Re: [PATCH] drm/i915: make i915_drm_client_fdinfo() reference conditional again

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Hi Arnd,

On Fri, Jun 16, 2023 at 11:31:47AM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
> 
> The function is only defined if CONFIG_PROC_FS is enabled:
> 
> ld.lld: error: undefined symbol: i915_drm_client_fdinfo
> >>> referenced by i915_driver.c
> >>>               drivers/gpu/drm/i915/i915_driver.o:(i915_drm_driver) in archive vmlinux.a
> 
> Use the PTR_IF() helper to make the reference NULL otherwise.
> 
> Fixes: e894b724c316d ("drm/i915: Use the fdinfo helper")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
>  drivers/gpu/drm/i915/i915_driver.c     | 2 +-
>  drivers/gpu/drm/i915/i915_drm_client.h | 2 --
>  2 files changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
> index 75cbc43b326dd..0ad0c5885ec27 100644
> --- a/drivers/gpu/drm/i915/i915_driver.c
> +++ b/drivers/gpu/drm/i915/i915_driver.c
> @@ -1816,7 +1816,7 @@ static const struct drm_driver i915_drm_driver = {
>  	.open = i915_driver_open,
>  	.lastclose = i915_driver_lastclose,
>  	.postclose = i915_driver_postclose,
> -	.show_fdinfo = i915_drm_client_fdinfo,
> +	.show_fdinfo = PTR_IF(IS_ENABLED(CONFIG_PROC_FS), i915_drm_client_fdinfo),
>  
>  	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
>  	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> diff --git a/drivers/gpu/drm/i915/i915_drm_client.h b/drivers/gpu/drm/i915/i915_drm_client.h
> index 4c18b99e10a4e..67816c912bca1 100644
> --- a/drivers/gpu/drm/i915/i915_drm_client.h
> +++ b/drivers/gpu/drm/i915/i915_drm_client.h
> @@ -47,8 +47,6 @@ static inline void i915_drm_client_put(struct i915_drm_client *client)
>  
>  struct i915_drm_client *i915_drm_client_alloc(void);
>  
> -#ifdef CONFIG_PROC_FS
>  void i915_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file);
> -#endif

nice! This is becoming the new trend now.

Reviewed-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx> 

Andi



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