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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: d4b7b220-0c04-4a34-2935-08da2d6b591c X-MS-Exchange-CrossTenant-originalarrivaltime: 04 May 2022 01:13:50.4864 (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: kvbm6WMTO/EuMiqTKBKVf/JUhRn4cIoJYZHMHEuTP1PWQHLPPRV3bdPd1BdLfkOaUaLebJ3ZRuOygUSlTH9dUA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR10MB5830 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.486,18.0.858 definitions=2022-05-03_10:2022-05-02,2022-05-03 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 bulkscore=0 spamscore=0 malwarescore=0 adultscore=0 suspectscore=0 mlxscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2205040006 X-Proofpoint-GUID: XkEAs-dySM-Tyt-uhmvvAnuI07FdoS5T X-Proofpoint-ORIG-GUID: XkEAs-dySM-Tyt-uhmvvAnuI07FdoS5T Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Liam R. Howlett" vma_lookup() walks the VMA tree for a specific value, find_vma() will search the tree after walking to a specific value. It is more efficient to only walk to the requested value since privcmd_ioctl_mmap() will exit the loop if vm_start !=3D msg->va. Signed-off-by: Liam R. Howlett Acked-by: Vlastimil Babka --- drivers/xen/privcmd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c index 3369734108af..ad17166b0ef6 100644 --- a/drivers/xen/privcmd.c +++ b/drivers/xen/privcmd.c @@ -282,7 +282,7 @@ static long privcmd_ioctl_mmap(struct file *file, void = __user *udata) struct page, lru); struct privcmd_mmap_entry *msg =3D page_address(page); =20 - vma =3D find_vma(mm, msg->va); + vma =3D vma_lookup(mm, msg->va); rc =3D -EINVAL; =20 if (!vma || (msg->va !=3D vma->vm_start) || vma->vm_private_data) --=20 2.35.1