diff mbox series

[4/5] mm: migrate: remove migrate_folio_extra()

Message ID 20240524052843.182275-5-wangkefeng.wang@huawei.com (mailing list archive)
State New
Headers show
Series mm: cleanup MIGRATE_SYNC_NO_COPY mode | expand

Commit Message

Kefeng Wang May 24, 2024, 5:28 a.m. UTC 
The migrate_folio_extra() only called in migrate.c now, convert it
a static function and take a new src_private argument which could
be shared by migrate_folio() and filemap_migrate_folio() to simplify
code a bit.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
 include/linux/migrate.h |  2 --
 mm/migrate.c            | 33 +++++++++++----------------------
 2 files changed, 11 insertions(+), 24 deletions(-)

Comments

Jane Chu June 7, 2024, 8:38 p.m. UTC | #1 
On 5/23/2024 10:28 PM, Kefeng Wang wrote:

> The migrate_folio_extra() only called in migrate.c now, convert it
> a static function and take a new src_private argument which could
> be shared by migrate_folio() and filemap_migrate_folio() to simplify
> code a bit.
>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
> ---
>   include/linux/migrate.h |  2 --
>   mm/migrate.c            | 33 +++++++++++----------------------
>   2 files changed, 11 insertions(+), 24 deletions(-)
>
> diff --git a/include/linux/migrate.h b/include/linux/migrate.h
> index 2ce13e8a309b..517f70b70620 100644
> --- a/include/linux/migrate.h
> +++ b/include/linux/migrate.h
> @@ -63,8 +63,6 @@ extern const char *migrate_reason_names[MR_TYPES];
>   #ifdef CONFIG_MIGRATION
>   
>   void putback_movable_pages(struct list_head *l);
> -int migrate_folio_extra(struct address_space *mapping, struct folio *dst,
> -		struct folio *src, enum migrate_mode mode, int extra_count);
>   int migrate_folio(struct address_space *mapping, struct folio *dst,
>   		struct folio *src, enum migrate_mode mode);
>   int migrate_pages(struct list_head *l, new_folio_t new, free_folio_t free,
> diff --git a/mm/migrate.c b/mm/migrate.c
> index 159f737501e1..1d1cb832fdb4 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -658,18 +658,19 @@ EXPORT_SYMBOL(folio_migrate_copy);
>    *                    Migration functions
>    ***********************************************************/
>   
> -int migrate_folio_extra(struct address_space *mapping, struct folio *dst,
> -		struct folio *src, enum migrate_mode mode, int extra_count)
> +static int __migrate_folio(struct address_space *mapping, struct folio *dst,
> +			   struct folio *src, void *src_private,
> +			   enum migrate_mode mode)
>   {
>   	int rc;
>   
> -	BUG_ON(folio_test_writeback(src));	/* Writeback must be complete */
> -
> -	rc = folio_migrate_mapping(mapping, dst, src, extra_count);
> -
> +	rc = folio_migrate_mapping(mapping, dst, src, 0);
>   	if (rc != MIGRATEPAGE_SUCCESS)
>   		return rc;
>   
> +	if (src_private)
> +		folio_attach_private(dst, folio_detach_private(src));
> +
>   	if (mode != MIGRATE_SYNC_NO_COPY)
>   		folio_migrate_copy(dst, src);
>   	else
> @@ -690,9 +691,10 @@ int migrate_folio_extra(struct address_space *mapping, struct folio *dst,
>    * Folios are locked upon entry and exit.
>    */
>   int migrate_folio(struct address_space *mapping, struct folio *dst,
> -		struct folio *src, enum migrate_mode mode)
> +		  struct folio *src, enum migrate_mode mode)
>   {
> -	return migrate_folio_extra(mapping, dst, src, mode, 0);
> +	BUG_ON(folio_test_writeback(src));	/* Writeback must be complete */
> +	return __migrate_folio(mapping, dst, src, NULL, mode);
>   }
>   EXPORT_SYMBOL(migrate_folio);
>   
> @@ -846,20 +848,7 @@ EXPORT_SYMBOL_GPL(buffer_migrate_folio_norefs);
>   int filemap_migrate_folio(struct address_space *mapping,
>   		struct folio *dst, struct folio *src, enum migrate_mode mode)
>   {
> -	int ret;
> -
> -	ret = folio_migrate_mapping(mapping, dst, src, 0);
> -	if (ret != MIGRATEPAGE_SUCCESS)
> -		return ret;
> -
> -	if (folio_get_private(src))
> -		folio_attach_private(dst, folio_detach_private(src));
> -
> -	if (mode != MIGRATE_SYNC_NO_COPY)
> -		folio_migrate_copy(dst, src);
> -	else
> -		folio_migrate_flags(dst, src);
> -	return MIGRATEPAGE_SUCCESS;
> +	return __migrate_folio(mapping, dst, src, folio_get_private(src), mode);
>   }
>   EXPORT_SYMBOL_GPL(filemap_migrate_folio);
>   

