Allow host controllers to store private data per device.

Signed-off-by:  Kristen Carlson Accardi <kristen.c.accardi@intel.com>

---
 include/linux/libata.h |    3 +++
 1 file changed, 3 insertions(+)

Index: libata-dev/include/linux/libata.h
===================================================================
--- libata-dev.orig/include/linux/libata.h	2007-09-24 16:13:33.000000000 -0700
+++ libata-dev/include/linux/libata.h	2007-09-24 16:15:24.000000000 -0700
@@ -474,6 +474,9 @@ struct ata_device {
 	/* error history */
 	struct ata_ering	ering;
 	int			spdn_cnt;
+
+	/* controller driver per device private data */
+	void 			*private_data;
 };
 
 /* Offset into struct ata_device.  Fields above it are maintained
-
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