[PATCH v2 4/6] mm: memory: make numa_migrate_prep() to take a folio

[Kefeng Wang <wangkefeng.wang@huawei.com>]

In preparation for large folio numa balancing, make numa_migrate_prep()
to take a folio, no functional change intended.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
 mm/huge_memory.c | 2 +-
 mm/internal.h    | 2 +-
 mm/memory.c      | 9 ++++-----
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 53472e34a761..0f93a73115f7 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1556,7 +1556,7 @@ vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf)
 	 */
 	if (node_is_toptier(nid))
 		last_cpupid = page_cpupid_last(&folio->page);
-	target_nid = numa_migrate_prep(&folio->page, vma, haddr, nid, &flags);
+	target_nid = numa_migrate_prep(folio, vma, haddr, nid, &flags);
 	if (target_nid == NUMA_NO_NODE) {
 		folio_put(folio);
 		goto out_map;
diff --git a/mm/internal.h b/mm/internal.h
index 7a961d12b088..d7916f1e9e98 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -984,7 +984,7 @@ void vunmap_range_noflush(unsigned long start, unsigned long end);
 
 void __vunmap_range_noflush(unsigned long start, unsigned long end);
 
-int numa_migrate_prep(struct page *page, struct vm_area_struct *vma,
+int numa_migrate_prep(struct folio *folio, struct vm_area_struct *vma,
 		      unsigned long addr, int page_nid, int *flags);
 
 void free_zone_device_page(struct page *page);
diff --git a/mm/memory.c b/mm/memory.c
index a05cfb6be36d..93ce8bcbe9d7 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4727,10 +4727,10 @@ static vm_fault_t do_fault(struct vm_fault *vmf)
 	return ret;
 }
 
-int numa_migrate_prep(struct page *page, struct vm_area_struct *vma,
+int numa_migrate_prep(struct folio *folio, struct vm_area_struct *vma,
 		      unsigned long addr, int page_nid, int *flags)
 {
-	get_page(page);
+	folio_get(folio);
 
 	/* Record the current PID acceesing VMA */
 	vma_set_access_pid_bit(vma);
@@ -4741,7 +4741,7 @@ int numa_migrate_prep(struct page *page, struct vm_area_struct *vma,
 		*flags |= TNF_FAULT_LOCAL;
 	}
 
-	return mpol_misplaced(page, vma, addr);
+	return mpol_misplaced(&folio->page, vma, addr);
 }
 
 static vm_fault_t do_numa_page(struct vm_fault *vmf)
@@ -4815,8 +4815,7 @@ static vm_fault_t do_numa_page(struct vm_fault *vmf)
 		last_cpupid = (-1 & LAST_CPUPID_MASK);
 	else
 		last_cpupid = page_cpupid_last(&folio->page);
-	target_nid = numa_migrate_prep(&folio->page, vma, vmf->address, nid,
-				       &flags);
+	target_nid = numa_migrate_prep(folio, vma, vmf->address, nid, &flags);
 	if (target_nid == NUMA_NO_NODE) {
 		folio_put(folio);
 		goto out_map;
-- 
2.27.0