diff mbox series

[v2,3/9] mm/page_io: convert bio_first_page_all() to bio_first_folio_all()

Message ID 20230719095848.3422629-4-zhangpeng362@huawei.com (mailing list archive)
State New
Headers show
Series Convert several functions in page_io.c to use a folio | expand

Commit Message

Peng Zhang July 19, 2023, 9:58 a.m. UTC 
From: ZhangPeng <zhangpeng362@huawei.com>

Convert bio_first_page_all() to bio_first_folio_all() to return a
folio, which makes it easier to use.

Suggested-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
---
 Documentation/block/biovecs.rst  | 2 +-
 drivers/block/drbd/drbd_bitmap.c | 2 +-
 fs/f2fs/data.c                   | 2 +-
 include/linux/bio.h              | 4 ++--
 kernel/power/swap.c              | 2 +-
 mm/page_io.c                     | 4 ++--
 6 files changed, 8 insertions(+), 8 deletions(-)

Comments

Matthew Wilcox (Oracle) July 19, 2023, 2:17 p.m. UTC | #1 
On Wed, Jul 19, 2023 at 05:58:42PM +0800, Peng Zhang wrote:
> From: ZhangPeng <zhangpeng362@huawei.com>
> 
> Convert bio_first_page_all() to bio_first_folio_all() to return a
> folio, which makes it easier to use.

This wasn't what I was suggesting.  Indeed, this may introduce bugs.
I was suggesting adding bio_first_folio_all() so that it can be used
by code that knows this is what it wants.

