:29:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id; bh=tpET19XM8dVyVcjhLnAaACY0hLQSeomTZF8zEX662JE=; b=e94jtyRz1kaVrEe3Xmg0E4mbbyda2VoNbMTJEpGrczuhZEX4OdkteYWmOGbZqLFl/S +fLTEYqLNAuyT1hg137gA7WVpg5NVfVAvJf3JYYHdPwmImSKhP1526cKj0bU9Lfbcr3Z ohy8x9Hg3z8lgp08MVLBbpyoHspfJsVydVZAQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=tpET19XM8dVyVcjhLnAaACY0hLQSeomTZF8zEX662JE=; b=cnr666s5gcu3SIJrJIjloTa0No5sqOjcKM+OiGJohSIpMqAw8/U1y8Eb7P9SfiDKAo BYG3m71B2Gs/65UwPbNGF4Dr+HFKycOItQZIxk6lQHTv2UiS3MsmU5h2hqDLM8aBPPL8 lzj+iN9RvTp6hHs9VY0GF9+BvznpcO5GrSdQC5NLQj8C0vJbj7k80da/RPqsbBRDbZsn V2QstkekM09qsS75vhczFv2iqMvRWVv4kPxc5czil3yj5XrRyN97w+tb3tuqfv81iigr LwFWo2Fcti/ttWPNG2eynf6j8fRZxLAp3lPAQkMgkgSpMN2mZrnFbuMzJ+rU/u0tHpbg LnfQ== X-Gm-Message-State: ALyK8tLhpjrLc16Igx0K9d6nhkywNMhaLaTeeY4EVRBcgueWCkLvWIXIivSYbAoPia2OSr0R X-Received: by 10.194.120.69 with SMTP id la5mr380518wjb.152.1466080141650; Thu, 16 Jun 2016 05:29:01 -0700 (PDT) Received: from ards-macbook-pro.linaroharston ([81.128.185.34]) by smtp.gmail.com with ESMTPSA id g3sm43504699wjb.47.2016.06.16.05.29.00 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 16 Jun 2016 05:29:00 -0700 (PDT) From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/2] ARM: drop kernel segment resources from /proc/iomem Date: Thu, 16 Jun 2016 14:28:57 +0200 Message-Id: <1466080138-12193-1-git-send-email-ard.biesheuvel@linaro.org> X-Mailer: git-send-email 1.9.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160616_052923_613805_A29AC08E X-CRM114-Status: GOOD ( 10.62 ) X-Spam-Score: -2.7 (--) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-2.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [2a00:1450:400c:c09:0:0:0:22b listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, keescook@chromium.org, arnd@arndb.de, Ard Biesheuvel , catalin.marinas@arm.com, linux@armlinux.org.uk MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org By the same reasoning as commit c4004b02f8e5 ("x86: remove the kernel code/data/bss resources from /proc/iomem"), the kernel code and kernel data entries in /proc/iomem probably do more harm than good on ARM as well. So remove them. Signed-off-by: Ard Biesheuvel --- arch/arm/kernel/setup.c | 26 -------------------------- 1 file changed, 26 deletions(-) -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 7b5350060612..839797c4b454 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -171,24 +171,10 @@ static struct resource mem_res[] = { .start = 0, .end = 0, .flags = IORESOURCE_MEM - }, - { - .name = "Kernel code", - .start = 0, - .end = 0, - .flags = IORESOURCE_SYSTEM_RAM - }, - { - .name = "Kernel data", - .start = 0, - .end = 0, - .flags = IORESOURCE_SYSTEM_RAM } }; #define video_ram mem_res[0] -#define kernel_code mem_res[1] -#define kernel_data mem_res[2] static struct resource io_res[] = { { @@ -843,11 +829,6 @@ static void __init request_standard_resources(const struct machine_desc *mdesc) struct memblock_region *region; struct resource *res; - kernel_code.start = virt_to_phys(_text); - kernel_code.end = virt_to_phys(_etext - 1); - kernel_data.start = virt_to_phys(_sdata); - kernel_data.end = virt_to_phys(_end - 1); - for_each_memblock(memory, region) { res = memblock_virt_alloc(sizeof(*res), 0); res->name = "System RAM"; @@ -856,13 +837,6 @@ static void __init request_standard_resources(const struct machine_desc *mdesc) res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; request_resource(&iomem_resource, res); - - if (kernel_code.start >= res->start && - kernel_code.end <= res->end) - request_resource(res, &kernel_code); - if (kernel_data.start >= res->start && - kernel_data.end <= res->end) - request_resource(res, &kernel_data); } if (mdesc->video_start) {