hyperv: Remove unused union and structs

The union vmpacket_largest_possible_header and several structs have not
been used for a long time afaict - remove them.

Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://lore.kernel.org/r/20250311091634.494888-2-thorsten.blum@linux.dev
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20250311091634.494888-2-thorsten.blum@linux.dev>

Author: toblux

include/linux/hyperv.h

@@ -371,19 +371,6 @@ struct vmtransfer_page_packet_header {
 	struct vmtransfer_page_range ranges[];
 } __packed;
 
-struct vmgpadl_packet_header {
-	struct vmpacket_descriptor d;
-	u32 gpadl;
-	u32 reserved;
-} __packed;
-
-struct vmadd_remove_transfer_page_set {
-	struct vmpacket_descriptor d;
-	u32 gpadl;
-	u16 xfer_pageset_id;
-	u16 reserved;
-} __packed;
-
 /*
  * This structure defines a range in guest physical space that can be made to
  * look virtually contiguous.
@@ -394,30 +381,6 @@ struct gpa_range {
 	u64 pfn_array[];
 };
 
-/*
- * This is the format for an Establish Gpadl packet, which contains a handle by
- * which this GPADL will be known and a set of GPA ranges associated with it.
- * This can be converted to a MDL by the guest OS.  If there are multiple GPA
- * ranges, then the resulting MDL will be "chained," representing multiple VA
- * ranges.
- */
-struct vmestablish_gpadl {
-	struct vmpacket_descriptor d;
-	u32 gpadl;
-	u32 range_cnt;
-	struct gpa_range range[1];
-} __packed;
-
-/*
- * This is the format for a Teardown Gpadl packet, which indicates that the
- * GPADL handle in the Establish Gpadl packet will never be referenced again.
- */
-struct vmteardown_gpadl {
-	struct vmpacket_descriptor d;
-	u32 gpadl;
-	u32 reserved;	/* for alignment to a 8-byte boundary */
-} __packed;
-
 /*
  * This is the format for a GPA-Direct packet, which contains a set of GPA
  * ranges, in addition to commands and/or data.
@@ -429,25 +392,6 @@ struct vmdata_gpa_direct {
 	struct gpa_range range[1];
 } __packed;
 
-/* This is the format for a Additional Data Packet. */
-struct vmadditional_data {
-	struct vmpacket_descriptor d;
-	u64 total_bytes;
-	u32 offset;
-	u32 byte_cnt;
-	unsigned char data[1];
-} __packed;
-
-union vmpacket_largest_possible_header {
-	struct vmpacket_descriptor simple_hdr;
-	struct vmtransfer_page_packet_header xfer_page_hdr;
-	struct vmgpadl_packet_header gpadl_hdr;
-	struct vmadd_remove_transfer_page_set add_rm_xfer_page_hdr;
-	struct vmestablish_gpadl establish_gpadl_hdr;
-	struct vmteardown_gpadl teardown_gpadl_hdr;
-	struct vmdata_gpa_direct data_gpa_direct_hdr;
-};
-
 #define VMPACKET_DATA_START_ADDRESS(__packet)	\
 	(void *)(((unsigned char *)__packet) +	\
 	 ((struct vmpacket_descriptor)__packet)->offset8 * 8)