Unify GDT selector naming convention

xtoskrnl/ar/amd64/boot.S

@@ -46,7 +46,7 @@ ArEnableExtendedPhysicalAddressing:
     leaq XpaEnterLongMode(%rip), %rbx
 
     /* Push the 32-bit code segment selector and the target address for a far jump */
-    pushq $GDT_R0_CMCODE
+    pushq $KGDT_R0_CMCODE
     pushq %rax
 
     /* Perform a far return to switch to 32-bit compatibility mode */
@@ -60,7 +60,7 @@ XpaEnterCompatMode:
     pushl %ecx
 
     /* Set the stack segment to the 32-bit data segment selector */
-    movl $GDT_R0_DATA, %eax
+    movl $KGDT_R0_DATA, %eax
     movl %eax, %ss
 
     /* Disable PGE and PCIDE to ensure all TLB entries will be flushed */
@@ -100,7 +100,7 @@ XpaEnterCompatMode:
 
 XpaFlushInstructions:
     /* Push the 64-bit code segment selector and the target address for a far jump */
-    pushl $GDT_R0_CODE
+    pushl $KGDT_R0_CODE
     pushl %ebx
 
     /* Perform a far return to switch to 64-bit long mode */

xtoskrnl/includes/ar/amd64/asmsup.h

@@ -17,9 +17,9 @@
 #define CR4_PCIDE                               0x00020000
 
 /* GDT selectors */
-#define GDT_R0_CMCODE                           0x08
-#define GDT_R0_CODE                             0x10
-#define GDT_R0_DATA                             0x18
+#define KGDT_R0_CMCODE                          0x08
+#define KGDT_R0_CODE                            0x10
+#define KGDT_R0_DATA                            0x18
 
 /* MSR registers */
 #define X86_MSR_EFER                            0xC0000080