linux-kernel - Re: linux-next: build failure after merge of the drm-misc tree

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Message-ID: <20240212122513.062a3b35@canb.auug.org.au>
Date: Mon, 12 Feb 2024 12:25:13 +1100
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Daniel Vetter <daniel.vetter@...ll.ch>
Cc: Christian König <christian.koenig@....com>, Somalapuram
 Amaranath <Amaranath.Somalapuram@....com>, Intel Graphics
 <intel-gfx@...ts.freedesktop.org>, DRI <dri-devel@...ts.freedesktop.org>,
 Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linux Next
 Mailing List <linux-next@...r.kernel.org>, Dave Airlie <airlied@...hat.com>
Subject: Re: linux-next: build failure after merge of the drm-misc tree

Hi all,

On Tue, 6 Feb 2024 15:28:50 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> After merging the drm-misc tree, today's linux-next build (i386 defconfig)
> failed like this:
> 
> In function 'i915_ttm_placement_from_obj',
>     inlined from 'i915_ttm_get_pages' at drivers/gpu/drm/i915/gem/i915_gem_ttm.c:847:2:
> drivers/gpu/drm/i915/gem/i915_gem_ttm.c:165:18: error: 'places[0].flags' is used uninitialized [-Werror=uninitialized]
>   165 |         places[0].flags |= TTM_PL_FLAG_DESIRED;
>       |         ~~~~~~~~~^~~~~~
> drivers/gpu/drm/i915/gem/i915_gem_ttm.c: In function 'i915_ttm_get_pages':
> drivers/gpu/drm/i915/gem/i915_gem_ttm.c:837:26: note: 'places' declared here
>   837 |         struct ttm_place places[I915_TTM_MAX_PLACEMENTS + 1];
>       |                          ^~~~~~
> 
> Caused by commit
> 
>   a78a8da51b36 ("drm/ttm: replace busy placement with flags v6")
> 
> I applied the following hack for today:
> 
> From: Stephen Rothwell <sfr@...b.auug.org.au>
> Date: Tue, 6 Feb 2024 15:17:54 +1100
> Subject: [PATCH] drm/ttm: initialise places
> 
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> ---
>  drivers/gpu/drm/i915/gem/i915_gem_ttm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> index 80c6cafc8887..34e699e67c25 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_ttm.c
> @@ -834,7 +834,7 @@ static int __i915_ttm_get_pages(struct drm_i915_gem_object *obj,
>  
>  static int i915_ttm_get_pages(struct drm_i915_gem_object *obj)
>  {
> -	struct ttm_place places[I915_TTM_MAX_PLACEMENTS + 1];
> +	struct ttm_place places[I915_TTM_MAX_PLACEMENTS + 1] = {};
>  	struct ttm_placement placement;
>  
>  	/* restricted by sg_alloc_table */
> -- 
> 2.43.0

I am still applying the above patch :-(

-- 
Cheers,
Stephen Rothwell

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