i386/xen: Drop unused functions/variables/types

	- xen_xchg
	- __xchg_dummy
	_ __xg
	- __xchg

diff --git a/sys/i386/include/xen/xen-os.h b/sys/i386/include/xen/xen-os.h
index 9b9b63ff0a5888d5c03a840b50b45beb3f8e6da9..05ad5afdda2ac98f6585a4cbf0b0a5f6edd39029 100644 (file)
--- a/sys/i386/include/xen/xen-os.h
+++ b/sys/i386/include/xen/xen-os.h
@@ -57,36 +57,6 @@ static inline void rep_nop(void)
  */
 typedef struct { volatile int counter; } atomic_t;
 
-#define xen_xchg(ptr,v) \
-        ((__typeof__(*(ptr)))__xchg((unsigned long)(v),(ptr),sizeof(*(ptr))))
-struct __xchg_dummy { unsigned long a[100]; };
-#define __xg(x) ((volatile struct __xchg_dummy *)(x))
-static __inline unsigned long __xchg(unsigned long x, volatile void * ptr,
-                                   int size)
-{
-    switch (size) {
-    case 1:
-        __asm__ __volatile__("xchgb %b0,%1"
-                             :"=q" (x)
-                             :"m" (*__xg(ptr)), "0" (x)
-                             :"memory");
-        break;
-    case 2:
-        __asm__ __volatile__("xchgw %w0,%1"
-                             :"=r" (x)
-                             :"m" (*__xg(ptr)), "0" (x)
-                             :"memory");
-        break;
-    case 4:
-        __asm__ __volatile__("xchgl %0,%1"
-                             :"=r" (x)
-                             :"m" (*__xg(ptr)), "0" (x)
-                             :"memory");
-        break;
-    }
-    return x;
-}
-
 /**
  * test_and_clear_bit - Clear a bit and return its old value
  * @nr: Bit to set