> Suggested-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
> ---
>  Documentation/block/biovecs.rst  | 2 +-
>  drivers/block/drbd/drbd_bitmap.c | 2 +-
>  fs/f2fs/data.c                   | 2 +-
>  include/linux/bio.h              | 4 ++--
>  kernel/power/swap.c              | 2 +-
>  mm/page_io.c                     | 4 ++--
>  6 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/Documentation/block/biovecs.rst b/Documentation/block/biovecs.rst
> index ddb867e0185b..258f6faed333 100644
> --- a/Documentation/block/biovecs.rst
> +++ b/Documentation/block/biovecs.rst
> @@ -133,7 +133,7 @@ Usage of helpers:
>  	bio_for_each_segment_all()
>  	bio_for_each_bvec_all()
>  	bio_first_bvec_all()
> -	bio_first_page_all()
> +	bio_first_folio_all()
>  	bio_last_bvec_all()
>  
>  * The following helpers iterate over single-page segment. The passed 'struct
> diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
> index 85ca000a0564..ce1a07ba85ff 100644
> --- a/drivers/block/drbd/drbd_bitmap.c
> +++ b/drivers/block/drbd/drbd_bitmap.c
> @@ -939,7 +939,7 @@ static void drbd_bm_endio(struct bio *bio)
>  	struct drbd_bm_aio_ctx *ctx = bio->bi_private;
>  	struct drbd_device *device = ctx->device;
>  	struct drbd_bitmap *b = device->bitmap;
> -	unsigned int idx = bm_page_to_idx(bio_first_page_all(bio));
> +	unsigned int idx = bm_page_to_idx(&bio_first_folio_all(bio)->page);
>  
>  	if ((ctx->flags & BM_AIO_COPY_PAGES) == 0 &&
>  	    !bm_test_page_unchanged(b->bm_pages[idx]))
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 5882afe71d82..6706858de984 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -288,7 +288,7 @@ static void f2fs_post_read_work(struct work_struct *work)
>  
>  static void f2fs_read_end_io(struct bio *bio)
>  {
> -	struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
> +	struct f2fs_sb_info *sbi = F2FS_P_SB(&bio_first_folio_all(bio)->page);
>  	struct bio_post_read_ctx *ctx;
>  	bool intask = in_task();
>  
> diff --git a/include/linux/bio.h b/include/linux/bio.h
> index c4f5b5228105..7d2979d24530 100644
> --- a/include/linux/bio.h
> +++ b/include/linux/bio.h
> @@ -248,9 +248,9 @@ static inline struct bio_vec *bio_first_bvec_all(struct bio *bio)
>  	return bio->bi_io_vec;
>  }
>  
> -static inline struct page *bio_first_page_all(struct bio *bio)
> +static inline struct folio *bio_first_folio_all(struct bio *bio)
>  {
> -	return bio_first_bvec_all(bio)->bv_page;
> +	return page_folio(bio_first_bvec_all(bio)->bv_page);
>  }
>  
>  static inline struct bio_vec *bio_last_bvec_all(struct bio *bio)
> diff --git a/kernel/power/swap.c b/kernel/power/swap.c
> index f6ebcd00c410..2796ce48ca4b 100644
> --- a/kernel/power/swap.c
> +++ b/kernel/power/swap.c
> @@ -247,7 +247,7 @@ static void hib_finish_batch(struct hib_bio_batch *hb)
>  static void hib_end_io(struct bio *bio)
>  {
>  	struct hib_bio_batch *hb = bio->bi_private;
> -	struct page *page = bio_first_page_all(bio);
> +	struct page *page = &bio_first_folio_all(bio)->page;
>  
>  	if (bio->bi_status) {
>  		pr_alert("Read-error on swap-device (%u:%u:%Lu)\n",
> diff --git a/mm/page_io.c b/mm/page_io.c
> index 5ddb5d9c5013..e21d570c873d 100644
> --- a/mm/page_io.c
> +++ b/mm/page_io.c
> @@ -29,7 +29,7 @@
>  
>  static void __end_swap_bio_write(struct bio *bio)
>  {
> -	struct page *page = bio_first_page_all(bio);
> +	struct page *page = &bio_first_folio_all(bio)->page;
>  
>  	if (bio->bi_status) {
>  		/*
> @@ -57,7 +57,7 @@ static void end_swap_bio_write(struct bio *bio)
>  
>  static void __end_swap_bio_read(struct bio *bio)
>  {
> -	struct page *page = bio_first_page_all(bio);
> +	struct page *page = &bio_first_folio_all(bio)->page;
>  
>  	if (bio->bi_status) {
>  		pr_alert_ratelimited("Read-error on swap-device (%u:%u:%llu)\n",
> -- 
> 2.25.1
>
Christoph Hellwig July 20, 2023, 5:34 a.m. UTC | #2 
On Wed, Jul 19, 2023 at 03:17:34PM +0100, Matthew Wilcox wrote:
> On Wed, Jul 19, 2023 at 05:58:42PM +0800, Peng Zhang wrote:
> > From: ZhangPeng <zhangpeng362@huawei.com>
> > 
> > Convert bio_first_page_all() to bio_first_folio_all() to return a
> > folio, which makes it easier to use.
> 
> This wasn't what I was suggesting.  Indeed, this may introduce bugs.
> I was suggesting adding bio_first_folio_all() so that it can be used
> by code that knows this is what it wants.

To add another opinion:  I'd really like to see bio_first_page_all
go away.  The right way to iterate over the pages is an iterator.
If we really want to micro-opimize not setting up an iteator because
we know we have exactly one page/folio just stash it into bi_private.
Peng Zhang July 20, 2023, 9:31 a.m. UTC | #3 
On 2023/7/19 22:17, Matthew Wilcox wrote:

> On Wed, Jul 19, 2023 at 05:58:42PM +0800, Peng Zhang wrote:
>> From: ZhangPeng<zhangpeng362@huawei.com>
>>
>> Convert bio_first_page_all() to bio_first_folio_all() to return a
>> folio, which makes it easier to use.
> This wasn't what I was suggesting.  Indeed, this may introduce bugs.
> I was suggesting adding bio_first_folio_all() so that it can be used
> by code that knows this is what it wants.

Sorry for my misunderstanding, I will fix it in the next version.

