Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Liam Howlett <liam.howlett@oracle.com>
To:     "maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        "damon @ lists . linux . dev" <damon@lists.linux.dev>,
        SeongJae Park <sj@kernel.org>,
        David Hildenbrand <david@redhat.com>
Subject: [PATCH v10 26/69] mm: convert vma_lookup() to use mtree_load()
Thread-Topic: [PATCH v10 26/69] mm: convert vma_lookup() to use mtree_load()
Thread-Index: AQHYhbANxSE1TW84RU+pSInS/Ep6HA==
Date:   Tue, 21 Jun 2022 20:46:59 +0000
Message-ID: <20220621204632.3370049-27-Liam.Howlett@oracle.com>
References: <20220621204632.3370049-1-Liam.Howlett@oracle.com>
In-Reply-To: <20220621204632.3370049-1-Liam.Howlett@oracle.com>
Accept-Language: en-US
Content-Language: en-US
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: =?iso-8859-1?Q?UXt+UneDuNQ+U92AGHK/lO/iBzyYEr/3AUWYjKQHOlW5ApjAp3w4StSkIb?=
 =?iso-8859-1?Q?rUDd4BRGexR9uLm2Svj5ey9HHu19C9LoBoonODx5yI2yBGyO4XFwAMeZxN?=
 =?iso-8859-1?Q?/JLOjRIrkCSwp1bWyb8SAv7XTWfNt+tN7ACpf2N7kwBHuufxASNkXgZSxc?=
 =?iso-8859-1?Q?7R+19KwsCQ8YRWAvnSGzLagVUOX+i+g+GcjuahKjWPoE3eRsA+HfIex+0O?=
 =?iso-8859-1?Q?4KtOPH+3g+ls+jTeyZhwjx44Zq4ailJB4UTOTeo35newMp9mh2A/ims3Xr?=
 =?iso-8859-1?Q?V9dOmb8/Ac5+4alg/zc9hiuT9EIUnx5+tOquK1CsB3vmk/qKE9iMgD6yyh?=
 =?iso-8859-1?Q?Gh0/32ZJ+cQ3Yo2wAg9deVz6IPbH2mIsPVCH4bFjL/GSehtXwYzImvfk65?=
 =?iso-8859-1?Q?ol/YsbM/5Sbnld0J2cNscjAYfWNkV3/ABiEu8KqbkH+qrpItPnt+wp9I77?=
 =?iso-8859-1?Q?ZCDSdsq82T5tb41IANNPfQ5yYaFNpdtazdIoKhy1WZixcvYTU0Vfdo8C+W?=
 =?iso-8859-1?Q?u2bIl0kcHOmPd50L2rCwtV/9OlT4KwgajDKUiDFt6yov1YKVPUb5OzeVUZ?=
 =?iso-8859-1?Q?v3a5MSBBlFzxwfn6fAtIjoavWfvpRdUlO9oicA1RVbG3meE8EpN+V3SGs7?=
 =?iso-8859-1?Q?YmyohM3Ngew2dr124hcJUnokUqk1KGpHeIksGdiCUtjsfLhXUAdF3mAFXz?=
 =?iso-8859-1?Q?3ZM/tEIpQoJ32MBYzgPDzRx3GV3/lqZbreHKqbuYIK0Cn+THnZi2JtOVXB?=
 =?iso-8859-1?Q?AGc/l56uyDoLsI8GiLPGLP1g1vEesNxeLYP3nhY5wiOPLOB1ZD0lRI14VR?=
 =?iso-8859-1?Q?bxBxDlOgXDFYbdgO/O5LvoiOlrTaaeWu3oCaOGBKn/eYJJb4jiWoMhA8HG?=
 =?iso-8859-1?Q?o5SFZiS5BCRrpKNjaulpXg4OAekB1qXolVO1fhIkYlzLhHjbxbdx3oshnG?=
 =?iso-8859-1?Q?xyiNYmqMC/kp1LT5ZgU1nAYBBIsHIh2b6Tor3zdz2Msjl9qeM21nVhm7hU?=
 =?iso-8859-1?Q?A5aqkDSHjgLlYg7UP/SX1qpet8qQ2xpfTPqkd+JX29hxAUZgycKW+3ynAP?=
 =?iso-8859-1?Q?jIKSZ2R4cSnXxyP2CYwa3ffd9PNkM3nvfh2Mbee8AhuFmrt/qzd8nM37tb?=
 =?iso-8859-1?Q?OI70FGGYOm6HIq8tnJLEu9+WNPPMB2w7tLvsM+lz4BYF1GAzJFhGUa08T8?=
