From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754641AbcGZDFp (ORCPT ); Mon, 25 Jul 2016 23:05:45 -0400 Received: from pmta2.delivery5.ore.mailhop.org ([54.186.218.12]:30511 "EHLO pmta2.delivery5.ore.mailhop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754514AbcGZDFe (ORCPT ); Mon, 25 Jul 2016 23:05:34 -0400 X-MHO-User: f59839d3-52dd-11e6-8929-8ded99d5e9d7 X-Report-Abuse-To: https://support.duocircle.com/support/solutions/articles/5000540958-duocircle-standard-smtp-abuse-information X-Originating-IP: 74.99.77.15 X-Mail-Handler: DuoCircle Outbound SMTP From: Jason Cooper To: william.c.roberts@intel.com, linux-mm@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-hardening@lists.openwall.com Cc: Jason Cooper , linux@arm.linux.org.uk, akpm@linux-foundation.org, keescook@chromium.org, tytso@mit.edu, arnd@arndb.de, gregkh@linuxfoundation.org, catalin.marinas@arm.com, will.deacon@arm.com, ralf@linux-mips.org, benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, davem@davemloft.net, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, viro@zeniv.linux.org.uk, nnk@google.com, jeffv@google.com, alyzyn@android.com, dcashman@android.com Subject: [RFC patch 6/6] unicore32: Use simpler API for random address requests Date: Tue, 26 Jul 2016 03:02:00 +0000 Message-Id: <20160726030201.6775-6-jason@lakedaemon.net> X-Mailer: git-send-email 2.9.2 In-Reply-To: <20160726030201.6775-1-jason@lakedaemon.net> References: <1469471141-25669-1-git-send-email-william.c.roberts@intel.com> <20160726030201.6775-1-jason@lakedaemon.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, all callers to randomize_range() set the length to 0 and calculate end by adding a constant to the start address. We can simplify the API to remove a bunch of needless checks and variables. Use the new randomize_addr(start, range) call to set the requested address. Signed-off-by: Jason Cooper --- arch/unicore32/kernel/process.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c index 00299c927852..b856178cf167 100644 --- a/arch/unicore32/kernel/process.c +++ b/arch/unicore32/kernel/process.c @@ -295,8 +295,7 @@ unsigned long get_wchan(struct task_struct *p) unsigned long arch_randomize_brk(struct mm_struct *mm) { - unsigned long range_end = mm->brk + 0x02000000; - return randomize_range(mm->brk, range_end, 0) ? : mm->brk; + return randomize_addr(mm->brk, 0x02000000); } /* -- 2.9.2