linux-kernel - Re: [PATCH] drm/amd/amdgpu: make undeclared variables static

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Date:   Wed, 23 Oct 2019 15:09:34 +0000
From:   Harry Wentland <hwentlan@....com>
To:     Wambui Karuga <wambui@...uga.xyz>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
CC:     "airlied@...ux.ie" <airlied@...ux.ie>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "outreachy-kernel@...glegroups.com" 
        <outreachy-kernel@...glegroups.com>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>
Subject: Re: [PATCH] drm/amd/amdgpu: make undeclared variables static

On 2019-10-19 3:24 a.m., Wambui Karuga wrote:
> Make the `amdgpu_lockup_timeout` and `amdgpu_exp_hw_support` variables
> static to remove the following sparse warnings:
> drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c:103:19: warning: symbol 'amdgpu_lockup_timeout' was not declared. Should it be static?

This should be declared in amdgpu.h. amdgpu is maintained on the
amd-staging-drm-next branch from
https://cgit.freedesktop.org/~agd5f/linux/?h=amd-staging-drm-next. Can
you check there?

> drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c:117:18: warning: symbol 'amdgpu_exp_hw_support' was not declared. Should it be static?
> 
> Signed-off-by: Wambui Karuga <wambui@...uga.xyz>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index 3fae1007143e..c5b3c0c9193b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -100,7 +100,7 @@ int amdgpu_disp_priority = 0;
>  int amdgpu_hw_i2c = 0;
>  int amdgpu_pcie_gen2 = -1;
>  int amdgpu_msi = -1;
> -char amdgpu_lockup_timeout[AMDGPU_MAX_TIMEOUT_PARAM_LENTH];
> +static char amdgpu_lockup_timeout[AMDGPU_MAX_TIMEOUT_PARAM_LENTH];
>  int amdgpu_dpm = -1;
>  int amdgpu_fw_load_type = -1;
>  int amdgpu_aspm = -1;
> @@ -114,7 +114,7 @@ int amdgpu_vm_block_size = -1;
>  int amdgpu_vm_fault_stop = 0;
>  int amdgpu_vm_debug = 0;
>  int amdgpu_vm_update_mode = -1;
> -int amdgpu_exp_hw_support = 0;
> +static int amdgpu_exp_hw_support;

This is indeed only used in this file but for consistency's sake it's
probably better to also declare it in amdgpu.h rather than make it
static here.

Harry

>  int amdgpu_dc = -1;
>  int amdgpu_sched_jobs = 32;
>  int amdgpu_sched_hw_submission = 2;
>