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;
Message-ID: <63365484-7035-f2bd-5317-2e95d65993f7@oracle.com>
Date:   Mon, 14 Mar 2022 19:37:03 -0400
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0)
 Gecko/20100101 Thunderbird/91.7.0
Subject: Re: [PATCH 1/2] xen/grant-table: remove gnttab_*transfer*() functions
Content-Language: en-US
To:     Juergen Gross <jgross@suse.com>, xen-devel@lists.xenproject.org,
        linux-kernel@vger.kernel.org
Cc:     Stefano Stabellini <sstabellini@kernel.org>
References: <20220311103429.12845-1-jgross@suse.com>
 <20220311103429.12845-2-jgross@suse.com>
From:   Boris Ostrovsky <boris.ostrovsky@oracle.com>
In-Reply-To: <20220311103429.12845-2-jgross@suse.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?cDM0bWw5MTVRaXVVVkN2TXVOMERud3kwQmdac3pVNmVOZHhpTU41aHYzNnZH?=
 =?utf-8?B?aW1MMEJYOWFCRUtqdU1wZXp2dnhGbHp5d0xmNFpkN1ExU21yZitrVk0rUjAz?=
 =?utf-8?B?T1lLdE52VWVsVjRCVUVjREE5MUxMLzlVaTFWd0h1M0FSTTJKVTZFTVoxeVNM?=
 =?utf-8?B?SGVScDZmWHJ4QmhWREFMMWlxeUI2ZksvS0lqa3BqTy84UzNQejZjRncvWFN0?=
 =?utf-8?B?OHNPYlNXQXVrNVI1YTBFTWJMdVZIRFpMTnAraTU3bnpuUEU4ajBuSjZoZGs3?=
 =?utf-8?B?QkJqNW5KSDI2WC9oaWgzQndqSnE3VGwxenduTktoS3BGUlpKdnRKSEdjbldl?=
 =?utf-8?B?dkthYmgvdHVOOVMvVndIVGxaQitMMnpyMHp6NVF3WUloSjZXcVNSZEZOcjZX?=
 =?utf-8?B?TUp1Q0ZYOUdqSFpkMGkxMlNjTkJabmZUUm53NlAyWXVBUHJ0VlZuNk1LUTFP?=
 =?utf-8?B?cGVCTHVEK0dNMXYxM1VGWEEyWUViYzRCK0c0MUR2OWx5c2RKbDFkTGVQQXNw?=
 =?utf-8?B?Z3R6a2FCWDRrUlQyZHFwNi9WbWFYYW1BS1hIanpsOE1FekVRenhJQ0NidWoy?=
 =?utf-8?B?MEUrcnR2OVIvbndmdWdxaHE2clo3Q25MektqbUxadHRyUm1ocURtS2JjQ3cz?=
 =?utf-8?B?cnVNNzk0czczSWVrbDRWZjE1b1lIZGE5OU01M2lUc055RVV5WjVXbzQ3YjZO?=
 =?utf-8?B?UCtPbnVQUkh0M0N1TXAxNjRlTTlsVFZsMUZ2WjBYNkRlNmdMd0QvWEtXVmgx?=
 =?utf-8?B?UW10Tkk3U1NCeFpvMnFKNy9KYStqU3A2MXhtMFF3N3RWMmY2dDdnWVZSQlNO?=
 =?utf-8?B?dUdQSityTmtsZll2UXFqQ1ROcVdYWkRyT2tUenlYQWNCZDZCNmY4d2R4NXpK?=
 =?utf-8?B?S1o2S0xlaTl4STVJQjlENkNodWxyMTdpWVlRQUNFaFlpUzB6T0xXMlNIVkZP?=
 =?utf-8?B?VmhYWkkzY3FReDFCellzcnNId01xK1NLZjZHSlREQ0N2T0g3ZmFITXRUaVVi?=
 =?utf-8?B?Q2pFYTBOeGZqOGdsSWhGdnI3d0VMKzFraEdmdUZpNmpBck9JMy9YSXB2K0J3?=
 =?utf-8?B?OVk0dVlRemZHOGE5Y2JMTXZPYWFJemd3SzhaaUdNcUcvRXFURDVGd21uN21i?=
 =?utf-8?B?UjgrcmdBaU9qM0plSHZaSGVNOEM2K3QvL1Y5VGYzSk00MXZKeUxZYkZiOWdY?=
 =?utf-8?B?Tmd6bFYzWjNaSytiVFU4UDNvZXJLSG9LaFJJYUpLNWpqZEdqMTgvMjY4dE5s?=
