From mboxrd@z Thu Jan 1 00:00:00 1970 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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 26D69C43468 for ; Mon, 21 Sep 2020 02:03:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D3764207C3 for ; Mon, 21 Sep 2020 02:03:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D3764207C3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E28EA90001A; Sun, 20 Sep 2020 22:03:01 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id DB351900018; Sun, 20 Sep 2020 22:03:01 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C2DD290001A; Sun, 20 Sep 2020 22:03:01 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0037.hostedemail.com [216.40.44.37]) by kanga.kvack.org (Postfix) with ESMTP id A7DDE900018 for ; Sun, 20 Sep 2020 22:03:01 -0400 (EDT) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 712071EE6 for ; Mon, 21 Sep 2020 02:03:01 +0000 (UTC) X-FDA: 77285420562.27.humor71_120bb5a27141 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin27.hostedemail.com (Postfix) with ESMTP id 52AFF3D663 for ; Mon, 21 Sep 2020 02:03:01 +0000 (UTC) X-HE-Tag: humor71_120bb5a27141 X-Filterd-Recvd-Size: 2046 Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Mon, 21 Sep 2020 02:03:00 +0000 (UTC) Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id A042E89730D559E4C866; Mon, 21 Sep 2020 10:02:55 +0800 (CST) Received: from mdc.huawei.com (10.175.112.208) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.487.0; Mon, 21 Sep 2020 10:02:47 +0800 From: Chen Jun To: , CC: , , , Subject: [PATCH -next 2/5] mm/kmemleak: skip update_checksum for OBJECT_NO_SCAN objects Date: Mon, 21 Sep 2020 02:00:04 +0000 Message-ID: <20200921020007.35803-3-chenjun102@huawei.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200921020007.35803-1-chenjun102@huawei.com> References: <20200921020007.35803-1-chenjun102@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.175.112.208] X-CFilter-Loop: Reflected Content-Transfer-Encoding: quoted-printable 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: Wei Yongjun Objects marked with OBJECT_NO_SCAN are never scanned. So there is no need to update checksum for them. Signed-off-by: Wei Yongjun Signed-off-by: Chen Jun --- mm/kmemleak.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/kmemleak.c b/mm/kmemleak.c index b3f603fd9fc3..c09c6b59eda6 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -1166,6 +1166,10 @@ static bool update_checksum(struct kmemleak_object= *object) { u32 old_csum =3D object->checksum; =20 + /* always return false for not scan object */ + if (object->flags & OBJECT_NO_SCAN) + return false; + kasan_disable_current(); kcsan_disable_current(); object->checksum =3D crc32(0, (void *)object->pointer, object->size); --=20 2.25.0