diff mbox series

[05/14] s390/cio: rename bitmap_size() -> idset_bitmap_size()

Message ID 20231009151026.66145-6-aleksander.lobakin@intel.com (mailing list archive)
State Not Applicable, archived
Delegated to: Mike Snitzer
Headers show
Series ip_tunnel: convert __be16 tunnel flags to bitmaps | expand

Commit Message

Alexander Lobakin Oct. 9, 2023, 3:10 p.m. UTC 
bitmap_size() is a pretty generic name and one may want to use it for
a generic bitmap API function. At the same time, its logic is not
"generic", i.e. it's not just `nbits -> size of bitmap in bytes`
converter as it would be expected from its name.
Add the prefix 'idset_' used throughout the file where the function
resides.

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
---
idset_new() really wants its vmalloc() + memset() pair to be replaced
with vzalloc().
---
 drivers/s390/cio/idset.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

Comments

Yury Norov Oct. 9, 2023, 4:35 p.m. UTC | #1 
On Mon, Oct 09, 2023 at 05:10:17PM +0200, Alexander Lobakin wrote:
> bitmap_size() is a pretty generic name and one may want to use it for
> a generic bitmap API function. At the same time, its logic is not
> "generic", i.e. it's not just `nbits -> size of bitmap in bytes`
> converter as it would be expected from its name.
> Add the prefix 'idset_' used throughout the file where the function
> resides.

At the first glance, this custom implementation just duplicates the
generic one that you introduce in the following patch. If so, why
don't you switch idset to just use generic bitmap_size()?

> 
> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
> Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
> ---
> idset_new() really wants its vmalloc() + memset() pair to be replaced
> with vzalloc().
> ---
>  drivers/s390/cio/idset.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/s390/cio/idset.c b/drivers/s390/cio/idset.c
> index 45f9c0736be4..0a1105a483bf 100644
> --- a/drivers/s390/cio/idset.c
> +++ b/drivers/s390/cio/idset.c
> @@ -16,7 +16,7 @@ struct idset {
>  	unsigned long bitmap[];
>  };
>  
> -static inline unsigned long bitmap_size(int num_ssid, int num_id)
> +static inline unsigned long idset_bitmap_size(int num_ssid, int num_id)
>  {
>  	return BITS_TO_LONGS(num_ssid * num_id) * sizeof(unsigned long);
>  }
> @@ -25,11 +25,12 @@ static struct idset *idset_new(int num_ssid, int num_id)
>  {
>  	struct idset *set;
>  
> -	set = vmalloc(sizeof(struct idset) + bitmap_size(num_ssid, num_id));
> +	set = vmalloc(sizeof(struct idset) +
> +		      idset_bitmap_size(num_ssid, num_id));
>  	if (set) {
>  		set->num_ssid = num_ssid;
>  		set->num_id = num_id;
> -		memset(set->bitmap, 0, bitmap_size(num_ssid, num_id));
> +		memset(set->bitmap, 0, idset_bitmap_size(num_ssid, num_id));
>  	}
>  	return set;
>  }
> @@ -41,7 +42,8 @@ void idset_free(struct idset *set)
>  
>  void idset_fill(struct idset *set)
>  {
> -	memset(set->bitmap, 0xff, bitmap_size(set->num_ssid, set->num_id));
> +	memset(set->bitmap, 0xff,
> +	       idset_bitmap_size(set->num_ssid, set->num_id));
>  }
>  
>  static inline void idset_add(struct idset *set, int ssid, int id)
> -- 
> 2.41.0

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Alexander Lobakin Oct. 11, 2023, 7:28 a.m. UTC | #2 
From: Yury Norov <yury.norov@gmail.com>
Date: Mon, 9 Oct 2023 09:35:20 -0700

> On Mon, Oct 09, 2023 at 05:10:17PM +0200, Alexander Lobakin wrote:
>> bitmap_size() is a pretty generic name and one may want to use it for
>> a generic bitmap API function. At the same time, its logic is not
>> "generic", i.e. it's not just `nbits -> size of bitmap in bytes`
>> converter as it would be expected from its name.
>> Add the prefix 'idset_' used throughout the file where the function
>> resides.
> 
> At the first glance, this custom implementation just duplicates the
> generic one that you introduce in the following patch. If so, why
> don't you switch idset to just use generic bitmap_size()?

I didn't want to introduce any semantic changes, but good point, why not.

> 
>>
>> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
>> Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>

[...]

Thanks,
Olek
diff mbox series

Patch

diff --git a/drivers/s390/cio/idset.c b/drivers/s390/cio/idset.c
index 45f9c0736be4..0a1105a483bf 100644
--- a/drivers/s390/cio/idset.c
+++ b/drivers/s390/cio/idset.c
@@ -16,7 +16,7 @@  struct idset {
 	unsigned long bitmap[];
 };
 
-static inline unsigned long bitmap_size(int num_ssid, int num_id)
+static inline unsigned long idset_bitmap_size(int num_ssid, int num_id)
 {
 	return BITS_TO_LONGS(num_ssid * num_id) * sizeof(unsigned long);
 }
@@ -25,11 +25,12 @@  static struct idset *idset_new(int num_ssid, int num_id)
 {
 	struct idset *set;
 
-	set = vmalloc(sizeof(struct idset) + bitmap_size(num_ssid, num_id));
+	set = vmalloc(sizeof(struct idset) +
+		      idset_bitmap_size(num_ssid, num_id));
 	if (set) {
 		set->num_ssid = num_ssid;
 		set->num_id = num_id;
-		memset(set->bitmap, 0, bitmap_size(num_ssid, num_id));
+		memset(set->bitmap, 0, idset_bitmap_size(num_ssid, num_id));
 	}
 	return set;
 }
@@ -41,7 +42,8 @@  void idset_free(struct idset *set)
 
 void idset_fill(struct idset *set)
 {
-	memset(set->bitmap, 0xff, bitmap_size(set->num_ssid, set->num_id));
+	memset(set->bitmap, 0xff,
+	       idset_bitmap_size(set->num_ssid, set->num_id));
 }
 
 static inline void idset_add(struct idset *set, int ssid, int id)