From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759110AbcBYDop (ORCPT ); Wed, 24 Feb 2016 22:44:45 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:53563 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752373AbcBYDoo (ORCPT ); Wed, 24 Feb 2016 22:44:44 -0500 From: To: Catalin Marinas , Will Deacon CC: , , , , Miles Chen Subject: [PATCH] arm64/mm: remove unnecessary boundary check Date: Thu, 25 Feb 2016 11:44:34 +0800 Message-ID: <1456371874-19826-1-git-send-email-miles.chen@mediatek.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Miles Chen Remove the unnecessary boundary check since there is a huge gap between user and kernel address that they would never overlap. (arm64 does not have enough levels of page tables to cover 64-bit virtual address) See Documentation/arm64/memory.txt Signed-off-by: Miles Chen --- arch/arm64/mm/init.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index f3b061e..4579604 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -343,8 +343,6 @@ void __init mem_init(void) #ifdef CONFIG_COMPAT BUILD_BUG_ON(TASK_SIZE_32 > TASK_SIZE_64); #endif - BUILD_BUG_ON(TASK_SIZE_64 > MODULES_VADDR); - BUG_ON(TASK_SIZE_64 > MODULES_VADDR); if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) { extern int sysctl_overcommit_memory; -- 1.9.1