Re: [RFC 1/8] mm: Define coherent device memory node

[Dave Hansen]

> +#ifdef CONFIG_COHERENT_DEVICE
> +#define node_cdm(nid)          (NODE_DATA(nid)->coherent_device)
> +#define set_cdm_isolation(nid) (node_cdm(nid) = 1)
> +#define clr_cdm_isolation(nid) (node_cdm(nid) = 0)
> +#define isolated_cdm_node(nid) (node_cdm(nid) == 1)
> +#else
> +#define set_cdm_isolation(nid) ()
> +#define clr_cdm_isolation(nid) ()
> +#define isolated_cdm_node(nid) (0)
> +#endif

FWIW, I think adding all this "cdm" gunk in the names is probably a bad
thing.

I can think of other memory types that are coherent, but
non-device-based that might want behavior like this.