From: Julien Grall <julien.grall@citrix.com>
Date: Sat, 10 Oct 2015 21:04:41 +0000 (+0100)
Subject: i386/xen: Drop unused functions/variables/types
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=d13695103ddac672c2b857ff37d624dea50d346d;p=people%2Fjulieng%2Ffreebsd.git

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 9b9b63ff0a58..05ad5afdda2a 100644
--- 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