diff mbox series

coresight: constify the struct device_type usage

Message ID 20240219-device_cleanup-coresight-v1-1-4a8a0b816183@marliere.net
State New
Headers
Series coresight: constify the struct device_type usage |

Commit Message

Ricardo B. Marliere Feb. 19, 2024, 1:43 p.m. UTC 
  Since commit aed65af1cc2f ("drivers: make device_type const"), the driver
core can properly handle constant struct device_type. Move the
coresight_dev_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>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
---
 drivers/hwtracing/coresight/coresight-priv.h  | 2 +-
 drivers/hwtracing/coresight/coresight-sysfs.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)


---
base-commit: c099fdd218a0fedfe87e0b88d2ba0667eab3b3c8
change-id: 20240219-device_cleanup-coresight-00ba00fd5f21

Best regards,

Comments

James Clark Feb. 19, 2024, 3:36 p.m. UTC | #1 
On 19/02/2024 13:43, Ricardo B. Marliere wrote:
> Since commit aed65af1cc2f ("drivers: make device_type const"), the driver
> core can properly handle constant struct device_type. Move the
> coresight_dev_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>
> Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
> ---
>  drivers/hwtracing/coresight/coresight-priv.h  | 2 +-
>  drivers/hwtracing/coresight/coresight-sysfs.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
> index eb365236f9a9..ca3362cbdb70 100644
> --- a/drivers/hwtracing/coresight/coresight-priv.h
> +++ b/drivers/hwtracing/coresight/coresight-priv.h
> @@ -13,7 +13,7 @@
>  #include <linux/pm_runtime.h>
>  
>  extern struct mutex coresight_mutex;
> -extern struct device_type coresight_dev_type[];
> +extern const struct device_type coresight_dev_type[];
>  
>  /*
>   * Coresight management registers (0xf00-0xfcc)
> diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c
> index f9444e2cb1d9..1e67cc7758d7 100644
> --- a/drivers/hwtracing/coresight/coresight-sysfs.c
> +++ b/drivers/hwtracing/coresight/coresight-sysfs.c
> @@ -377,7 +377,7 @@ static struct attribute *coresight_source_attrs[] = {
>  };
>  ATTRIBUTE_GROUPS(coresight_source);
>  
> -struct device_type coresight_dev_type[] = {
> +const struct device_type coresight_dev_type[] = {
>  	[CORESIGHT_DEV_TYPE_SINK] = {
>  		.name = "sink",
>  		.groups = coresight_sink_groups,
> 
> ---
> base-commit: c099fdd218a0fedfe87e0b88d2ba0667eab3b3c8
> change-id: 20240219-device_cleanup-coresight-00ba00fd5f21
> 
> Best regards,


Reviewed-by: James Clark <james.clark@arm.com>
Anshuman Khandual Feb. 21, 2024, 3:39 a.m. UTC | #2 
On 2/19/24 19:13, Ricardo B. Marliere wrote:
> Since commit aed65af1cc2f ("drivers: make device_type const"), the driver
> core can properly handle constant struct device_type. Move the
> coresight_dev_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>
> Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
> ---

Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>

>  drivers/hwtracing/coresight/coresight-priv.h  | 2 +-
>  drivers/hwtracing/coresight/coresight-sysfs.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
> index eb365236f9a9..ca3362cbdb70 100644
> --- a/drivers/hwtracing/coresight/coresight-priv.h
> +++ b/drivers/hwtracing/coresight/coresight-priv.h
> @@ -13,7 +13,7 @@
>  #include <linux/pm_runtime.h>
>  
>  extern struct mutex coresight_mutex;
> -extern struct device_type coresight_dev_type[];
> +extern const struct device_type coresight_dev_type[];
>  
>  /*
>   * Coresight management registers (0xf00-0xfcc)
> diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c
> index f9444e2cb1d9..1e67cc7758d7 100644
> --- a/drivers/hwtracing/coresight/coresight-sysfs.c
> +++ b/drivers/hwtracing/coresight/coresight-sysfs.c
> @@ -377,7 +377,7 @@ static struct attribute *coresight_source_attrs[] = {
>  };
>  ATTRIBUTE_GROUPS(coresight_source);
>  
> -struct device_type coresight_dev_type[] = {
> +const struct device_type coresight_dev_type[] = {
>  	[CORESIGHT_DEV_TYPE_SINK] = {
>  		.name = "sink",
>  		.groups = coresight_sink_groups,
> 
> ---
> base-commit: c099fdd218a0fedfe87e0b88d2ba0667eab3b3c8
> change-id: 20240219-device_cleanup-coresight-00ba00fd5f21
> 
> Best regards,
diff mbox series

Patch

diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
index eb365236f9a9..ca3362cbdb70 100644
--- a/drivers/hwtracing/coresight/coresight-priv.h
+++ b/drivers/hwtracing/coresight/coresight-priv.h
@@ -13,7 +13,7 @@ 
 #include <linux/pm_runtime.h>
 
 extern struct mutex coresight_mutex;
-extern struct device_type coresight_dev_type[];
+extern const struct device_type coresight_dev_type[];
 
 /*
  * Coresight management registers (0xf00-0xfcc)
diff --git a/drivers/hwtracing/coresight/coresight-sysfs.c b/drivers/hwtracing/coresight/coresight-sysfs.c
index f9444e2cb1d9..1e67cc7758d7 100644
--- a/drivers/hwtracing/coresight/coresight-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-sysfs.c
@@ -377,7 +377,7 @@  static struct attribute *coresight_source_attrs[] = {
 };
 ATTRIBUTE_GROUPS(coresight_source);
 
-struct device_type coresight_dev_type[] = {
+const struct device_type coresight_dev_type[] = {
 	[CORESIGHT_DEV_TYPE_SINK] = {
 		.name = "sink",
 		.groups = coresight_sink_groups,