[PATCH 1/2] drm/ttm: add a way to bo_wait for either the last read or last write

[Thomas Hellstrom]

Oh, and one more style comment below:

On 08/07/2011 10:39 PM, Marek Olšák wrote:
>
> +enum ttm_buffer_usage {
> +    TTM_USAGE_READ = 1,
> +    TTM_USAGE_WRITE = 2,
> +    TTM_USAGE_READWRITE = TTM_USAGE_READ | TTM_USAGE_WRITE
> +};
>
>    

Please don't use enums for bit operations.

#define TTM_USAGE_FLAG_READ   (1 << 0)
#define TTM_USAGE_FLAG_WRITE  (1 << 1)

/Thomas