From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752424AbcIAGlZ (ORCPT ); Thu, 1 Sep 2016 02:41:25 -0400 Received: from mail-pf0-f195.google.com ([209.85.192.195]:35675 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750861AbcIAGlY (ORCPT ); Thu, 1 Sep 2016 02:41:24 -0400 From: Ganesh Mahendran To: gregkh@linuxfoundation.org, arve@android.com, riandrews@android.com Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, Ganesh Mahendran Subject: [PATCH] android: binder: use VM_ALLOC to get vm area. Date: Thu, 1 Sep 2016 14:41:04 +0800 Message-Id: <1472712064-3643-1-git-send-email-opensource.ganesh@gmail.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Also 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 use VM_ALLOC to get vm area. Signed-off-by: Ganesh Mahendran --- drivers/android/binder.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/android/binder.c b/drivers/android/binder.c index 16288e7..3511d5c 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -2885,7 +2885,7 @@ static int binder_mmap(struct file *filp, struct vm_area_struct *vma) 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"; -- 1.9.1