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Tue, 17 Aug 2021 15:47:19 +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 24/61] arch/arm64: Remove mmap linked list from vdso. Thread-Topic: [PATCH v2 24/61] arch/arm64: Remove mmap linked list from vdso. 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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: 5f7b4451-c764-476d-76e4-08d961964bcb X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Aug 2021 15:47:19.3662 (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: n3+l2HgcgBwGVQnGzv7ZSLynVVmbNzupMnLyI+4yEyTe+J/qlT/kA53N/mxt5UF1Q8JsenGLzOeLddV8dCT+Nw== 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 malwarescore=0 adultscore=0 bulkscore=0 suspectscore=0 mlxlogscore=999 phishscore=0 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108170097 X-Proofpoint-GUID: De3h7Puxl3xhV9R1C7Mxnbkpj8qNJtDq X-Proofpoint-ORIG-GUID: De3h7Puxl3xhV9R1C7Mxnbkpj8qNJtDq Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Liam R. Howlett" Start using the maple tree Signed-off-by: Liam R. Howlett --- arch/arm64/kernel/vdso.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index a61fc4f989b3..57ea81fbe04b 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -136,10 +136,12 @@ int vdso_join_timens(struct task_struct *task, struct= time_namespace *ns) { struct mm_struct *mm =3D task->mm; struct vm_area_struct *vma; + MA_STATE(mas, &mm->mm_mt, 0, 0); =20 mmap_read_lock(mm); =20 - for (vma =3D mm->mmap; vma; vma =3D vma->vm_next) { + rcu_read_lock(); + mas_for_each(&mas, vma, ULONG_MAX) { unsigned long size =3D vma->vm_end - vma->vm_start; =20 if (vma_is_special_mapping(vma, vdso_info[VDSO_ABI_AA64].dm)) @@ -149,6 +151,7 @@ int vdso_join_timens(struct task_struct *task, struct t= ime_namespace *ns) zap_page_range(vma, vma->vm_start, size); #endif } + rcu_read_unlock(); =20 mmap_read_unlock(mm); return 0; --=20 2.30.2