From patchwork Fri Dec 18 22:04:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 11983143 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 46D62C4361B for ; Fri, 18 Dec 2020 22:04:46 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D018423B54 for ; Fri, 18 Dec 2020 22:04:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D018423B54 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 693A46B009C; Fri, 18 Dec 2020 17:04:45 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 642876B009D; Fri, 18 Dec 2020 17:04:45 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 558B66B009E; Fri, 18 Dec 2020 17:04:45 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0056.hostedemail.com [216.40.44.56]) by kanga.kvack.org (Postfix) with ESMTP id 3D2C56B009C for ; Fri, 18 Dec 2020 17:04:45 -0500 (EST) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 07AA58249980 for ; Fri, 18 Dec 2020 22:04:45 +0000 (UTC) X-FDA: 77607783330.21.hope20_130034027440 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin21.hostedemail.com (Postfix) with ESMTP id DD6321815EB48 for ; Fri, 18 Dec 2020 22:04:44 +0000 (UTC) X-HE-Tag: hope20_130034027440 X-Filterd-Recvd-Size: 3178 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf35.hostedemail.com (Postfix) with ESMTP for ; Fri, 18 Dec 2020 22:04:44 +0000 (UTC) Date: Fri, 18 Dec 2020 14:04:42 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1608329083; bh=qTjQu+aAiKh3WeHDrcy3Ad4bAKWypLWyNRllSXK4W20=; h=From:To:Subject:In-Reply-To:From; b=PwJlgHek4is7XozRRfKSjFcOq0gkuqJC9rrAFGsgLLuB68rtFy1DbeAvydbmolRye l09j6l24hDMo4zXkMLyyr/2C37+eNHyPgAnABgZvkGlAco8ZnNeGEWh4pRsWxiPwFu Nkk6jWofWzw59+PUOWC5zq0JCA9/w3YwDWwSwpOk= From: Andrew Morton To: akpm@linux-foundation.org, andreyknvl@google.com, aryabinin@virtuozzo.com, Branislav.Rankov@arm.com, catalin.marinas@arm.com, dvyukov@google.com, elver@google.com, eugenis@google.com, glider@google.com, gor@linux.ibm.com, kevin.brodsky@arm.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, vincenzo.frascino@arm.com, will.deacon@arm.com Subject: [patch 60/78] kasan: remove __kasan_unpoison_stack Message-ID: <20201218220442.8aFrp07ly%akpm@linux-foundation.org> In-Reply-To: <20201218140046.497484741326828e5b5d46ec@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Andrey Konovalov Subject: kasan: remove __kasan_unpoison_stack There's no need for __kasan_unpoison_stack() helper, as it's only currently used in a single place. Removing it also removes unneeded arithmetic. No functional changes. Link: https://lkml.kernel.org/r/93e78948704a42ea92f6248ff8a725613d721161.1606162397.git.andreyknvl@google.com Link: https://linux-review.googlesource.com/id/Ie5ba549d445292fe629b4a96735e4034957bcc50 Signed-off-by: Andrey Konovalov Reviewed-by: Dmitry Vyukov Reviewed-by: Marco Elver Tested-by: Vincenzo Frascino Cc: Alexander Potapenko Cc: Andrey Ryabinin Cc: Branislav Rankov Cc: Catalin Marinas Cc: Evgenii Stepanov Cc: Kevin Brodsky Cc: Vasily Gorbik Cc: Will Deacon Signed-off-by: Andrew Morton --- mm/kasan/common.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) --- a/mm/kasan/common.c~kasan-remove-__kasan_unpoison_stack +++ a/mm/kasan/common.c @@ -64,18 +64,12 @@ void kasan_unpoison_range(const void *ad } #if CONFIG_KASAN_STACK -static void __kasan_unpoison_stack(struct task_struct *task, const void *sp) -{ - void *base = task_stack_page(task); - size_t size = sp - base; - - unpoison_range(base, size); -} - /* Unpoison the entire stack for a task. */ void kasan_unpoison_task_stack(struct task_struct *task) { - __kasan_unpoison_stack(task, task_stack_page(task) + THREAD_SIZE); + void *base = task_stack_page(task); + + unpoison_range(base, THREAD_SIZE); } /* Unpoison the stack for the current task beyond a watermark sp value. */