From patchwork Fri Jun 21 00:24:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 13706603 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 76925F9E6; Fri, 21 Jun 2024 00:27:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.156.1 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718929622; cv=none; b=KGCTBMVKdkP+TgOPZXCbB8lEqqzVqTLaO4DH3ssH/6ZjgsngNVm/TNC6/J3bx6haUdAczEoVb7pjIdgwP7F3Qo/jUaZWv6MEd5/LJV6lsmEkKWRKkk1dckEELovpQcYDati6K8zSTqgj0SzjLxGZu9P91E6JQt9fLeijcjLIu74= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718929622; c=relaxed/simple; bh=VZxS36owFyTFwfF0o1KxTwsjbCK5h/6199Ow8SsXxP8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EetbZdkSmNLiUdR2+LkptKJSqndxw8d8sLVjBFvv/ZZlrrnAikLu8MqUzodg9DHmGHTs/iNv+Cd538vPR3BqHQQbLnzHJMGZPq0c3k2yZCLG/esHScaf1g9tkJ56roB/C6eZdmh1DgnQJJHK0JWIGXbXa7izR23Rgs2VKhhvDB8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=h0Zvssk6; arc=none smtp.client-ip=148.163.156.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="h0Zvssk6" Received: from pps.filterd (m0356517.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 45KNSUVn000458; Fri, 21 Jun 2024 00:26:37 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from :to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=pp1; bh=3hDUyT9rvjh/u qttZeOy24s2Df+NNUjOmmqDaE5+6Vk=; b=h0Zvssk6U31qRBTvZ/Pep/F4zOG0K UMB+ltMG9SJ3UggEFvoAJ5AKPGn4mpzEhBQuM3OcoBV5mfxgW0+h6XdotimhQlqk +pELs0lzCnCQS2yvB46M5gVhI64pV53Rq71bjpy4OvrE4uAarl8+UOTG2EKdX7JI 0Zw2IW9a+UG1Ayn7x7zQyt7ZeexSF9Vbk9xcuMSyGwuoijUhKu+GkZh6rXN/LIkX W7ZaR8WhLDcweillMTLmQx7MsOx1fcg/nx7srbr0Av/UI1OejqBuB6HSa+z7438j I0VEw4cNTnnAaJnhT04NFnCgscpsJifpLcjlb3GFFqeXXRwkbAG3tUidQ== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3yvw8c0704-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 21 Jun 2024 00:26:37 +0000 (GMT) Received: from m0356517.ppops.net (m0356517.ppops.net [127.0.0.1]) by pps.reinject (8.18.0.8/8.18.0.8) with ESMTP id 45L0QaeN022669; Fri, 21 Jun 2024 00:26:36 GMT Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3yvw8c0700-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 21 Jun 2024 00:26:36 +0000 (GMT) Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 45L0G6WD031351; Fri, 21 Jun 2024 00:26:34 GMT Received: from smtprelay06.fra02v.mail.ibm.com ([9.218.2.230]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3yvrrq2na9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 21 Jun 2024 00:26:34 +0000 Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay06.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 45L0QSun21299646 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 Jun 2024 00:26:30 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8A3E020043; Fri, 21 Jun 2024 00:26:28 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6ACD22004D; Fri, 21 Jun 2024 00:26:27 +0000 (GMT) Received: from heavy.ibm.com (unknown [9.171.10.44]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 21 Jun 2024 00:26:27 +0000 (GMT) From: Ilya Leoshkevich To: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , Heiko Carstens , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka Cc: Christian Borntraeger , Dmitry Vyukov , Hyeonggon Yoo <42.hyeyoo@gmail.com>, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Mark Rutland , Roman Gushchin , Sven Schnelle , Ilya Leoshkevich Subject: [PATCH v6 07/39] kmsan: Remove a useless assignment from kmsan_vmap_pages_range_noflush() Date: Fri, 21 Jun 2024 02:24:41 +0200 Message-ID: <20240621002616.40684-8-iii@linux.ibm.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240621002616.40684-1-iii@linux.ibm.com> References: <20240621002616.40684-1-iii@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 9aqDnYqiZJrIWgkclNbtCMnokhICs_wR X-Proofpoint-GUID: M6kl4HuHEuc2TVbCgmc2mbFwZv4B5LNB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-06-20_11,2024-06-20_04,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 phishscore=0 mlxscore=0 bulkscore=0 priorityscore=1501 spamscore=0 impostorscore=0 clxscore=1015 adultscore=0 malwarescore=0 mlxlogscore=999 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2406140001 definitions=main-2406210001 The value assigned to prot is immediately overwritten on the next line with PAGE_KERNEL. The right hand side of the assignment has no side-effects. Fixes: b073d7f8aee4 ("mm: kmsan: maintain KMSAN metadata for page operations") Suggested-by: Alexander Gordeev Reviewed-by: Alexander Potapenko Signed-off-by: Ilya Leoshkevich --- mm/kmsan/shadow.c | 1 - 1 file changed, 1 deletion(-) diff --git a/mm/kmsan/shadow.c b/mm/kmsan/shadow.c index b9d05aff313e..2d57408c78ae 100644 --- a/mm/kmsan/shadow.c +++ b/mm/kmsan/shadow.c @@ -243,7 +243,6 @@ int kmsan_vmap_pages_range_noflush(unsigned long start, unsigned long end, s_pages[i] = shadow_page_for(pages[i]); o_pages[i] = origin_page_for(pages[i]); } - prot = __pgprot(pgprot_val(prot) | _PAGE_NX); prot = PAGE_KERNEL; origin_start = vmalloc_meta((void *)start, KMSAN_META_ORIGIN);