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McKenney" , Matthew Wilcox , Laurent Dufour , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka , Rik van Riel , Peter Zijlstra , Michel Lespinasse , Jerome Glisse , Minchan Kim , Joel Fernandes , Rom Lemarchand , Liam Howlett Subject: [PATCH v4 15/66] mm: Convert vma_lookup() to use the Maple Tree Thread-Topic: [PATCH v4 15/66] mm: Convert vma_lookup() to use the Maple Tree Thread-Index: AQHX5r/pa/3zIKn30USZuCbXNikPEA== Date: Wed, 1 Dec 2021 14:29:55 +0000 Message-ID: <20211201142918.921493-16-Liam.Howlett@oracle.com> References: <20211201142918.921493-1-Liam.Howlett@oracle.com> In-Reply-To: <20211201142918.921493-1-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 x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: f6e84d2e-28f1-4b8e-89fa-08d9b4d70bf1 x-ms-traffictypediagnostic: SN6PR10MB2768: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:2043; 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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: SN6PR10MB3022.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: f6e84d2e-28f1-4b8e-89fa-08d9b4d70bf1 X-MS-Exchange-CrossTenant-originalarrivaltime: 01 Dec 2021 14:29:55.9953 (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: ZF4BQbC53/Peca+TJ+XBZrMNwENCLuk0UIxeQP3XTDMX12Dt/VAeguaDWoJUY4aV9vJ5O1n2EThYGXNo+AtFiQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR10MB2768 X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10184 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 malwarescore=0 mlxscore=0 suspectscore=0 mlxlogscore=999 spamscore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2112010081 X-Proofpoint-ORIG-GUID: aeWkCtuyAcigBBU0FRwIaOo57-endqkc X-Proofpoint-GUID: aeWkCtuyAcigBBU0FRwIaOo57-endqkc Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Matthew Wilcox (Oracle)" Unlike the rbtree, the Maple Tree will return a NULL if there's nothing at a particular address. Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Liam R. Howlett --- include/linux/mm.h | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 4d5ab70b1f6d..c28bd97a4ecd 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2845,12 +2845,7 @@ struct vm_area_struct *find_vma_intersection(struct = mm_struct *mm, static inline struct vm_area_struct *vma_lookup(struct mm_struct *mm, unsigned long addr= ) { - struct vm_area_struct *vma =3D find_vma(mm, addr); - - if (vma && addr < vma->vm_start) - vma =3D NULL; - - return vma; + return mtree_load(&mm->mm_mt, addr); } =20 static inline unsigned long vm_start_gap(struct vm_area_struct *vma) --=20 2.30.2