 =?utf-8?B?bTcxL3ExSm9PKzhSc3JSVFdLdWJyRWN0QU9oYWVNNGg5VEZaN1FsMlp4QVFv?=
 =?utf-8?B?ZGtMU3AvYmdlU0ZaS3lRdDNQTHJtL0ROeTlZWDdnOTVOWUZNRmxKc0ZHRkxC?=
 =?utf-8?B?eDJXNisyQTRoa2k4TmNqNW0wcWM0VjIwTVQ1eDM4cEFwRFlSK05oNmlHYVVt?=
 =?utf-8?B?d1dNWXNYRlVBYzZSVHVaWEdsSC9KMjBwMmRZQWowNE14R3NMQk1QNjJUbElP?=
 =?utf-8?B?Wlk2YTVCV01GVkk3U0NkdmMwaWlFVldSM0trY2ZoUWdWdGxSMXFVdUxrM21G?=
 =?utf-8?B?Nk9UYjZ6WTVHTyszeXBMVlJIcncycllhbDBqeVJWZGJKR09TNlVLSDlvYjhv?=
 =?utf-8?B?Y0FtNEhJaDVkV1g3aFBpV29lRy9oVWVpWU5FTldSaExoazhvZ1ExNDVpdzg5?=
 =?utf-8?B?QzNqa1cyQnRDT2VhTGhMLzVMMTl5Y2R4MS9yczBjTUd3WjB0WTRYblhSZitV?=
 =?utf-8?B?OGtaMXV2Ukh5MTZOOUgzREsxVERUSjAxNS9WLytyWnpVNU5UNVNyekxFT2FV?=
 =?utf-8?B?T0FmaVd4Wnh4MndzeU9ZNUNxQUFsOXk4UVF2OXdJRi9MMUJULzNEUWZ1VzMw?=
 =?utf-8?B?NGpITHI2clc2ajFTdkdpLzhiUnJMdFhvVnBEWWlZcEFFQXk4Y0MwTTNlK3pm?=
 =?utf-8?B?emRFWWFvd3NzYzFUeHJuQlpXVHdCL1E4V1k0dTYwanpTWTcwUlFHb0xnZkdS?=
 =?utf-8?B?cS9CaWVZeEt3PT0=?=
X-OriginatorOrg: oracle.com
X-MS-Exchange-CrossTenant-Network-Message-Id: c7254098-7673-4b3c-45ad-08da061390f7
X-MS-Exchange-CrossTenant-AuthSource: BLAPR10MB5009.namprd10.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Mar 2022 23:37:13.6365
 (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: NBNZ5ZKb8iV1nregaX1Jbt8hI11CBw/0/itvd6JcTKnUYZM69uAY2oIcR5IHhtj5qyXZBpIdzPt2bOoK7o1s7F4o5aH8g+QqNLZHY6KXInE=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR1001MB2336
X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10286 signatures=693139
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 spamscore=0
 malwarescore=0 adultscore=0 bulkscore=0 mlxscore=0 mlxlogscore=999
 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1
 engine=8.12.0-2202240000 definitions=main-2203140132
X-Proofpoint-ORIG-GUID: 3a9BGKFCgKYkn1Q9MJLdoUTO35UXNdXe
X-Proofpoint-GUID: 3a9BGKFCgKYkn1Q9MJLdoUTO35UXNdXe
X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,RCVD_IN_DNSWL_LOW,
        RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,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


On 3/11/22 5:34 AM, Juergen Gross wrote:
> All grant table operations related to the "transfer" functionality
> are unused currently. There have been users in the old days of the
> "Xen-o-Linux" kernel, but those didn't make it upstream.
>
> So remove the "transfer" related functions.


Do we need to assert somewhere that transfer flags are not set?


-boris