>> Suggested-by: Matthew Wilcox (Oracle)<willy@infradead.org>
>> Signed-off-by: ZhangPeng<zhangpeng362@huawei.com>
>> ---
>>   Documentation/block/biovecs.rst  | 2 +-
>>   drivers/block/drbd/drbd_bitmap.c | 2 +-
>>   fs/f2fs/data.c                   | 2 +-
>>   include/linux/bio.h              | 4 ++--
>>   kernel/power/swap.c              | 2 +-
>>   mm/page_io.c                     | 4 ++--
>>   6 files changed, 8 insertions(+), 8 deletions(-)
>>
>> diff --git a/Documentation/block/biovecs.rst b/Documentation/block/biovecs.rst
>> index ddb867e0185b..258f6faed333 100644
>> --- a/Documentation/block/biovecs.rst
>> +++ b/Documentation/block/biovecs.rst
>> @@ -133,7 +133,7 @@ Usage of helpers:
>>   	bio_for_each_segment_all()
>>   	bio_for_each_bvec_all()
>>   	bio_first_bvec_all()
>> -	bio_first_page_all()
>> +	bio_first_folio_all()
>>   	bio_last_bvec_all()
>>   
>>   * The following helpers iterate over single-page segment. The passed 'struct
>> diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
>> index 85ca000a0564..ce1a07ba85ff 100644
>> --- a/drivers/block/drbd/drbd_bitmap.c
>> +++ b/drivers/block/drbd/drbd_bitmap.c
>> @@ -939,7 +939,7 @@ static void drbd_bm_endio(struct bio *bio)
>>   	struct drbd_bm_aio_ctx *ctx = bio->bi_private;
>>   	struct drbd_device *device = ctx->device;
>>   	struct drbd_bitmap *b = device->bitmap;
>> -	unsigned int idx = bm_page_to_idx(bio_first_page_all(bio));
>> +	unsigned int idx = bm_page_to_idx(&bio_first_folio_all(bio)->page);
>>   
>>   	if ((ctx->flags & BM_AIO_COPY_PAGES) == 0 &&
>>   	    !bm_test_page_unchanged(b->bm_pages[idx]))
>> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
>> index 5882afe71d82..6706858de984 100644
>> --- a/fs/f2fs/data.c
>> +++ b/fs/f2fs/data.c
>> @@ -288,7 +288,7 @@ static void f2fs_post_read_work(struct work_struct *work)
>>   
>>   static void f2fs_read_end_io(struct bio *bio)
>>   {
>> -	struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
>> +	struct f2fs_sb_info *sbi = F2FS_P_SB(&bio_first_folio_all(bio)->page);
>>   	struct bio_post_read_ctx *ctx;
>>   	bool intask = in_task();
>>   
>> diff --git a/include/linux/bio.h b/include/linux/bio.h
>> index c4f5b5228105..7d2979d24530 100644
>> --- a/include/linux/bio.h
>> +++ b/include/linux/bio.h
>> @@ -248,9 +248,9 @@ static inline struct bio_vec *bio_first_bvec_all(struct bio *bio)
>>   	return bio->bi_io_vec;
>>   }
>>   
>> -static inline struct page *bio_first_page_all(struct bio *bio)
>> +static inline struct folio *bio_first_folio_all(struct bio *bio)
>>   {
>> -	return bio_first_bvec_all(bio)->bv_page;
>> +	return page_folio(bio_first_bvec_all(bio)->bv_page);
>>   }
>>   
>>   static inline struct bio_vec *bio_last_bvec_all(struct bio *bio)
>> diff --git a/kernel/power/swap.c b/kernel/power/swap.c
>> index f6ebcd00c410..2796ce48ca4b 100644
>> --- a/kernel/power/swap.c
>> +++ b/kernel/power/swap.c
>> @@ -247,7 +247,7 @@ static void hib_finish_batch(struct hib_bio_batch *hb)
>>   static void hib_end_io(struct bio *bio)
>>   {
>>   	struct hib_bio_batch *hb = bio->bi_private;
>> -	struct page *page = bio_first_page_all(bio);
>> +	struct page *page = &bio_first_folio_all(bio)->page;
>>   
>>   	if (bio->bi_status) {
>>   		pr_alert("Read-error on swap-device (%u:%u:%Lu)\n",
>> diff --git a/mm/page_io.c b/mm/page_io.c
>> index 5ddb5d9c5013..e21d570c873d 100644
>> --- a/mm/page_io.c
>> +++ b/mm/page_io.c
>> @@ -29,7 +29,7 @@
>>   
>>   static void __end_swap_bio_write(struct bio *bio)
>>   {
>> -	struct page *page = bio_first_page_all(bio);
>> +	struct page *page = &bio_first_folio_all(bio)->page;
>>   
>>   	if (bio->bi_status) {
>>   		/*
>> @@ -57,7 +57,7 @@ static void end_swap_bio_write(struct bio *bio)
>>   
>>   static void __end_swap_bio_read(struct bio *bio)
>>   {
>> -	struct page *page = bio_first_page_all(bio);
>> +	struct page *page = &bio_first_folio_all(bio)->page;
>>   
>>   	if (bio->bi_status) {
>>   		pr_alert_ratelimited("Read-error on swap-device (%u:%u:%llu)\n",
>> -- 
>> 2.25.1
>>
diff mbox series

