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

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Message-ID: <20200910075318.GA2592322@hr-amd>
Date:   Thu, 10 Sep 2020 15:53:18 +0800
From:   Huang Rui <ray.huang@....com>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     "Kuehling, Felix" <Felix.Kuehling@....com>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "Yong.Zhao@....com" <Yong.Zhao@....com>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 -next] drm/amdkfd: Fix -Wunused-const-variable warning

On Thu, Sep 10, 2020 at 03:50:06PM +0800, YueHaibing wrote:
> 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>

Acked-by: Huang Rui <ray.huang@....com>

> ---
>  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},
> -- 
> 2.17.1
> 
>