linux-kernel - Re: [PATCH] drm/ttm: Dead code elimination & comment addition

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Date:	Mon, 16 Nov 2009 09:40:40 +1000
From:	Dave Airlie <airlied@...il.com>
To:	Jerome Glisse <jglisse@...hat.com>
Cc:	dri-devel@...ts.sf.net, linux-kernel@...r.kernel.org,
	thomas@...pmail.org
Subject: Re: [PATCH] drm/ttm: Dead code elimination & comment addition

On Fri, Nov 6, 2009 at 12:43 AM, Jerome Glisse <jglisse@...hat.com> wrote:
> Remove dead code in ttm_bo_handle_mem_move and add comment on
> what we are doing their and why.
>

I haven't seen Thomas's ACK on this? I'd like to keep TTM under his control ;-)

Dave.

> Signed-off-by: Jerome Glisse <jglisse@...hat.com>
> ---
>  drivers/gpu/drm/ttm/ttm_bo.c |   14 +++++---------
>  1 files changed, 5 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index 87c0625..aea4699 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -309,9 +309,8 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
>                ttm_bo_unmap_virtual(bo);
>
>        /*
> -        * Create and bind a ttm if required.
> +        * Create and bind a ttm if new placement is not on card memory.
>         */
> -
>        if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) {
>                ret = ttm_bo_add_ttm(bo, false);
>                if (ret)
> @@ -327,15 +326,12 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
>                                goto out_err;
>                }
>
> +               /* New placement is not on card and old placement is system
> +                * memory we can thus simply copy new placement informations
> +                */
>                if (bo->mem.mem_type == TTM_PL_SYSTEM) {
> -
> -                       struct ttm_mem_reg *old_mem = &bo->mem;
> -                       uint32_t save_flags = old_mem->placement;
> -
> -                       *old_mem = *mem;
> +                       bo->mem = *mem;
>                        mem->mm_node = NULL;
> -                       ttm_flag_masked(&save_flags, mem->placement,
> -                                       TTM_PL_MASK_MEMTYPE);
>                        goto moved;
>                }
>
> --
> 1.6.5.1
>
>
--
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