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Tue, 17 Aug 2021 15:47:52 +0000 From: Liam Howlett To: "maple-tree@lists.infradead.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton CC: Song Liu , Davidlohr Bueso , "Paul E . McKenney" , Matthew Wilcox , Laurent Dufour , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka , Rik van Riel , Peter Zijlstra , Michel Lespinasse , Liam Howlett Subject: [PATCH v2 30/61] arch/xtensa: Use maple tree iterators for unmapped area Thread-Topic: [PATCH v2 30/61] arch/xtensa: Use maple tree iterators for unmapped area Thread-Index: AQHXk38qWQKD7ns3skSY1UWWnaNhPw== Date: Tue, 17 Aug 2021 15:47:21 +0000 Message-ID: <20210817154651.1570984-31-Liam.Howlett@oracle.com> References: <20210817154651.1570984-1-Liam.Howlett@oracle.com> In-Reply-To: <20210817154651.1570984-1-Liam.Howlett@oracle.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.30.2 authentication-results: lists.infradead.org; dkim=none (message not signed) header.d=none;lists.infradead.org; dmarc=none action=none header.from=oracle.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: eb98c071-bb4a-474c-c692-08d961965f82 x-ms-traffictypediagnostic: DM6PR10MB4236: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:3631; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR10MB4380.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: eb98c071-bb4a-474c-c692-08d961965f82 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Aug 2021 15:47:21.3923 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 2ulWzpACcSOpBFMIRsiAC1TYyGz3JxawY+o7Ug4gtVyN6O23LCAbNrYeYYFi6tnJuGcNziSDslksBTPDb4xWJw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR10MB4236 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=10079 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 adultscore=0 mlxscore=0 malwarescore=0 mlxlogscore=999 spamscore=0 bulkscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108170097 X-Proofpoint-ORIG-GUID: JwZA6U40wCJHCc8UIX3u-7rlRP8sztpW X-Proofpoint-GUID: JwZA6U40wCJHCc8UIX3u-7rlRP8sztpW Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Liam R. Howlett" Signed-off-by: Liam R. Howlett --- arch/xtensa/kernel/syscall.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c index 201356faa7e6..118fe0ca7594 100644 --- a/arch/xtensa/kernel/syscall.c +++ b/arch/xtensa/kernel/syscall.c @@ -58,6 +58,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, u= nsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { struct vm_area_struct *vmm; + MA_STATE(mas, &mm->mm_mt, addr, addr); =20 if (flags & MAP_FIXED) { /* We do not accept a shared mapping if it would violate @@ -79,7 +80,8 @@ unsigned long arch_get_unmapped_area(struct file *filp, u= nsigned long addr, else addr =3D PAGE_ALIGN(addr); =20 - for (vmm =3D find_vma(current->mm, addr); ; vmm =3D vmm->vm_next) { + /* Must hold mm_mt lock */ + mas_for_each(&mas, vmm, ULONG_MAX) { /* At this point: (!vmm || addr < vmm->vm_end). */ if (TASK_SIZE - len < addr) return -ENOMEM; --=20 2.30.2