[PATCH] mips: bus: make mips_cdmm_bustype const

[PATCH] mips: bus: make mips_cdmm_bustype const

[Ricardo B. Marliere]

Now that the driver core can properly handle constant struct bus_type,
move the mips_cdmm_bustype variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
---
 arch/mips/include/asm/cdmm.h | 2 +-
 drivers/bus/mips_cdmm.c      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/mips/include/asm/cdmm.h b/arch/mips/include/asm/cdmm.h
index c06dbf8ba937..81fa99084178 100644
--- a/arch/mips/include/asm/cdmm.h
+++ b/arch/mips/include/asm/cdmm.h
@@ -63,7 +63,7 @@ struct mips_cdmm_driver {
  */
 phys_addr_t mips_cdmm_phys_base(void);
 
-extern struct bus_type mips_cdmm_bustype;
+extern const struct bus_type mips_cdmm_bustype;
 void __iomem *mips_cdmm_early_probe(unsigned int dev_type);
 
 #define to_mips_cdmm_device(d)	container_of(d, struct mips_cdmm_device, dev)
diff --git a/drivers/bus/mips_cdmm.c b/drivers/bus/mips_cdmm.c
index 554e1992edd4..8baf14bd5eff 100644
--- a/drivers/bus/mips_cdmm.c
+++ b/drivers/bus/mips_cdmm.c
@@ -118,7 +118,7 @@ static struct attribute *mips_cdmm_dev_attrs[] = {
 };
 ATTRIBUTE_GROUPS(mips_cdmm_dev);
 
-struct bus_type mips_cdmm_bustype = {
+const struct bus_type mips_cdmm_bustype = {
 	.name		= "cdmm",
 	.dev_groups	= mips_cdmm_dev_groups,
 	.match		= mips_cdmm_match,

---
base-commit: 841c35169323cd833294798e58b9bf63fa4fa1de
change-id: 20240213-bus_cleanup-mips2-434cc6d8f7bd

Best regards,
-- 
Ricardo B. Marliere <ricardo@marliere.net>

Re: [PATCH] mips: bus: make mips_cdmm_bustype const

[Greg Kroah-Hartman]

On Tue, Feb 13, 2024 at 11:49:24AM -0300, Ricardo B. Marliere wrote:
> Now that the driver core can properly handle constant struct bus_type,
> move the mips_cdmm_bustype variable to be a constant structure as well,
> placing it into read-only memory which can not be modified at runtime.
> 
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
> ---

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Re: [PATCH] mips: bus: make mips_cdmm_bustype const

[Serge Semin]

Hi Ricardo

On Tue, Feb 13, 2024 at 11:49:24AM -0300, Ricardo B. Marliere wrote:
> Now that the driver core can properly handle constant struct bus_type,
> move the mips_cdmm_bustype variable to be a constant structure as well,
> placing it into read-only memory which can not be modified at runtime.

Thanks for the patch.

Tested-by: Serge Semin <fancer.lancer@gmail.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>

-Serge(y)

> 
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
> ---
>  arch/mips/include/asm/cdmm.h | 2 +-
>  drivers/bus/mips_cdmm.c      | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/mips/include/asm/cdmm.h b/arch/mips/include/asm/cdmm.h
> index c06dbf8ba937..81fa99084178 100644
> --- a/arch/mips/include/asm/cdmm.h
> +++ b/arch/mips/include/asm/cdmm.h
> @@ -63,7 +63,7 @@ struct mips_cdmm_driver {
>   */
>  phys_addr_t mips_cdmm_phys_base(void);
>  
> -extern struct bus_type mips_cdmm_bustype;
> +extern const struct bus_type mips_cdmm_bustype;
>  void __iomem *mips_cdmm_early_probe(unsigned int dev_type);
>  
>  #define to_mips_cdmm_device(d)	container_of(d, struct mips_cdmm_device, dev)
> diff --git a/drivers/bus/mips_cdmm.c b/drivers/bus/mips_cdmm.c
> index 554e1992edd4..8baf14bd5eff 100644
> --- a/drivers/bus/mips_cdmm.c
> +++ b/drivers/bus/mips_cdmm.c
> @@ -118,7 +118,7 @@ static struct attribute *mips_cdmm_dev_attrs[] = {
>  };
>  ATTRIBUTE_GROUPS(mips_cdmm_dev);
>  
> -struct bus_type mips_cdmm_bustype = {
> +const struct bus_type mips_cdmm_bustype = {
>  	.name		= "cdmm",
>  	.dev_groups	= mips_cdmm_dev_groups,
>  	.match		= mips_cdmm_match,
> 
> ---
> base-commit: 841c35169323cd833294798e58b9bf63fa4fa1de
> change-id: 20240213-bus_cleanup-mips2-434cc6d8f7bd
> 
> Best regards,
> -- 
> Ricardo B. Marliere <ricardo@marliere.net>
> 

Re: [PATCH] mips: bus: make mips_cdmm_bustype const

[Thomas Bogendoerfer]

On Tue, Feb 13, 2024 at 11:49:24AM -0300, Ricardo B. Marliere wrote:
> Now that the driver core can properly handle constant struct bus_type,
> move the mips_cdmm_bustype variable to be a constant structure as well,
> placing it into read-only memory which can not be modified at runtime.
> 
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
> ---
>  arch/mips/include/asm/cdmm.h | 2 +-
>  drivers/bus/mips_cdmm.c      | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)

applied to mips-next.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]