[Nouveau] [PATCH 1/1] vga_switcheroo: Constify vga_switcheroo_handler

[Christian König]

On 18.10.2015 13:05, Lukas Wunner wrote:
> vga_switcheroo_client_ops has always been declared const since its
> introduction with 26ec685ff9d9 ("vga_switcheroo: Introduce struct
> vga_switcheroo_client_ops").
>
> Do so for vga_switcheroo_handler as well.
>
>   drivers/gpu/drm/amd/amdgpu/amdgpu.ko:
>     6 .rodata       00009888
> - 19 .data         00001f00
> + 19 .data         00001ee0
>   drivers/gpu/drm/nouveau/nouveau.ko:
>     6 .rodata       000460b8
>    17 .data         00018fe0
>   drivers/gpu/drm/radeon/radeon.ko:
> -  7 .rodata       00030944
> +  7 .rodata       00030964
> - 21 .data         0000d6a0
> + 21 .data         0000d678
>   drivers/platform/x86/apple-gmux.ko:
> -  7 .rodata       00000140
> +  7 .rodata       00000160
> - 11 .data         000000e0
> + 11 .data         000000b8
>
> Cc: Ben Skeggs <bskeggs at redhat.com>
> Cc: Darren Hart <dvhart at linux.intel.com>
> Cc: Alex Deucher <alexander.deucher at amd.com>
> Signed-off-by: Lukas Wunner <lukas at wunner.de>

Looks like it makes sense and at least I don't need this split up 
between drivers.

Patch is Reviewed-by: Christian König <christian.koenig at amd.com>.

Regards,
Christian.

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c | 2 +-
>   drivers/gpu/drm/nouveau/nouveau_acpi.c           | 2 +-
>   drivers/gpu/drm/radeon/radeon_atpx_handler.c     | 2 +-
>   drivers/gpu/vga/vga_switcheroo.c                 | 4 ++--
>   drivers/platform/x86/apple-gmux.c                | 2 +-
>   include/linux/vga_switcheroo.h                   | 4 ++--
>   6 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
> index 3f7aaa4..dc565a4 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c
> @@ -501,7 +501,7 @@ static int amdgpu_atpx_get_client_id(struct pci_dev *pdev)
>   		return VGA_SWITCHEROO_DIS;
>   }
>   
> -static struct vga_switcheroo_handler amdgpu_atpx_handler = {
> +static const struct vga_switcheroo_handler amdgpu_atpx_handler = {
>   	.switchto = amdgpu_atpx_switchto,
>   	.power_state = amdgpu_atpx_power_state,
>   	.init = amdgpu_atpx_init,
> diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
> index df2d981..8b8332e 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
> @@ -206,7 +206,7 @@ static int nouveau_dsm_get_client_id(struct pci_dev *pdev)
>   	return VGA_SWITCHEROO_DIS;
>   }
>   
> -static struct vga_switcheroo_handler nouveau_dsm_handler = {
> +static const struct vga_switcheroo_handler nouveau_dsm_handler = {
>   	.switchto = nouveau_dsm_switchto,
>   	.power_state = nouveau_dsm_power_state,
>   	.get_client_id = nouveau_dsm_get_client_id,
> diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c
> index 8bc7d0b..714508a 100644
> --- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c
> +++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c
> @@ -499,7 +499,7 @@ static int radeon_atpx_get_client_id(struct pci_dev *pdev)
>   		return VGA_SWITCHEROO_DIS;
>   }
>   
> -static struct vga_switcheroo_handler radeon_atpx_handler = {
> +static const struct vga_switcheroo_handler radeon_atpx_handler = {
>   	.switchto = radeon_atpx_switchto,
>   	.power_state = radeon_atpx_power_state,
>   	.init = radeon_atpx_init,
> diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
> index af0d372..56bbbd6 100644
> --- a/drivers/gpu/vga/vga_switcheroo.c
> +++ b/drivers/gpu/vga/vga_switcheroo.c
> @@ -140,7 +140,7 @@ struct vgasr_priv {
>   	int registered_clients;
>   	struct list_head clients;
>   
> -	struct vga_switcheroo_handler *handler;
> +	const struct vga_switcheroo_handler *handler;
>   };
>   
>   #define ID_BIT_AUDIO		0x100
> @@ -195,7 +195,7 @@ static void vga_switcheroo_enable(void)
>    *
>    * Return: 0 on success, -EINVAL if a handler was already registered.
>    */
> -int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler)
> +int vga_switcheroo_register_handler(const struct vga_switcheroo_handler *handler)
>   {
>   	mutex_lock(&vgasr_mutex);
>   	if (vgasr_priv.handler) {
> diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
> index 0dec3f5..976efeb 100644
> --- a/drivers/platform/x86/apple-gmux.c
> +++ b/drivers/platform/x86/apple-gmux.c
> @@ -346,7 +346,7 @@ gmux_active_client(struct apple_gmux_data *gmux_data)
>   	return VGA_SWITCHEROO_DIS;
>   }
>   
> -static struct vga_switcheroo_handler gmux_handler = {
> +static const struct vga_switcheroo_handler gmux_handler = {
>   	.switchto = gmux_switchto,
>   	.power_state = gmux_set_power_state,
>   	.get_client_id = gmux_get_client_id,
> diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h
> index c557511..786bc93 100644
> --- a/include/linux/vga_switcheroo.h
> +++ b/include/linux/vga_switcheroo.h
> @@ -137,7 +137,7 @@ int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
>   void vga_switcheroo_client_fb_set(struct pci_dev *dev,
>   				  struct fb_info *info);
>   
> -int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler);
> +int vga_switcheroo_register_handler(const struct vga_switcheroo_handler *handler);
>   void vga_switcheroo_unregister_handler(void);
>   
>   int vga_switcheroo_process_delayed_switch(void);
> @@ -155,7 +155,7 @@ static inline void vga_switcheroo_unregister_client(struct pci_dev *dev) {}
>   static inline int vga_switcheroo_register_client(struct pci_dev *dev,
>   		const struct vga_switcheroo_client_ops *ops, bool driver_power_control) { return 0; }
>   static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_info *info) {}
> -static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
> +static inline int vga_switcheroo_register_handler(const struct vga_switcheroo_handler *handler) { return 0; }
>   static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
>   	const struct vga_switcheroo_client_ops *ops,
>   	enum vga_switcheroo_client_id id) { return 0; }