Looks good.

Reviewed-by: Jane Chu <jane.chu@oracle.com>

-jane
diff mbox series

Patch

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 2ce13e8a309b..517f70b70620 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -63,8 +63,6 @@  extern const char *migrate_reason_names[MR_TYPES];
 #ifdef CONFIG_MIGRATION
 
 void putback_movable_pages(struct list_head *l);
-int migrate_folio_extra(struct address_space *mapping, struct folio *dst,
-		struct folio *src, enum migrate_mode mode, int extra_count);
 int migrate_folio(struct address_space *mapping, struct folio *dst,
 		struct folio *src, enum migrate_mode mode);
 int migrate_pages(struct list_head *l, new_folio_t new, free_folio_t free,
diff --git a/mm/migrate.c b/mm/migrate.c
index 159f737501e1..1d1cb832fdb4 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -658,18 +658,19 @@  EXPORT_SYMBOL(folio_migrate_copy);
  *                    Migration functions
  ***********************************************************/
 
-int migrate_folio_extra(struct address_space *mapping, struct folio *dst,
-		struct folio *src, enum migrate_mode mode, int extra_count)
+static int __migrate_folio(struct address_space *mapping, struct folio *dst,
+			   struct folio *src, void *src_private,
+			   enum migrate_mode mode)
 {
 	int rc;
 
-	BUG_ON(folio_test_writeback(src));	/* Writeback must be complete */
-
-	rc = folio_migrate_mapping(mapping, dst, src, extra_count);
-
+	rc = folio_migrate_mapping(mapping, dst, src, 0);
 	if (rc != MIGRATEPAGE_SUCCESS)
 		return rc;
 
+	if (src_private)
+		folio_attach_private(dst, folio_detach_private(src));
+
 	if (mode != MIGRATE_SYNC_NO_COPY)
 		folio_migrate_copy(dst, src);
 	else
@@ -690,9 +691,10 @@  int migrate_folio_extra(struct address_space *mapping, struct folio *dst,
  * Folios are locked upon entry and exit.
  */
 int migrate_folio(struct address_space *mapping, struct folio *dst,
-		struct folio *src, enum migrate_mode mode)
+		  struct folio *src, enum migrate_mode mode)
 {
-	return migrate_folio_extra(mapping, dst, src, mode, 0);
+	BUG_ON(folio_test_writeback(src));	/* Writeback must be complete */
+	return __migrate_folio(mapping, dst, src, NULL, mode);
 }
 EXPORT_SYMBOL(migrate_folio);
 
@@ -846,20 +848,7 @@  EXPORT_SYMBOL_GPL(buffer_migrate_folio_norefs);
 int filemap_migrate_folio(struct address_space *mapping,
 		struct folio *dst, struct folio *src, enum migrate_mode mode)
 {
-	int ret;
-
-	ret = folio_migrate_mapping(mapping, dst, src, 0);
-	if (ret != MIGRATEPAGE_SUCCESS)
-		return ret;
-
-	if (folio_get_private(src))
-		folio_attach_private(dst, folio_detach_private(src));
-
-	if (mode != MIGRATE_SYNC_NO_COPY)
-		folio_migrate_copy(dst, src);
-	else
-		folio_migrate_flags(dst, src);
-	return MIGRATEPAGE_SUCCESS;
+	return __migrate_folio(mapping, dst, src, folio_get_private(src), mode);
 }
 EXPORT_SYMBOL_GPL(filemap_migrate_folio);