On Thu, Jan 10, 2013 at 04:40:19PM -0700, Toshi Kani wrote:

+/*
+ * Hot-plug device information
+ */

Again, stop it with the "generic" hotplug term here, and everywhere
else.  You are doing a very _specific_ type of hotplug devices, so spell
it out.  We've worked hard to hotplug _everything_ in Linux, you are
going to confuse a lot of people with this type of terms.

+union shp_dev_info {
+	struct shp_cpu {
+		u32		cpu_id;
+	} cpu;

What is this?  Why not point to the system device for the cpu?

+	struct shp_memory {
+		int		node;
+		u64		start_addr;
+		u64		length;
+	} mem;

Same here, why not point to the system device?

+	struct shp_hostbridge {
+	} hb;
+
+	struct shp_node {
+	} node;

What happened here with these?  Empty structures?  Huh?

+};
+
+struct shp_device {
+	struct list_head	list;
+	struct device		*device;

No, make it a "real" device, embed the device into it.

But, again, I'm going to ask why you aren't using the existing cpu /
memory / bridge / node devices that we have in the kernel.  Please use
them, or give me a _really_ good reason why they will not work.

+	enum shp_class		class;
+	union shp_dev_info	info;
+};
+
+/*
+ * Hot-plug request
+ */
+struct shp_request {
+	/* common info */
+	enum shp_operation	operation;	/* operation */
+
+	/* hot-plug event info: only valid for hot-plug operations */
+	void			*handle;	/* FW handle */
+	u32			event;		/* FW event */

What is this?

greg k-h