[PATCH v2] DRM: add drm gem cma helper

[Lars-Peter Clausen]

On 05/31/2012 10:08 AM, Sascha Hauer wrote:
> [...]
> diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c
b/drivers/gpu/drm/drm_gem_cma_helper.c
> new file mode 100644
> index 0000000..d8c0dc7
> --- /dev/null
> +++ b/drivers/gpu/drm/drm_gem_cma_helper.c
> @@ -0,0 +1,243 @@
> +/*
> + * drm gem cma (contiguous memory allocator) helper functions
> + *
> + * Copyright (C) 2012 Sascha Hauer, Pengutronix
> + *
> + * Based on Samsung Exynos code
> + *
> + * Copyright (c) 2011 Samsung Electronics Co., Ltd.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version 2
> + * of the License, or (at your option) any later version.
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +#include <drm/drmP.h>
> +#include <drm/drm.h>
> +#include <drm/drm_gem_cma_helper.h>

Sorry, forgot to mention this during the v1 review. This needs
'#include <linux/export.h>' for EXPORT_SYMBOL_GPL. I get compile errors
otherwise. Maybe it also makes sense to include linux/slab.h,
linux/dma-mapping.h, linux/mm.h and linux/mutex.h since those are only
implicitly included right now.

- Lars