linux-kernel - Re: [PATCH v2 -next] drm/amdkfd: Fix -Wunused-const-variable warning

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Date:   Thu, 10 Sep 2020 10:32:22 -0400
From:   Felix Kuehling <felix.kuehling@....com>
To:     YueHaibing <yuehaibing@...wei.com>, alexander.deucher@....com,
        christian.koenig@....com, airlied@...ux.ie, daniel@...ll.ch,
        Yong.Zhao@....com, ray.huang@....com
Cc:     amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 -next] drm/amdkfd: Fix -Wunused-const-variable warning

Am 2020-09-10 um 3:50 a.m. schrieb YueHaibing:
> If KFD_SUPPORT_IOMMU_V2 is not set, gcc warns:
>
> drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_device.c:121:37: warning: ‘raven_device_info’ defined but not used [-Wunused-const-variable=]
>  static const struct kfd_device_info raven_device_info = {
>                                      ^~~~~~~~~~~~~~~~~
>
> As Huang Rui suggested, Raven already has the fallback path,
> so it should be out of IOMMU v2 flag.
>
> Suggested-by: Huang Rui <ray.huang@....com>
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>

Reviewed-by: Felix Kuehling <Felix.Kuehling@....com>

I applied your patch to the amd-staging-drm-next branch.

Thank you,
  Felix

> ---
>  drivers/gpu/drm/amd/amdkfd/kfd_device.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> index 0e71a0543f98..e3fc6ed7b79c 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> @@ -503,8 +503,8 @@ static const struct kfd_device_info *kfd_supported_devices[][2] = {
>  #ifdef KFD_SUPPORT_IOMMU_V2
>  	[CHIP_KAVERI] = {&kaveri_device_info, NULL},
>  	[CHIP_CARRIZO] = {&carrizo_device_info, NULL},
> -	[CHIP_RAVEN] = {&raven_device_info, NULL},
>  #endif
> +	[CHIP_RAVEN] = {&raven_device_info, NULL},
>  	[CHIP_HAWAII] = {&hawaii_device_info, NULL},
>  	[CHIP_TONGA] = {&tonga_device_info, NULL},
>  	[CHIP_FIJI] = {&fiji_device_info, &fiji_vf_device_info},