[RFC PATCH 4/9] mm/rmap: add args in rmap_walk_control done hook

[Huan Yang]

In the done hook that determines whether rmap_walk can terminate the
traversal early, we may need to read parameters from rmap_walk_control
to assist in this decision.

This patch adds the rmap_walk_control as a parameter to the done hook.

Signed-off-by: Huan Yang <link@xxxxxxxx>
---
 include/linux/rmap.h | 2 +-
 mm/ksm.c             | 2 +-
 mm/rmap.c            | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index f0d17c971a20..a305811d6310 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -1013,7 +1013,7 @@ struct rmap_walk_control {
 	 */
 	bool (*rmap_one)(struct folio *folio, struct vm_area_struct *vma,
 					unsigned long addr, void *arg);
-	int (*done)(struct folio *folio);
+	int (*done)(struct folio *folio, struct rmap_walk_control *rwc);
 	struct anon_vma *(*anon_lock)(const struct folio *folio,
 				      struct rmap_walk_control *rwc);
 	bool (*invalid_vma)(struct vm_area_struct *vma, void *arg);
diff --git a/mm/ksm.c b/mm/ksm.c
index ef73b25fd65a..635fe402af91 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -3072,7 +3072,7 @@ void rmap_walk_ksm(struct folio *folio, struct rmap_walk_control *rwc)
 				anon_vma_unlock_read(anon_vma);
 				return;
 			}
-			if (rwc->done && rwc->done(folio)) {
+			if (rwc->done && rwc->done(folio, rwc)) {
 				anon_vma_unlock_read(anon_vma);
 				return;
 			}
diff --git a/mm/rmap.c b/mm/rmap.c
index bae9f79c7dc9..e590f4071eca 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -2232,7 +2232,7 @@ static bool invalid_migration_vma(struct vm_area_struct *vma, void *arg)
 	return vma_is_temporary_stack(vma);
 }
 
-static int folio_not_mapped(struct folio *folio)
+static int folio_not_mapped(struct folio *folio, struct rmap_walk_control *rwc)
 {
 	return !folio_mapped(folio);
 }
@@ -2828,7 +2828,7 @@ static void rmap_walk_anon(struct folio *folio, struct rmap_walk_control *rwc)
 
 		if (!rwc->rmap_one(folio, vma, address, rwc->arg))
 			break;
-		if (rwc->done && rwc->done(folio))
+		if (rwc->done && rwc->done(folio, rwc))
 			break;
 	}
 
@@ -2891,7 +2891,7 @@ static void __rmap_walk_file(struct folio *folio, struct address_space *mapping,
 
 		if (!rwc->rmap_one(folio, vma, address, rwc->arg))
 			goto done;
-		if (rwc->done && rwc->done(folio))
+		if (rwc->done && rwc->done(folio, rwc))
 			goto done;
 	}
 done:
-- 
2.34.1