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From:   Alex Deucher <alexdeucher@gmail.com>
Date:   Fri, 4 Dec 2020 15:56:13 -0500
Message-ID: <CADnq5_NBqx5U+JAxSAaUD6qwCmZsnCzGk1mF9=rkPRPm0Ug0yw@mail.gmail.com>
Subject: Re: [PATCH] drm/amdgpu: fw_attestation: fix unused function warning
To:     Arnd Bergmann <arnd@kernel.org>
Cc:     Alex Deucher <alexander.deucher@amd.com>,
        =?UTF-8?Q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Hawking Zhang <Hawking.Zhang@amd.com>,
        John Clements <john.clements@amd.com>,
        Maling list - DRI developers 
        <dri-devel@lists.freedesktop.org>,
        Lee Jones <lee.jones@linaro.org>,
        amd-gfx list <amd-gfx@lists.freedesktop.org>,
        Arnd Bergmann <arnd@arndb.de>,
        LKML <linux-kernel@vger.kernel.org>
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On Fri, Dec 4, 2020 at 11:51 AM Arnd Bergmann <arnd@kernel.org> wrote:
>
> From: Arnd Bergmann <arnd@arndb.de>
>
> Without debugfs, the compiler notices one function that is not used at
> all:
>
> drivers/gpu/drm/amd/amdgpu/amdgpu_fw_attestation.c:123:12: error: unused function 'amdgpu_is_fw_attestation_supported' [-Werror,-Wunused-function]
>
> In fact the static const amdgpu_fw_attestation_debugfs_ops structure is
> also unused here, but that warning is currently disabled.
>
> Removing the #ifdef check does the right thing and leads to all of this
> code to be dropped without warning.
>
> Fixes: 19ae333001b3 ("drm/amdgpu: added support for psp fw attestation")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Applied.  Thanks!

Alex

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_fw_attestation.c | 2 --
>  1 file changed, 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fw_attestation.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fw_attestation.c
> index e47bca1c7635..7c6e02e35573 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fw_attestation.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fw_attestation.c
> @@ -130,7 +130,6 @@ static int amdgpu_is_fw_attestation_supported(struct amdgpu_device *adev)
>
>  void amdgpu_fw_attestation_debugfs_init(struct amdgpu_device *adev)
>  {
> -#if defined(CONFIG_DEBUG_FS)
>         if (!amdgpu_is_fw_attestation_supported(adev))
>                 return;
>
> @@ -139,5 +138,4 @@ void amdgpu_fw_attestation_debugfs_init(struct amdgpu_device *adev)
>                             adev_to_drm(adev)->primary->debugfs_root,
>                             adev,
>                             &amdgpu_fw_attestation_debugfs_ops);
> -#endif
>  }
> --
> 2.27.0
>
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