From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f70.google.com (mail-pa0-f70.google.com [209.85.220.70]) by kanga.kvack.org (Postfix) with ESMTP id E6E286B0262 for ; Wed, 3 Aug 2016 19:39:53 -0400 (EDT) Received: by mail-pa0-f70.google.com with SMTP id ag5so378262207pad.2 for ; Wed, 03 Aug 2016 16:39:53 -0700 (PDT) Received: from pmta2.delivery5.ore.mailhop.org (pmta2.delivery5.ore.mailhop.org. [54.186.218.12]) by mx.google.com with ESMTPS id g79si11195538pfb.219.2016.08.03.16.39.52 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 03 Aug 2016 16:39:52 -0700 (PDT) From: Jason Cooper Subject: [PATCH v3 5/7] tile: Use simpler API for random address requests Date: Wed, 3 Aug 2016 23:39:11 +0000 Message-Id: <20160803233913.32511-6-jason@lakedaemon.net> In-Reply-To: <20160803233913.32511-1-jason@lakedaemon.net> References: <20160728204730.27453-1-jason@lakedaemon.net> <20160803233913.32511-1-jason@lakedaemon.net> Sender: owner-linux-mm@kvack.org List-ID: To: Kees Cook , Michael Ellerman , "Roberts, William C" , Yann Droneaud Cc: Linux-MM , LKML , kernel-hardening , Russell King - ARM Linux , Andrew Morton , Theodore Ts'o , Arnd Bergmann , gregkh@linuxfoundation.org, Catalin Marinas , Will Deacon , Ralf Baechle , benh@kernel.crashing.org, paulus@samba.org, "David S. Miller" , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , x86@kernel.org, viro@zeniv.linux.org.uk, Nick Kralevich , Jeffrey Vander Stoep , Daniel Cashman , Jason Cooper 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 --- Changes from v2: - s/randomize_addr/randomize_page/ (Kees Cook) arch/tile/mm/mmap.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/tile/mm/mmap.c b/arch/tile/mm/mmap.c index 851a94e6ae58..ef61c597898b 100644 --- a/arch/tile/mm/mmap.c +++ b/arch/tile/mm/mmap.c @@ -88,6 +88,5 @@ void arch_pick_mmap_layout(struct mm_struct *mm) 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_page(mm->brk, 0x02000000); } -- 2.9.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org