Re: [RFC PATCH] DRM: amd: powerplay: don't undef pr_warn() {causes ARC build errors}

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On Mon, 2020-10-05 at 21:50 -0700, Randy Dunlap wrote:
> From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> 
> arch/arc/ implements BUG_ON() with BUG(). ARC has its own BUG()
> function and that function uses pr_warn() as part of its implementation.
> 
> Several (8) files in amd/powerplay/ #undef various pr_xyz() functions so
> that they won't be used by these drivers, since dev_() functions are
> preferred here and the #undefs make the pr_() functions unavailable.
[]
> --- lnx-59-rc7.orig/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> +++ lnx-59-rc7/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> @@ -52,7 +52,7 @@
>   * They are more MGPU friendly.
>   */
>  #undef pr_err
> -#undef pr_warn
> +//#undef pr_warn
>  #undef pr_info
>  #undef pr_debug
>  
> --- lnx-59-rc7.orig/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
> +++ lnx-59-rc7/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
> @@ -54,7 +54,7 @@
>   * They are more MGPU friendly.
>   */
>  #undef pr_err
> -#undef pr_warn
> +//#undef pr_warn
>  #undef pr_info
>  #undef pr_debug 

These are bad ideas as all of these pr_<level> entries
may become functions in a near-term future.


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