From patchwork Fri Mar 25 01:10:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 12791133 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id DB454C433F5 for ; Fri, 25 Mar 2022 01:10:17 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6E7988D0008; Thu, 24 Mar 2022 21:10:17 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6BD8E8D0002; Thu, 24 Mar 2022 21:10:17 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 586138D0008; Thu, 24 Mar 2022 21:10:17 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.hostedemail.com [64.99.140.28]) by kanga.kvack.org (Postfix) with ESMTP id 48C578D0002 for ; Thu, 24 Mar 2022 21:10:17 -0400 (EDT) Received: from smtpin06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 1D6CF206E4 for ; Fri, 25 Mar 2022 01:10:17 +0000 (UTC) X-FDA: 79281127674.06.9FE8F0A Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf28.hostedemail.com (Postfix) with ESMTP id A0804C0038 for ; Fri, 25 Mar 2022 01:10:16 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 72050B82707; Fri, 25 Mar 2022 01:10:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 16B75C340EC; Fri, 25 Mar 2022 01:10:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1648170614; bh=nYie1+SN9sysGNRT83X8/SvXk/WcEsbVmaNNq0/qfg4=; h=Date:To:From:In-Reply-To:Subject:From; b=MzF4+tzbzXgw9xrQbjSdqf4FygPZLmg6lEMQPvjz+dywzjTm0xwf2S7xVMw1Ii20v WLzQIgTbP9rKP/lgI4hQWhwD6LDwEB33BsL2j6fM7rGpMPkylJ2i7L01jaJVhOjVj3 9KCfUMA3YR5kY1C8CLGVGwoy0OtNKn8ebADxKaTM= Date: Thu, 24 Mar 2022 18:10:13 -0700 To: will@kernel.org,vincenzo.frascino@arm.com,ryabinin.a.a@gmail.com,pcc@google.com,mark.rutland@arm.com,glider@google.com,eugenis@google.com,elver@google.com,dvyukov@google.com,catalin.marinas@arm.com,andreyknvl@google.com,akpm@linux-foundation.org,patches@lists.linux.dev,linux-mm@kvack.org,mm-commits@vger.kernel.org,torvalds@linux-foundation.org,akpm@linux-foundation.org From: Andrew Morton In-Reply-To: <20220324180758.96b1ac7e17675d6bc474485e@linux-foundation.org> Subject: [patch 033/114] kasan, page_alloc: simplify kasan_poison_pages call site Message-Id: <20220325011014.16B75C340EC@smtp.kernel.org> Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=MzF4+tzb; spf=pass (imf28.hostedemail.com: domain of akpm@linux-foundation.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: A0804C0038 X-Stat-Signature: 1egsi183yhpipa9ehbfmwethdog9rpoz X-HE-Tag: 1648170616-345520 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, page_alloc: simplify kasan_poison_pages call site Simplify the code around calling kasan_poison_pages() in free_pages_prepare(). This patch does no functional changes. Link: https://lkml.kernel.org/r/ae4f9bcf071577258e786bcec4798c145d718c46.1643047180.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Reviewed-by: Alexander Potapenko Acked-by: Marco Elver Cc: Andrey Ryabinin Cc: Catalin Marinas Cc: Dmitry Vyukov Cc: Evgenii Stepanov Cc: Mark Rutland Cc: Peter Collingbourne Cc: Vincenzo Frascino Cc: Will Deacon Signed-off-by: Andrew Morton --- mm/page_alloc.c | 18 +++++------------- 1 file changed, 5 insertions(+), 13 deletions(-) --- a/mm/page_alloc.c~kasan-page_alloc-simplify-kasan_poison_pages-call-site +++ a/mm/page_alloc.c @@ -1298,6 +1298,7 @@ static __always_inline bool free_pages_p { int bad = 0; bool skip_kasan_poison = should_skip_kasan_poison(page, fpi_flags); + bool init = want_init_on_free(); VM_BUG_ON_PAGE(PageTail(page), page); @@ -1370,19 +1371,10 @@ static __always_inline bool free_pages_p * With hardware tag-based KASAN, memory tags must be set before the * page becomes unavailable via debug_pagealloc or arch_free_page. */ - if (kasan_has_integrated_init()) { - bool init = want_init_on_free(); - - if (!skip_kasan_poison) - kasan_poison_pages(page, order, init); - } else { - bool init = want_init_on_free(); - - if (init) - kernel_init_free_pages(page, 1 << order); - if (!skip_kasan_poison) - kasan_poison_pages(page, order, init); - } + if (init && !kasan_has_integrated_init()) + kernel_init_free_pages(page, 1 << order); + if (!skip_kasan_poison) + kasan_poison_pages(page, order, init); /* * arch_free_page() can make the page's contents inaccessible. s390