 =?iso-8859-1?Q?Daa8FYRp9gRUi8L2LZSlwfYu+vl977xLqbriUf9wwnAxeA+Kc9PaEqdU6i?=
 =?iso-8859-1?Q?8CNR+uUqb+D+T8lYNA/uF0NU4D+O0DO6Ah9R/05EwLANMNZiYGOZmwljZk?=
 =?iso-8859-1?Q?/rB32nDeBo8AMQuBXawePbc7c4J66g1qHXQ6YcksY+Ng49iW+nSjFXaXRu?=
 =?iso-8859-1?Q?wzsOmvi+SfwDclIbkyLXZjzOkHBCqx2QNY+Vvn9YzqygCb9HGbp4kcx+h9?=
 =?iso-8859-1?Q?np5Tct/ZbvFc1jYb2fJ0AxIXvR3Z4BHrziJKeAy8FTaKH23wMpcrMFcZDI?=
 =?iso-8859-1?Q?9I6VyPuwIf3WgOXLWavn841Nn0yH5VJ+FfMVSyIXPKwe66wb87kH4FZWHY?=
 =?iso-8859-1?Q?16pS6NrTLz1WQkc2vQjTVBiI4J3EveIo3gMKdQzfUdFKBeyzrZ6YcyI8x+?=
 =?iso-8859-1?Q?03jIjayQ5Xg3qbfo64t1WmS++w+DjbUrr4WmxgVrwzKDSDasor5TkbkUIr?=
 =?iso-8859-1?Q?43CtDOcvGbbS4Aj85YryZ8yyIPNqRCaYCOm3mG0Cb8LY5Ig4sJuusV4WLh?=
 =?iso-8859-1?Q?pguMfIcQkitZKB31TxVeg4qu4JWjU21sMxN+TsTdYim8DvY8Wir0smOOCe?=
 =?iso-8859-1?Q?gtOzxE4nZ4Y9+TdBzNWf09msz+wPbng=3D?=
Content-Type: text/plain; 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: a233648c-cae9-4716-ce4f-08da53c73736
X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Jun 2022 20:46:59.6290
 (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: 4tl664p+SNR4k6eZQoWk2wiJZkx9RTiMHxK8GZN8Q4mzCKtP8lHJHhxKLMdQvBAKw9XX7LkrEvStvmF5+Xow2w==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR10MB3085
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.517,18.0.883
 definitions=2022-06-21_09:2022-06-21,2022-06-21 signatures=0
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 malwarescore=0 mlxscore=0
 phishscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 bulkscore=0
 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2204290000
 definitions=main-2206210087
X-Proofpoint-ORIG-GUID: F68_5PxoM3jBY-0zcAug1Yz7gMG0Dq7C
X-Proofpoint-GUID: F68_5PxoM3jBY-0zcAug1Yz7gMG0Dq7C
X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,
        RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE
        autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

Unlike the rbtree, the Maple Tree will return a NULL if there's nothing at
a particular address.

Since the previous commit dropped the vmacache, it is now possible to
consult the tree directly.

Link: https://lkml.kernel.org/r/20220504011345.662299-11-Liam.Howlett@oracl=
e.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 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 b0a84f7c79fe..1b02988b6fc8 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2808,12 +2808,7 @@ 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
2.35.1