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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: 8cf19776-1d9e-4cd3-85e4-08da27967ab7 X-MS-Exchange-CrossTenant-originalarrivaltime: 26 Apr 2022 15:06:45.7550 (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: JhVqjSpcVXgtFHfigu9tUqkjYL1g+3dvRxINjr4Oc2lSNckEQS04CQYmIRItxVx+K2P1qsDdAp06E2aVZrpJCw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR10MB2929 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.486,18.0.858 definitions=2022-04-26_04:2022-04-26,2022-04-26 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 spamscore=0 adultscore=0 mlxscore=0 bulkscore=0 suspectscore=0 malwarescore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2204260096 X-Proofpoint-GUID: mwRo29COK5RbsU3iHAOFPiyHHHaW8DCt X-Proofpoint-ORIG-GUID: mwRo29COK5RbsU3iHAOFPiyHHHaW8DCt Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Matthew Wilcox (Oracle)" The VMA iterator is faster than the linked list and removing the linked list will shrink the vm_area_struct. Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Liam R. Howlett Acked-by: Vlastimil Babka --- kernel/events/core.c | 3 ++- kernel/events/uprobes.c | 9 ++++++--- 2 files changed, 8 insertions(+), 4 deletions(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index 23bb19716ad3..b20b14d8dba7 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -10211,8 +10211,9 @@ static void perf_addr_filter_apply(struct perf_addr= _filter *filter, struct perf_addr_filter_range *fr) { struct vm_area_struct *vma; + VMA_ITERATOR(vmi, mm, 0); =20 - for (vma =3D mm->mmap; vma; vma =3D vma->vm_next) { + for_each_vma(vmi, vma) { if (!vma->vm_file) continue; =20 diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 4ef5385815d3..c3b2f695cc74 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -349,9 +349,10 @@ static bool valid_ref_ctr_vma(struct uprobe *uprobe, static struct vm_area_struct * find_ref_ctr_vma(struct uprobe *uprobe, struct mm_struct *mm) { + VMA_ITERATOR(vmi, mm, 0); struct vm_area_struct *tmp; =20 - for (tmp =3D mm->mmap; tmp; tmp =3D tmp->vm_next) + for_each_vma(vmi, tmp) if (valid_ref_ctr_vma(uprobe, tmp)) return tmp; =20 @@ -1230,11 +1231,12 @@ int uprobe_apply(struct inode *inode, loff_t offset= , =20 static int unapply_uprobe(struct uprobe *uprobe, struct mm_struct *mm) { + VMA_ITERATOR(vmi, mm, 0); struct vm_area_struct *vma; int err =3D 0; =20 mmap_read_lock(mm); - for (vma =3D mm->mmap; vma; vma =3D vma->vm_next) { + for_each_vma(vmi, vma) { unsigned long vaddr; loff_t offset; =20 @@ -1982,9 +1984,10 @@ bool uprobe_deny_signal(void) =20 static void mmf_recalc_uprobes(struct mm_struct *mm) { + VMA_ITERATOR(vmi, mm, 0); struct vm_area_struct *vma; =20 - for (vma =3D mm->mmap; vma; vma =3D vma->vm_next) { + for_each_vma(vmi, vma) { if (!valid_vma(vma, false)) continue; /* --=20 2.35.1