From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-2951738-1517591634-2-13984376839331212206 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1517591633; b=WwqPMuhnFMujdH5+wtns9wTrbWlM5Y7QWQOTva33p+MudNS kmEBALaC/5P20nctCZCrc7N+gKYKHfv4M+gIXHxZ+b1aOeomuf1qB1E0d9JnNyee DtfQFs997qUHDamIZlNxkXYPb5NP7I2ezyu2noSnWSRFlDRV5SKuIrXL1mUptxB0 0/zX+hkgt9ArAlATAK7oXP1cArkQqJjgrVusYoTpdPKYzmuvBRjBCNa68pIy7DfK a+z2P98vrVx9FdWODxdaV5t3mi8ria8GgBJCJJOYdONC5g1E/US0NXyYNR+DgO0l 9GlY/3S2lYVyA7Wfy3yqaUtvWljFhjNOHZZF4Lw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=arctest; t=1517591633; bh=QJJzDayzoABr3f9zrXuxSfhZN5 7YiX9sAih7rGsVJdk=; b=Hlw91urkJUIM22q7Xmo44CdV+Jwwz+LA+fw1v0HI4Z BKHQ3THV3ORZdTEwqbJFyEG7qJJaivVLdXb9hz4oixS8493Cojr+Cl73AJn1sD7i 8GlQ6daGmHcyZFmxsT1K2N5xn/CxWPPnAqWlnHJdJI90Cpu2OGZsHpmIsBeHlhqS SLC2sVTpJ+NtImzJ5gSI6CRrDrU0ctvUA5QqcJ/MaMcKd2g6oisr+2dZ+6Cftle4 aRuH8KirzPed27xgC52JbworTCMVZwwKjTU5/3fswDs2w3NXXtCiPlXIdteI54hh wMUe9KkAT6FpeqtaSCNxdW3Eok9WtClDGIU1FMW/5vdQ== ARC-Authentication-Results: i=1; mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Authentication-Results: mx3.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753149AbeBBRNv (ORCPT ); Fri, 2 Feb 2018 12:13:51 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:39554 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753534AbeBBRNq (ORCPT ); Fri, 2 Feb 2018 12:13:46 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ganesh Mahendran , Martijn Coenen , Todd Kjos Subject: [PATCH 4.14 145/156] android: binder: use VM_ALLOC to get vm area Date: Fri, 2 Feb 2018 17:58:46 +0100 Message-Id: <20180202140846.937885894@linuxfoundation.org> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180202140840.242829545@linuxfoundation.org> References: <20180202140840.242829545@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ganesh Mahendran commit aac6830ec1cb681544212838911cdc57f2638216 upstream. VM_IOREMAP is used to access hardware through a mechanism called I/O mapped memory. Android binder is a IPC machanism which will not access I/O memory. And VM_IOREMAP has alignment requiement which may not needed in binder. __get_vm_area_node() { ... if (flags & VM_IOREMAP) align = 1ul << clamp_t(int, fls_long(size), PAGE_SHIFT, IOREMAP_MAX_ORDER); ... } This patch will save some kernel vm area, especially for 32bit os. In 32bit OS, kernel vm area is only 240MB. We may got below error when launching a app: <3>[ 4482.440053] binder_alloc: binder_alloc_mmap_handler: 15728 8ce67000-8cf65000 get_vm_area failed -12 <3>[ 4483.218817] binder_alloc: binder_alloc_mmap_handler: 15745 8ce67000-8cf65000 get_vm_area failed -12 Signed-off-by: Ganesh Mahendran Acked-by: Martijn Coenen Acked-by: Todd Kjos Signed-off-by: Greg Kroah-Hartman --- drivers/android/binder_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -668,7 +668,7 @@ int binder_alloc_mmap_handler(struct bin goto err_already_mapped; } - area = get_vm_area(vma->vm_end - vma->vm_start, VM_IOREMAP); + area = get_vm_area(vma->vm_end - vma->vm_start, VM_ALLOC); if (area == NULL) { ret = -ENOMEM; failure_string = "get_vm_area";