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[PATCH v2] sh: sq: Use the bitmap API when applicable

Christophe JAILLET posted 1 patch 2 years, 8 months ago 
arch/sh/kernel/cpu/sh4/sq.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
[PATCH v2] sh: sq: Use the bitmap API when applicable
Posted by Christophe JAILLET 2 years, 8 months ago 
Using the bitmap API is less verbose than hand writing it.
It also improves the semantic.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
v2:
   - synch with latest linux-next because of 80f746e2bd0e which fixes a bug
---
 arch/sh/kernel/cpu/sh4/sq.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/sh/kernel/cpu/sh4/sq.c b/arch/sh/kernel/cpu/sh4/sq.c
index 27f2e3da5aa2..d289e99dc118 100644
--- a/arch/sh/kernel/cpu/sh4/sq.c
+++ b/arch/sh/kernel/cpu/sh4/sq.c
@@ -372,7 +372,6 @@ static struct subsys_interface sq_interface = {
 static int __init sq_api_init(void)
 {
 	unsigned int nr_pages = 0x04000000 >> PAGE_SHIFT;
-	unsigned int size = (nr_pages + (BITS_PER_LONG - 1)) / BITS_PER_LONG;
 	int ret = -ENOMEM;
 
 	printk(KERN_NOTICE "sq: Registering store queue API.\n");
@@ -382,7 +381,7 @@ static int __init sq_api_init(void)
 	if (unlikely(!sq_cache))
 		return ret;
 
-	sq_bitmap = kcalloc(size, sizeof(long), GFP_KERNEL);
+	sq_bitmap = bitmap_zalloc(nr_pages, GFP_KERNEL);
 	if (unlikely(!sq_bitmap))
 		goto out;
 
@@ -393,7 +392,7 @@ static int __init sq_api_init(void)
 	return 0;
 
 out:
-	kfree(sq_bitmap);
+	bitmap_free(sq_bitmap);
 	kmem_cache_destroy(sq_cache);
 
 	return ret;
@@ -402,7 +401,7 @@ static int __init sq_api_init(void)
 static void __exit sq_api_exit(void)
 {
 	subsys_interface_unregister(&sq_interface);
-	kfree(sq_bitmap);
+	bitmap_free(sq_bitmap);
 	kmem_cache_destroy(sq_cache);
 }
 
-- 
2.34.1
Re: [PATCH v2] sh: sq: Use the bitmap API when applicable
Posted by John Paul Adrian Glaubitz 2 years, 7 months ago 
On Thu, 2023-04-20 at 21:19 +0200, Christophe JAILLET wrote:
> Using the bitmap API is less verbose than hand writing it.
> It also improves the semantic.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> v2:
>    - synch with latest linux-next because of 80f746e2bd0e which fixes a bug
> ---
>  arch/sh/kernel/cpu/sh4/sq.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/sh/kernel/cpu/sh4/sq.c b/arch/sh/kernel/cpu/sh4/sq.c
> index 27f2e3da5aa2..d289e99dc118 100644
> --- a/arch/sh/kernel/cpu/sh4/sq.c
> +++ b/arch/sh/kernel/cpu/sh4/sq.c
> @@ -372,7 +372,6 @@ static struct subsys_interface sq_interface = {
>  static int __init sq_api_init(void)
>  {
>  	unsigned int nr_pages = 0x04000000 >> PAGE_SHIFT;
> -	unsigned int size = (nr_pages + (BITS_PER_LONG - 1)) / BITS_PER_LONG;
>  	int ret = -ENOMEM;
>  
>  	printk(KERN_NOTICE "sq: Registering store queue API.\n");
> @@ -382,7 +381,7 @@ static int __init sq_api_init(void)
>  	if (unlikely(!sq_cache))
>  		return ret;
>  
> -	sq_bitmap = kcalloc(size, sizeof(long), GFP_KERNEL);
> +	sq_bitmap = bitmap_zalloc(nr_pages, GFP_KERNEL);
>  	if (unlikely(!sq_bitmap))
>  		goto out;
>  
> @@ -393,7 +392,7 @@ static int __init sq_api_init(void)
>  	return 0;
>  
>  out:
> -	kfree(sq_bitmap);
> +	bitmap_free(sq_bitmap);
>  	kmem_cache_destroy(sq_cache);
>  
>  	return ret;
> @@ -402,7 +401,7 @@ static int __init sq_api_init(void)
>  static void __exit sq_api_exit(void)
>  {
>  	subsys_interface_unregister(&sq_interface);
> -	kfree(sq_bitmap);
> +	bitmap_free(sq_bitmap);
>  	kmem_cache_destroy(sq_cache);
>  }
>  

Applied to my for-next branch for 6.4.

Thanks,
Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913
Re: [PATCH v2] sh: sq: Use the bitmap API when applicable
Posted by John Paul Adrian Glaubitz 2 years, 8 months ago 
On Thu, 2023-04-20 at 21:19 +0200, Christophe JAILLET wrote:
> Using the bitmap API is less verbose than hand writing it.
> It also improves the semantic.
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> v2:
>    - synch with latest linux-next because of 80f746e2bd0e which fixes a bug
> ---
>  arch/sh/kernel/cpu/sh4/sq.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/sh/kernel/cpu/sh4/sq.c b/arch/sh/kernel/cpu/sh4/sq.c
> index 27f2e3da5aa2..d289e99dc118 100644
> --- a/arch/sh/kernel/cpu/sh4/sq.c
> +++ b/arch/sh/kernel/cpu/sh4/sq.c
> @@ -372,7 +372,6 @@ static struct subsys_interface sq_interface = {
>  static int __init sq_api_init(void)
>  {
>  	unsigned int nr_pages = 0x04000000 >> PAGE_SHIFT;
> -	unsigned int size = (nr_pages + (BITS_PER_LONG - 1)) / BITS_PER_LONG;
>  	int ret = -ENOMEM;
>  
>  	printk(KERN_NOTICE "sq: Registering store queue API.\n");
> @@ -382,7 +381,7 @@ static int __init sq_api_init(void)
>  	if (unlikely(!sq_cache))
>  		return ret;
>  
> -	sq_bitmap = kcalloc(size, sizeof(long), GFP_KERNEL);
> +	sq_bitmap = bitmap_zalloc(nr_pages, GFP_KERNEL);
>  	if (unlikely(!sq_bitmap))
>  		goto out;
>  
> @@ -393,7 +392,7 @@ static int __init sq_api_init(void)
>  	return 0;
>  
>  out:
> -	kfree(sq_bitmap);
> +	bitmap_free(sq_bitmap);
>  	kmem_cache_destroy(sq_cache);
>  
>  	return ret;
> @@ -402,7 +401,7 @@ static int __init sq_api_init(void)
>  static void __exit sq_api_exit(void)
>  {
>  	subsys_interface_unregister(&sq_interface);
> -	kfree(sq_bitmap);
> +	bitmap_free(sq_bitmap);
>  	kmem_cache_destroy(sq_cache);
>  }
>  

Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer
`. `'   Physicist
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913
Re: [PATCH v2] sh: sq: Use the bitmap API when applicable
Posted by Geert Uytterhoeven 2 years, 8 months ago 
On Thu, Apr 20, 2023 at 9:41 PM Christophe JAILLET
<christophe.jaillet@wanadoo.fr> wrote:
> Using the bitmap API is less verbose than hand writing it.
> It also improves the semantic.
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> v2:
>    - synch with latest linux-next because of 80f746e2bd0e which fixes a bug

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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