From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) (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 3C3A22472A6; Thu, 9 Apr 2026 23:49:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.177.32 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775778572; cv=none; b=ShrMM6x0+LefEzwam8HXnGsF0OyLFrYLCBSnjmizbJNVVEK6SrwcSL/oP/d2IbsL2DiDlrtS3hJdItmITUHEg3D2vtnO33l1xjYwxvgTDysgF78gQAQUGZi6/eG9ceV8/hlplkwMczVgAzL2JGjfh7lED6YeM/8o1x0ZS4DRkJI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775778572; c=relaxed/simple; bh=PjkluNeBKLU/DAnrfq5KTecHLoRi7e71XyXWKky1H9U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pGfnBjKFeC8YNyEgK1kuR1t0ysrRr216/SPfhbn2XPI/Nj8sWXY/rAGB7UvyBRlF4hDEU9t8TDAkS5pxfMlAYWB5dPFwx2H60dwjKavJ+y4vdSezn3g0jdQ0Gc4xhmf0uY75ag3UZWogF8QfOarJE5xzZbkfqLW2EKW+lc9/xn0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com; spf=pass smtp.mailfrom=oracle.com; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b=VIYvcBlj; arc=none smtp.client-ip=205.220.177.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oracle.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="VIYvcBlj" Received: from pps.filterd (m0246632.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 639JtUKa3739892; Thu, 9 Apr 2026 23:49:21 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=corp-2025-04-25; bh=xeTDX q96Co1al8+5coiV+ril45NeFzPvEgmMDiXr3gU=; b=VIYvcBlj5RIHKJLVTWFh+ F6zC18mZZVWnUKmmNKa4N6nXnQ8HgyIl08wTIAB2GYfsLH9W8qgvKwiRKmk1XBaT HCoXaajRsY7dHLZHrTrmHo1ZE7Xp6+HYlu0AnanzzmEaOUYxIKcqxA3NT3BLxVMz a22o4aIXfuPcMMv7L94Q1MXBMp0DO0b2CCmwb2THxtJs43h9xIvMy7c7HHWKlHAY CUnJl+5fN67whh7OnyA1dMj5w/wxX4S5nUV75XhueotMYk/98Cwh8n8+A8ahFQRu 3Qpd0hnPCk7qRin3sjeMBmplO6LIeV6hpbIze1zgeNQF1CNLbUO+gUx0QQsaAI5f w== Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.appoci.oracle.com [130.35.100.223]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4dcmqb8gd9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 09 Apr 2026 23:49:21 +0000 (GMT) Received: from pps.filterd (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 639LMfqm003466; Thu, 9 Apr 2026 23:49:20 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 4dcn5ytfys-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 09 Apr 2026 23:49:20 +0000 Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 639NnIZO019990; Thu, 9 Apr 2026 23:49:19 GMT Received: from localhost.localdomain (ca-dev60.us.oracle.com [10.129.136.27]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 4dcn5ytfx5-2; Thu, 09 Apr 2026 23:49:19 +0000 From: Anthony Yznaga To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, Liam.Howlett@oracle.com, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, jannh@google.com, pfalcato@suse.de, Jason@zx2c4.com, shuah@kernel.org Subject: [PATCH v3 1/2] mm: fix mmap errno value when MAP_DROPPABLE is not supported Date: Thu, 9 Apr 2026 16:49:14 -0700 Message-ID: <20260409234915.11723-2-anthony.yznaga@oracle.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260409234915.11723-1-anthony.yznaga@oracle.com> References: <20260409234915.11723-1-anthony.yznaga@oracle.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-09_05,2026-04-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 bulkscore=0 mlxlogscore=999 phishscore=0 adultscore=0 malwarescore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2604010000 definitions=main-2604090220 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDA5MDIyMCBTYWx0ZWRfX5H87J1Gz6dBK k8SEey6hvPTvDAALgeUivENePYNF4oyr3jnDd69gpT9J2UZVbsWW+PS8bUTxnC1e+ftxovB1Db2 2/avwjIAxG+HgvxwjxMs2nrrHEtxXh6D1HhAfks2kSQrHfFsZ5xAJwDaWjg1Gq4GT5xp5BDp+wN 4pdK2lHqy6tpIJMg42va9UU4JiYbjWBsNPtR19PZBzHG5z694hL1nbH0O9//CrJFwmqLxV4pzYM l8Yq4xJCiuypBttbzBHqoILMyO815Cz1FAeLFWh1y1sdFa0Swnkb/nwy+Lfks97fIisu/i9wwus EXja5MJ6RWzJoxLgmafvWiVTYcb932kW4xsQ1WGYR4ETfxKzDPDYJYkwnRIgUSCZBk3NoZUbLKf 7fA9nVzliq393jDQhYlNYEprN65DSTudAWeyP064ZuSsbw22UF5sL11df7MRN1MnA0xNdDPX/FN QhFgOVdOyMlYuvo7xlO25xwzXJ6RdBTNbNEmxpD8= X-Proofpoint-ORIG-GUID: SAu5W7twNTgdfLpt5e8uL8sMpwAaarjQ X-Proofpoint-GUID: SAu5W7twNTgdfLpt5e8uL8sMpwAaarjQ X-Authority-Analysis: v=2.4 cv=cK7QdFeN c=1 sm=1 tr=0 ts=69d83b01 b=1 cx=c_pps a=zPCbziy225d3KhSqZt3L1A==:117 a=zPCbziy225d3KhSqZt3L1A==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=3I1J8UUJPc9JN9BFgKH3:22 a=VwQbUJbxAAAA:8 a=yPCof4ZbAAAA:8 a=Dv_WXUeMNy8hEQbTb70A:9 cc=ntf awl=host:12291 On configs where MAP_DROPPABLE is not supported (currently any 32-bit config except for PPC32), mmap fails with errno set to ENOTSUPP. However, ENOTSUPP is not a standard error value that userspace knows about. The acceptable userspace-visible errno to use is EOPNOTSUPP. checkpatch.pl has a warning to this effect. Fixes: 9651fcedf7b9 ("mm: add MAP_DROPPABLE for designating always lazily freeable mappings") Cc: Signed-off-by: Anthony Yznaga Acked-by: David Hildenbrand Acked-by: Vlastimil Babka (SUSE) Reported-by: Mark Brown Reviewed-by: Pedro Falcato Reviewed-by: Lorenzo Stoakes (Oracle) --- mm/mmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/mmap.c b/mm/mmap.c index 5754d1c36462..2311ae7c2ff4 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -504,7 +504,7 @@ unsigned long do_mmap(struct file *file, unsigned long addr, break; case MAP_DROPPABLE: if (VM_DROPPABLE == VM_NONE) - return -ENOTSUPP; + return -EOPNOTSUPP; /* * A locked or stack area makes no sense to be droppable. * -- 2.47.3