[PATCH v2] siox: make siox_bus_type const

[PATCH v2] siox: make siox_bus_type const

[Ricardo B. Marliere]

Since commit d492cc2573a0 ("driver core: device.h: make struct bus_type
a const *"), the driver core can properly handle constant struct
bus_type. Move the siox_bus_type 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>
---
Changes in v2:
- Fixed changelog: mentioned commit d492cc2573a0 instead of the word
  "Now".
- Link to v1: https://lore.kernel.org/r/20240204-bus_cleanup-siox-v1-1-2d12583d3a6c@marliere.net
---
 drivers/siox/siox-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/siox/siox-core.c b/drivers/siox/siox-core.c
index 561408583b2b..a1eda7bd76ed 100644
--- a/drivers/siox/siox-core.c
+++ b/drivers/siox/siox-core.c
@@ -543,7 +543,7 @@ static void siox_shutdown(struct device *dev)
 		sdriver->shutdown(sdevice);
 }
 
-static struct bus_type siox_bus_type = {
+static const struct bus_type siox_bus_type = {
 	.name = "siox",
 	.match = siox_match,
 	.probe = siox_probe,

---
base-commit: 41b9fb381a486360b2daaec0c7480f8e3ff72bc7
change-id: 20240204-bus_cleanup-siox-ccf8775bf069

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

Re: [PATCH v2] siox: make siox_bus_type const

[Uwe Kleine-König]

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Hello Ricardo,

On Sun, Feb 04, 2024 at 07:26:42PM -0300, Ricardo B. Marliere wrote:
> Since commit d492cc2573a0 ("driver core: device.h: make struct bus_type
> a const *"), the driver core can properly handle constant struct
> bus_type. Move the siox_bus_type 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>

I currently have no setup to test this, but compilation is fine, and I
don't expect any surprises.

Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Thanks for your patch,
Uwe

PS: b4 gave me:

  ✗ [PATCH v2] siox: make siox_bus_type const
  ✗ No key: openpgp/ricardo@marliere.net
  ✗ BADSIG: DKIM/marliere.net

when applying your patch. I didn't check the details of the DKIM issue. I
quickly tried to find your pgp key, but failed (wks, kernel-pgpkeys
repo, keyserver).

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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Re: [PATCH v2] siox: make siox_bus_type const

[Ricardo B. Marliere]

On  5 Feb 10:03, Uwe Kleine-König wrote:
> Hello Ricardo,
> 
> On Sun, Feb 04, 2024 at 07:26:42PM -0300, Ricardo B. Marliere wrote:
> > Since commit d492cc2573a0 ("driver core: device.h: make struct bus_type
> > a const *"), the driver core can properly handle constant struct
> > bus_type. Move the siox_bus_type 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>
> 
> I currently have no setup to test this, but compilation is fine, and I
> don't expect any surprises.
> 
> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> 
> Thanks for your patch,
> Uwe
> 
> PS: b4 gave me:
> 
>   ✗ [PATCH v2] siox: make siox_bus_type const
>   ✗ No key: openpgp/ricardo@marliere.net
>   ✗ BADSIG: DKIM/marliere.net
> 
> when applying your patch. I didn't check the details of the DKIM issue. I
> quickly tried to find your pgp key, but failed (wks, kernel-pgpkeys
> repo, keyserver).

Thanks for the heads up, I'll go check what's wrong. I think I only
published the @gmail.com one.!

Best regards,
-	Ricardo.


> 
> -- 
> Pengutronix e.K.                           | Uwe Kleine-König            |
> Industrial Linux Solutions                 | https://www.pengutronix.de/ |

Re: [PATCH v2] siox: make siox_bus_type const

[Greg Kroah-Hartman]

On Sun, Feb 04, 2024 at 07:26:42PM -0300, Ricardo B. Marliere wrote:
> Since commit d492cc2573a0 ("driver core: device.h: make struct bus_type
> a const *"), the driver core can properly handle constant struct
> bus_type. Move the siox_bus_type 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 v2] siox: make siox_bus_type const

[Thorsten Scherer]

Hello,

On Sun, Feb 04, 2024 at 07:26:42PM -0300, Ricardo B. Marliere wrote:
> Since commit d492cc2573a0 ("driver core: device.h: make struct bus_type
> a const *"), the driver core can properly handle constant struct
> bus_type. Move the siox_bus_type 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>

Acked-by: Thorsten Scherer <t.scherer@eckelmann.de>

@Ricardo: Thank you!

@gregkh: Would you please pick up this patch?

> ---
> Changes in v2:
> - Fixed changelog: mentioned commit d492cc2573a0 instead of the word
>   "Now".
> - Link to v1: https://lore.kernel.org/r/20240204-bus_cleanup-siox-v1-1-2d12583d3a6c@marliere.net
> ---
>  drivers/siox/siox-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/siox/siox-core.c b/drivers/siox/siox-core.c
> index 561408583b2b..a1eda7bd76ed 100644
> --- a/drivers/siox/siox-core.c
> +++ b/drivers/siox/siox-core.c
> @@ -543,7 +543,7 @@ static void siox_shutdown(struct device *dev)
>  		sdriver->shutdown(sdevice);
>  }
>  
> -static struct bus_type siox_bus_type = {
> +static const struct bus_type siox_bus_type = {
>  	.name = "siox",
>  	.match = siox_match,
>  	.probe = siox_probe,
> 
> ---
> base-commit: 41b9fb381a486360b2daaec0c7480f8e3ff72bc7
> change-id: 20240204-bus_cleanup-siox-ccf8775bf069
> 
> Best regards,
> -- 
> Ricardo B. Marliere <ricardo@marliere.net>
> 

Best regards
Thorsten