From mboxrd@z Thu Jan 1 00:00:00 1970 From: 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> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Catalin Marinas , Will Deacon Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, srv_wsdupstream@mediatek.com, linux-mediatek@lists.infradead.org, Miles Chen List-Id: linux-mediatek@lists.infradead.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