diff mbox series

[RFC,29/34] power/swap: use bio_new in hib_submit_io

Message ID 20210128071133.60335-30-chaitanya.kulkarni@wdc.com (mailing list archive)
State New, archived
Headers show
Series block: introduce bio_new() | expand

Commit Message

Chaitanya Kulkarni Jan. 28, 2021, 7:11 a.m. UTC 
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
 kernel/power/swap.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

Comments

Rafael J. Wysocki Jan. 28, 2021, 10:21 a.m. UTC | #1 
On Thu, Jan 28, 2021 at 8:21 AM Chaitanya Kulkarni
<chaitanya.kulkarni@wdc.com> wrote:
>

Please explain in the changelog why making this change is a good idea.

> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
> ---
>  kernel/power/swap.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/kernel/power/swap.c b/kernel/power/swap.c
> index c73f2e295167..e92e36c053a6 100644
> --- a/kernel/power/swap.c
> +++ b/kernel/power/swap.c
> @@ -271,13 +271,12 @@ static int hib_submit_io(int op, int op_flags, pgoff_t page_off, void *addr,
>                 struct hib_bio_batch *hb)
>  {
>         struct page *page = virt_to_page(addr);
> +       sector_t sect = page_off * (PAGE_SIZE >> 9);
>         struct bio *bio;
>         int error = 0;
>
> -       bio = bio_alloc(GFP_NOIO | __GFP_HIGH, 1);
> -       bio->bi_iter.bi_sector = page_off * (PAGE_SIZE >> 9);
> -       bio_set_dev(bio, hib_resume_bdev);
> -       bio_set_op_attrs(bio, op, op_flags);
> +       bio = bio_new(hib_resume_bdev, sect, op, op_flags, 1,
> +                     GFP_NOIO | __GFP_HIGH);
>
>         if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
>                 pr_err("Adding page to bio failed at %llu\n",
> --
> 2.22.1
>
Pavel Machek Feb. 17, 2021, 10:02 p.m. UTC | #2 
Hi!
> 
> diff --git a/kernel/power/swap.c b/kernel/power/swap.c
> index c73f2e295167..e92e36c053a6 100644
> --- a/kernel/power/swap.c
> +++ b/kernel/power/swap.c
> @@ -271,13 +271,12 @@ static int hib_submit_io(int op, int op_flags, pgoff_t page_off, void *addr,
>  		struct hib_bio_batch *hb)
>  {
>  	struct page *page = virt_to_page(addr);
> +	sector_t sect = page_off * (PAGE_SIZE >> 9);
>  	struct bio *bio;
>  	int error = 0;
>  
> -	bio = bio_alloc(GFP_NOIO | __GFP_HIGH, 1);
> -	bio->bi_iter.bi_sector = page_off * (PAGE_SIZE >> 9);
> -	bio_set_dev(bio, hib_resume_bdev);
> -	bio_set_op_attrs(bio, op, op_flags);
> +	bio = bio_new(hib_resume_bdev, sect, op, op_flags, 1,
> +		      GFP_NOIO | __GFP_HIGH);
>  

C function with 6 arguments... dunno. Old version looks comparable or
even more readable...

Best regards,
							Pavel
Chaitanya Kulkarni Feb. 18, 2021, 1:28 a.m. UTC | #3 
On 2/17/21 14:03, Pavel Machek wrote:
> Hi!
>> diff --git a/kernel/power/swap.c b/kernel/power/swap.c
>> index c73f2e295167..e92e36c053a6 100644
>> --- a/kernel/power/swap.c
>> +++ b/kernel/power/swap.c
>> @@ -271,13 +271,12 @@ static int hib_submit_io(int op, int op_flags, pgoff_t page_off, void *addr,
>>  		struct hib_bio_batch *hb)
>>  {
>>  	struct page *page = virt_to_page(addr);
>> +	sector_t sect = page_off * (PAGE_SIZE >> 9);
>>  	struct bio *bio;
>>  	int error = 0;
>>  
>> -	bio = bio_alloc(GFP_NOIO | __GFP_HIGH, 1);
>> -	bio->bi_iter.bi_sector = page_off * (PAGE_SIZE >> 9);
>> -	bio_set_dev(bio, hib_resume_bdev);
>> -	bio_set_op_attrs(bio, op, op_flags);
>> +	bio = bio_new(hib_resume_bdev, sect, op, op_flags, 1,
>> +		      GFP_NOIO | __GFP_HIGH);
>>  
> C function with 6 arguments... dunno. Old version looks comparable or
> even more readable...
>
> Best regards,
> 							Pavel
The library functions that are in the kernel tree which are used
in different file-systems and fabrics drivers do take 6 arguments.

Plus what is the point of duplicating code for mandatory
parameters all over the kernel ?
diff mbox series

Patch

diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index c73f2e295167..e92e36c053a6 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -271,13 +271,12 @@  static int hib_submit_io(int op, int op_flags, pgoff_t page_off, void *addr,
 		struct hib_bio_batch *hb)
 {
 	struct page *page = virt_to_page(addr);
+	sector_t sect = page_off * (PAGE_SIZE >> 9);
 	struct bio *bio;
 	int error = 0;
 
-	bio = bio_alloc(GFP_NOIO | __GFP_HIGH, 1);
-	bio->bi_iter.bi_sector = page_off * (PAGE_SIZE >> 9);
-	bio_set_dev(bio, hib_resume_bdev);
-	bio_set_op_attrs(bio, op, op_flags);
+	bio = bio_new(hib_resume_bdev, sect, op, op_flags, 1,
+		      GFP_NOIO | __GFP_HIGH);
 
 	if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
 		pr_err("Adding page to bio failed at %llu\n",