[Xen-devel] [PATCH] x86: make set_task_gate() x86-32-only

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

.. since x86-64 doesn't have task gates.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

Index: 2007-11-13/xen/arch/x86/traps.c
===================================================================
--- 2007-11-13.orig/xen/arch/x86/traps.c        2007-11-12 08:47:42.000000000 
+0100
+++ 2007-11-13/xen/arch/x86/traps.c     2007-11-13 15:30:41.000000000 +0100
@@ -2581,12 +2581,6 @@ void set_system_gate(unsigned int n, voi
     _set_gate(idt_table+n,14,3,addr);
 }
 
-void set_task_gate(unsigned int n, unsigned int sel)
-{
-    idt_table[n].a = sel << 16;
-    idt_table[n].b = 0x8500;
-}
-
 void set_tss_desc(unsigned int n, void *addr)
 {
     _set_tssldt_desc(
Index: 2007-11-13/xen/arch/x86/x86_32/traps.c
===================================================================
--- 2007-11-13.orig/xen/arch/x86/x86_32/traps.c 2007-11-02 17:25:57.000000000 
+0100
+++ 2007-11-13/xen/arch/x86/x86_32/traps.c      2007-11-13 15:31:07.000000000 
+0100
@@ -258,6 +258,12 @@ unsigned long do_iret(void)
     return 0;
 }
 
+static void set_task_gate(unsigned int n, unsigned int sel)
+{
+    idt_table[n].a = sel << 16;
+    idt_table[n].b = 0x8500;
+}
+
 void __devinit subarch_percpu_traps_init(void)
 {
     struct tss_struct *tss = &doublefault_tss;
Index: 2007-11-13/xen/include/asm-x86/desc.h
===================================================================
--- 2007-11-13.orig/xen/include/asm-x86/desc.h  2007-11-13 15:29:28.000000000 
+0100
+++ 2007-11-13/xen/include/asm-x86/desc.h       2007-11-13 15:31:27.000000000 
+0100
@@ -205,7 +205,6 @@ extern struct desc_struct compat_gdt_tab
 
 extern void set_intr_gate(unsigned int irq, void * addr);
 extern void set_system_gate(unsigned int n, void *addr);
-extern void set_task_gate(unsigned int n, unsigned int sel);
 extern void set_tss_desc(unsigned int n, void *addr);
 
 #endif /* !__ASSEMBLY__ */




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