1 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/hdreg.h b/include/linux/hdreg.h
index 3bcb88560418..df17bf767d98 100644
--- a/include/linux/hdreg.h
+++ b/include/linux/hdreg.h
@@ -117,7 +117,7 @@ typedef union ide_reg_valid_s {
 
 typedef struct ide_task_request_s {
         __u8            io_ports[8];
-        __u8            hob_ports[8];
+        __u8            hob_ports[8]; /* bytes 6 and 7 are unused */
         ide_reg_valid_t out_flags;
         ide_reg_valid_t in_flags;
         int             data_phase;
@@ -139,6 +139,7 @@ struct hd_drive_cmd_hdr {
         __u8 sector_count;
 };
 
+#ifndef __KERNEL__
 typedef struct hd_drive_task_hdr {
         __u8 data;
         __u8 feature;
@@ -160,6 +161,7 @@ typedef struct hd_drive_hob_hdr {
         __u8 device_head;
         __u8 control;
 } hob_struct_t;
+#endif
 
 #define TASKFILE_INVALID                0x7fff
 #define TASKFILE_48                     0x8000