[PATCH] x86/MSI: drop "packed" attribute from message data/address structures

[Jan Beulich]

The attribute has no purpose here and, in the worst case, could lead to
the compiler generating worse code. In practice, however: No change to
generated code (surprisingly not even to generated debug info), at least
with gcc12 and the .config-s I've tried.

Requested-by: Andrew Cooper <andrew.coop...@citrix.com>
Signed-off-by: Jan Beulich <jbeul...@suse.com>

--- a/xen/arch/x86/include/asm/msi.h
+++ b/xen/arch/x86/include/asm/msi.h
@@ -178,7 +178,7 @@ int msi_free_irq(struct msi_desc *entry)
  * MSI Defined Data Structures
  */
 
-struct __packed msg_data {
+struct msg_data {
     uint32_t vector        :  8;
     uint32_t delivery_mode :  3;    /* 000b: FIXED | 001b: lowest prior */
     uint32_t               :  3;
@@ -187,7 +187,7 @@ struct __packed msg_data {
     uint32_t               : 16;
 };
 
-struct __packed msg_address {
+struct msg_address {
     union {
         struct {
             uint32_t              :  2;