Received-SPF: pass (google.com: domain of linux-kernel+bounces-69349-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
From: Sidhartha Kumar <sidhartha.kumar@oracle.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Cc: akpm@linux-foundation.org, willy@infradead.org, apopple@nvidia.com,
        Sidhartha Kumar <sidhartha.kumar@oracle.com>
Subject: [PATCH v2 1/6] mm/migrate: introduce migrate_pfn_to_folio()
Date: Fri, 16 Feb 2024 13:13:15 -0800
Message-ID: <20240216211320.222431-1-sidhartha.kumar@oracle.com>
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
Precedence: bulk
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: 
	=?us-ascii?Q?yyQRW4+qY55BFFmk4+/Fj/vbJ+YQpKymLdLmICXi42QbMDH2c0siJRYnYw/H?=
 =?us-ascii?Q?8X2NOCv0h/Em5SpJ7ysKAqMYZh1eUaK/wgPKeP43xcVjdgjCvwxDEkNTngFZ?=
 =?us-ascii?Q?mezel1rIY/9bhNzQWM/d85mKbiRwfgVBUc3ZNmJGBryTnzhvjpbhgs4ou4C/?=
 =?us-ascii?Q?4H4YGqjslT/szi14v5YYTtK0vGQQjKyAint2+/tR+yop4PHHkSdigMyLungt?=
 =?us-ascii?Q?VAgaqh+MkV608Zo7cjQu2YLhQ53FuSdqw79BA37ZfgJicySmGq3uT71+rDD0?=
 =?us-ascii?Q?KXX96l/4nGEjrNHCRLtvfl9WfXq5K8ZUDDmEGcbmvvty6PjnSBZ3yI3ZzxLl?=
 =?us-ascii?Q?D7gVUvHKjGcNrb55nmZ0NafYNrTrD2p9SOc954K3ppCHILpmtmcZfxyjCRc0?=
 =?us-ascii?Q?nhD0CnFsaggjaKdJcVlwuMTZy77m9B15/NC0GHls9z50U95aBJz9eP5BsWKM?=
 =?us-ascii?Q?6LmZLS9r4B8KqHjb/vY/oCosXd/9SaOHiKS1qaC1HP5+grCV2JO5N4RcfbKg?=
 =?us-ascii?Q?bUue6D3KJTaZzOLqP/iFG7dZsdOgzF68BQKoP9W5qLTOOPHZuYjq2ePBKR0J?=
 =?us-ascii?Q?Z3jFV417HyrajB8pBLFrjnTW70BdUj2kWMUT1bSR8ubYFRnu+pItDomv0WGf?=
 =?us-ascii?Q?hEKStBKZk6cSKrjd9EbnJAuFU3Fg0bmTkB7ae7AACTTqAKM71ZYuBAjIz2lZ?=
 =?us-ascii?Q?cQ7RsesUjEpxmHk43XMsSPp8JHSjurmtCwJI1UZSvQESgToIyrtTrFfqHkqm?=
 =?us-ascii?Q?PNWDCpmyyLWFpN9HdaQFDTrj0xjc4grjlD5SWdHCdO9t5zVQqRcrxmyH/dJ1?=
 =?us-ascii?Q?u0ZwI32MPEx3nPTN0DQ8oCAdvQgZQUnFDTLawBnGFVsvGrskA97U6noA3IxT?=
 =?us-ascii?Q?91T1I7fLQFSQkNWkNnXYAZIhdEEbreLGvthukcWfuNjcmSyqcATbFELUAljy?=
 =?us-ascii?Q?WxqR+HUGrBxUmMUDFSxnAP9UL1Nuk+khkB/bhxGRx8sp6hKFZ2/VqqF1vXgS?=
 =?us-ascii?Q?SHHv8C3YdyF3CaniD2fcuo9V8safhaJ8Fx/B2wHi+8xQaTcIDuqowsgFB0a1?=
 =?us-ascii?Q?ZLv4RVWZY5DFKbPICYISMH1uealKnGWJVKbMC/13e+US+AcdDmP4/KstI7Zl?=
 =?us-ascii?Q?/ASS40W3EUjHOOjc5xls//h6/Y1mP9bfYN664wBOiAdTCnMtl/go+/MtF7su?=
 =?us-ascii?Q?N50dN0YQkhhyPczo9ty/Df5233ObGHC0FkXSpzKxRXIQ9PPoSdGEtRdVMV+z?=
 =?us-ascii?Q?PXKrwf8sTqbX7RK7tnJSjH9lbDhKa96tuqZGrqWgeV/UMiGfsQ7uiMzQQcOc?=
 =?us-ascii?Q?eQGCqW19WMHSpZ4X6KGBH5JU1x+FIm8ThY7eKFNQD+3bWp6dKJvBcen/WrG0?=
 =?us-ascii?Q?4s6Hgvs6BmAZV1cqVhKy3ADKklYb21J6siL6osecSI5k2AOhLyzvTZUupc2D?=
 =?us-ascii?Q?hmq0bcRx52VudvavLdCF+a6KHREW+cPYCvd0tLK8ull3RxcjUxSp/femU+aB?=
 =?us-ascii?Q?eEm/BrKpvcAsB68B7NqT6B6m7E8ul0VQJLIpBwJA3LX844OtRnBm/17jjpnl?=
 =?us-ascii?Q?M+51V3tDb7OUQfRuW4Muwo6xb+9kNqxp6U1u9/8VEeI8Dpq6AevtiwupUTdK?=
 =?us-ascii?Q?BCo7+z7Vz/l53vi9UksRFPQ=3D?=
X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 
	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
X-OriginatorOrg: oracle.com
X-MS-Exchange-CrossTenant-Network-Message-Id: ef414004-76fd-4796-fa39-08dc2f341d64
X-MS-Exchange-CrossTenant-AuthSource: CH0PR10MB5113.namprd10.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Feb 2024 21:13:25.8969
 (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: iIbIZ33os2BlNkr5raEsKKDlFslu0k3/4Wv7jDs2+6sVaqJmSZ8PytEasRfKfiHpFHr9Av1DJoZiJ0u3U9DKudoQNvFm5Vh+xTOJKn7tIfE=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR10MB4909
X-Proofpoint-Virus-Version: vendor=baseguard
 engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26
 definitions=2024-02-16_20,2024-02-16_01,2023-05-22_02
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 spamscore=0
 mlxlogscore=999 bulkscore=0 phishscore=0 mlxscore=0 suspectscore=0
 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1
 engine=8.12.0-2311290000 definitions=main-2402160167
X-Proofpoint-ORIG-GUID: qgc8GBs-fDdfyB1N6LjrkrIiPkCHMymW
X-Proofpoint-GUID: qgc8GBs-fDdfyB1N6LjrkrIiPkCHMymW

Add a folio compatible wrapper for migrate_pfn_to_page() so we can
return a folio directly.

Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Suggested-by: Alistair Popple <apopple@nvidia.com>
---
 include/linux/migrate.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 2ce13e8a309bd..21a1a5e415338 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -171,6 +171,11 @@ static inline struct page *migrate_pfn_to_page(unsigned long mpfn)
 	return pfn_to_page(mpfn >> MIGRATE_PFN_SHIFT);
 }
 
+static inline struct folio *migrate_pfn_to_folio(unsigned long mpfn)
+{
+	return page_folio(migrate_pfn_to_page(mpfn));
+}
+
 static inline unsigned long migrate_pfn(unsigned long pfn)
 {
 	return (pfn << MIGRATE_PFN_SHIFT) | MIGRATE_PFN_VALID;
-- 
2.42.0