4 files changed, 5 insertions, 3 deletions
diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h
index f98b250402..fb3ca34131 100644
--- a/MdePkg/Include/Library/BaseLib.h
+++ b/MdePkg/Include/Library/BaseLib.h
@@ -25,7 +25,7 @@
 //
 // SPIN_LOCK
 //
-typedef UINTN                       SPIN_LOCK;
+typedef volatile UINTN              SPIN_LOCK;
 
 #if   defined (MDE_CPU_IA32)
 //
diff --git a/MdePkg/Include/Protocol/IP4.h b/MdePkg/Include/Protocol/IP4.h
index 0decc176d4..5a6ab5976b 100644
--- a/MdePkg/Include/Protocol/IP4.h
+++ b/MdePkg/Include/Protocol/IP4.h
@@ -28,6 +28,7 @@
 typedef struct _EFI_IP4_PROTOCOL EFI_IP4_PROTOCOL;
   
 typedef struct {
+  EFI_HANDLE              InstanceHandle;
   EFI_IPv4_ADDRESS        Ip4Address;
   EFI_IPv4_ADDRESS        SubnetMask;
 } EFI_IP4_ADDRESS_PAIR; 
diff --git a/MdePkg/Include/Protocol/Mtftp4.h b/MdePkg/Include/Protocol/Mtftp4.h
index 9c0e0734b7..18ae20bc4b 100644
--- a/MdePkg/Include/Protocol/Mtftp4.h
+++ b/MdePkg/Include/Protocol/Mtftp4.h
@@ -24,7 +24,7 @@
 
 #define EFI_MTFTP4_PROTOCOL_GUID \
   { \
-    0x3ad9df29, 0x4501, 0x478d, {0xb1, 0xf8, 0x7f, 0x7f, 0xe7, 0x0e, 0x50, 0xf3 } \
+    0x78247c57, 0x63db, 0x4708, {0x99, 0xc2, 0xa8, 0xb4, 0xa9, 0xa6, 0x1f, 0x6b } \
   }
 
 typedef struct _EFI_MTFTP4_PROTOCOL EFI_MTFTP4_PROTOCOL;
diff --git a/MdePkg/Include/Protocol/Tcp4.h b/MdePkg/Include/Protocol/Tcp4.h
index 11354b577e..8c22ef2096 100644
--- a/MdePkg/Include/Protocol/Tcp4.h
+++ b/MdePkg/Include/Protocol/Tcp4.h
@@ -33,6 +33,7 @@
 typedef struct _EFI_TCP4_PROTOCOL EFI_TCP4_PROTOCOL;
 
 typedef struct {
+  EFI_HANDLE        InstanceHandle;
   EFI_IPv4_ADDRESS        LocalAddress;
   UINT16                  LocalPort;
   EFI_IPv4_ADDRESS        RemoteAddress;
@@ -41,7 +42,7 @@ typedef struct {
 
 typedef struct {
   EFI_HANDLE              DriverHandle;
-  UINTN                   ServiceCount;
+  UINT32                  ServiceCount;
   EFI_TCP4_SERVICE_POINT  Services[1];
 } EFI_TCP4_VARIABLE_DATA;