From patchwork Mon Jan 24 18:02:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: andrey.konovalov@linux.dev X-Patchwork-Id: 12722761 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 70297C433FE for ; Mon, 24 Jan 2022 18:43:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=+SzHXQUCWG9jbHjUxK/kHg1erkCATieYiWIbXiUOCyo=; b=LTnOLU3Dp0an3e gHeHV5a0SnZpal73s4VN6PbG8ZvdZeSMapJgRQ8TcvYtvTnQUhOkJWVZP1yBSi7TDKi03tWyLnXOH fhMDzTgq2zNszMxQ0xB7Rdvo2JT2U8HCxBozsRRPx5542IoxtprCjtvaIKATuWZ102gLxjpg/FI4I 9I7KMzLyxCuFwNeAGqkaTR2Cbf09tiL6hlgkr1XOUvPGI7EwgKaIfpCCzz8qSj/f0T3nLX5z4LfN8 FRhCBLYeFAoPZrnEmuU0N0kU5A6+iL4314JMZ0XkcWD85e00PPoS+G/qzU7F0KyrToEAyvyvyT8Ht R4KSM7mprh7lPiphXefg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nC4Hc-004a4c-Bq; Mon, 24 Jan 2022 18:41:42 +0000 Received: from out2.migadu.com ([2001:41d0:2:aacc::]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nC3hG-004MH1-2v for linux-arm-kernel@lists.infradead.org; Mon, 24 Jan 2022 18:04:07 +0000 X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1643047444; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=yIiooJ7Br0briWEQqZ6uPYrewTQt0yFaU3FLKd4NjuQ=; b=eV2kpwR8xJFcM9Sl9WgGTW1GyXnj5qihypWFh4otrwjMzPW6EgMyoLvbRozNqNB3B591up y6lIiFHxnDXiOOaMJmL1wPHK4IrO3UXm0c5KMD2FNNNVtYlOxCIaZDtllz6bDRB1eeO8nD l/OGODSVkzQZX5g+F1Cv9ilY4I4R5eo= From: andrey.konovalov@linux.dev To: Andrew Morton Cc: Andrey Konovalov , Marco Elver , Alexander Potapenko , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, linux-mm@kvack.org, Vincenzo Frascino , Catalin Marinas , Will Deacon , Mark Rutland , linux-arm-kernel@lists.infradead.org, Peter Collingbourne , Evgenii Stepanov , linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH v6 13/39] kasan, page_alloc: move kernel_init_free_pages in post_alloc_hook Date: Mon, 24 Jan 2022 19:02:21 +0100 Message-Id: In-Reply-To: References: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220124_100406_330623_F725CCA1 X-CRM114-Status: GOOD ( 12.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Andrey Konovalov Pull the kernel_init_free_pages() call in post_alloc_hook() out of the big if clause for better code readability. This also allows for more simplifications in the following patch. This patch does no functional changes. Signed-off-by: Andrey Konovalov Reviewed-by: Alexander Potapenko --- mm/page_alloc.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index c51d637cdab3..2784bd478942 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2435,14 +2435,18 @@ inline void post_alloc_hook(struct page *page, unsigned int order, init = false; } if (kasan_has_integrated_init()) { - if (!init_tags) + if (!init_tags) { kasan_unpoison_pages(page, order, init); + + /* Note that memory is already initialized by KASAN. */ + init = false; + } } else { kasan_unpoison_pages(page, order, init); - - if (init) - kernel_init_free_pages(page, 1 << order); } + /* If memory is still not initialized, do it now. */ + if (init) + kernel_init_free_pages(page, 1 << order); /* Propagate __GFP_SKIP_KASAN_POISON to page flags. */ if (kasan_hw_tags_enabled() && (gfp_flags & __GFP_SKIP_KASAN_POISON)) SetPageSkipKASanPoison(page);