Patch

diff --git a/Documentation/block/biovecs.rst b/Documentation/block/biovecs.rst
index ddb867e0185b..258f6faed333 100644
--- a/Documentation/block/biovecs.rst
+++ b/Documentation/block/biovecs.rst
@@ -133,7 +133,7 @@  Usage of helpers:
 	bio_for_each_segment_all()
 	bio_for_each_bvec_all()
 	bio_first_bvec_all()
-	bio_first_page_all()
+	bio_first_folio_all()
 	bio_last_bvec_all()
 
 * The following helpers iterate over single-page segment. The passed 'struct
diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index 85ca000a0564..ce1a07ba85ff 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -939,7 +939,7 @@  static void drbd_bm_endio(struct bio *bio)
 	struct drbd_bm_aio_ctx *ctx = bio->bi_private;
 	struct drbd_device *device = ctx->device;
 	struct drbd_bitmap *b = device->bitmap;
-	unsigned int idx = bm_page_to_idx(bio_first_page_all(bio));
+	unsigned int idx = bm_page_to_idx(&bio_first_folio_all(bio)->page);
 
 	if ((ctx->flags & BM_AIO_COPY_PAGES) == 0 &&
 	    !bm_test_page_unchanged(b->bm_pages[idx]))
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 5882afe71d82..6706858de984 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -288,7 +288,7 @@  static void f2fs_post_read_work(struct work_struct *work)
 
 static void f2fs_read_end_io(struct bio *bio)
 {
-	struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
+	struct f2fs_sb_info *sbi = F2FS_P_SB(&bio_first_folio_all(bio)->page);
 	struct bio_post_read_ctx *ctx;
 	bool intask = in_task();
 
diff --git a/include/linux/bio.h b/include/linux/bio.h
index c4f5b5228105..7d2979d24530 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -248,9 +248,9 @@  static inline struct bio_vec *bio_first_bvec_all(struct bio *bio)
 	return bio->bi_io_vec;
 }
 
-static inline struct page *bio_first_page_all(struct bio *bio)
+static inline struct folio *bio_first_folio_all(struct bio *bio)
 {
-	return bio_first_bvec_all(bio)->bv_page;
+	return page_folio(bio_first_bvec_all(bio)->bv_page);
 }
 
 static inline struct bio_vec *bio_last_bvec_all(struct bio *bio)
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index f6ebcd00c410..2796ce48ca4b 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -247,7 +247,7 @@  static void hib_finish_batch(struct hib_bio_batch *hb)
 static void hib_end_io(struct bio *bio)
 {
 	struct hib_bio_batch *hb = bio->bi_private;
-	struct page *page = bio_first_page_all(bio);
+	struct page *page = &bio_first_folio_all(bio)->page;
 
 	if (bio->bi_status) {
 		pr_alert("Read-error on swap-device (%u:%u:%Lu)\n",
diff --git a/mm/page_io.c b/mm/page_io.c
index 5ddb5d9c5013..e21d570c873d 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -29,7 +29,7 @@ 
 
 static void __end_swap_bio_write(struct bio *bio)
 {
-	struct page *page = bio_first_page_all(bio);
+	struct page *page = &bio_first_folio_all(bio)->page;
 
 	if (bio->bi_status) {
 		/*
@@ -57,7 +57,7 @@  static void end_swap_bio_write(struct bio *bio)
 
 static void __end_swap_bio_read(struct bio *bio)
 {
-	struct page *page = bio_first_page_all(bio);
+	struct page *page = &bio_first_folio_all(bio)->page;
 
 	if (bio->bi_status) {
 		pr_alert_ratelimited("Read-error on swap-device (%u:%u:%llu)\n",