mm/zone_device: rename page_free callback to folio_free

Change page_free to folio_free to make the folio support for
zone device-private more consistent. The PCI P2PDMA callback
has also been updated and changed to folio_free() as a result.

For drivers that do not support folios (yet), the folio is
converted back into page via &folio->page and the page is used
as is, in the current callback implementation.

Link: https://lkml.kernel.org/r/20251001065707.920170-3-balbirs@nvidia.com
Signed-off-by: Balbir Singh <balbirs@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: Ying Huang <ying.huang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: David Airlie <airlied@gmail.com>
Cc: Simona Vetter <simona@ffwll.ch>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mika Penttilä <mpenttil@redhat.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Francois Dugast <francois.dugast@intel.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/test_hmm.c b/lib/test_hmm.c
index 24d82121cde8..9dbf265d1036 100644
--- a/lib/test_hmm.c
+++ b/lib/test_hmm.c
@@ -1374,8 +1374,9 @@ static const struct file_operations dmirror_fops = {
 	.owner		= THIS_MODULE,
 };
 
-static void dmirror_devmem_free(struct page *page)
+static void dmirror_devmem_free(struct folio *folio)
 {
+	struct page *page = &folio->page;
 	struct page *rpage = BACKING_PAGE(page);
 	struct dmirror_device *mdevice;
 
@@ -1438,7 +1439,7 @@ static vm_fault_t dmirror_devmem_fault(struct vm_fault *vmf)
 }
 
 static const struct dev_pagemap_ops dmirror_devmem_ops = {
-	.page_free	= dmirror_devmem_free,
+	.folio_free	= dmirror_devmem_free,
 	.migrate_to_ram	= dmirror_devmem_fault,
 };