SGI IA64 UV: fix ia64 build error in the linux-next tree

Fix the ia64 build error that occurs in the linux-next tree by introducing
an ia64 version of uv.h.

Additionally, clean up the usage of is_uv_system().
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/ia64/include/asm/uv/uv.h

+#ifndef _ASM_IA64_UV_UV_H
+#define _ASM_IA64_UV_UV_H
+
+#include <asm/system.h>
+#include <asm/sn/simulator.h>
+
+static inline int is_uv_system(void)
+{
+	/* temporary support for running on hardware simulator */
+	return IS_MEDUSA() || ia64_platform_is("uv");
+}
+
+#endif	/* _ASM_IA64_UV_UV_H */

drivers/misc/sgi-gru/gru.h

@@ -19,8 +19,6 @@
 #ifndef __GRU_H__
 #define __GRU_H__
 
-#include <asm/uv/uv.h>
-
 /*
  * GRU architectural definitions
  */

drivers/misc/sgi-gru/grufile.c

@@ -36,23 +36,11 @@
 #include <linux/interrupt.h>
 #include <linux/proc_fs.h>
 #include <linux/uaccess.h>
+#include <asm/uv/uv.h>
 #include "gru.h"
 #include "grulib.h"
 #include "grutables.h"
 
-#if defined CONFIG_X86_64
-#include <asm/genapic.h>
-#include <asm/irq.h>
-#define IS_UV()		is_uv_system()
-#elif defined CONFIG_IA64
-#include <asm/system.h>
-#include <asm/sn/simulator.h>
-/* temp support for running on hardware simulator */
-#define IS_UV()		IS_MEDUSA() || ia64_platform_is("uv")
-#else
-#define IS_UV()		0
-#endif
-
 #include <asm/uv/uv_hub.h>
 #include <asm/uv/uv_mmrs.h>
 
@@ -381,7 +369,7 @@ static int __init gru_init(void)
 	char id[10];
 	void *gru_start_vaddr;
 
-	if (!IS_UV())
+	if (!is_uv_system())
 		return 0;
 
 #if defined CONFIG_IA64
@@ -451,7 +439,7 @@ static void __exit gru_exit(void)
 	int order = get_order(sizeof(struct gru_state) *
 			      GRU_CHIPLETS_PER_BLADE);
 
-	if (!IS_UV())
+	if (!is_uv_system())
 		return;
 
 	for (i = 0; i < GRU_CHIPLETS_PER_BLADE; i++)

drivers/misc/sgi-xp/xp.h

@@ -15,21 +15,19 @@
 
 #include <linux/mutex.h>
 
+#if defined CONFIG_X86_UV || defined CONFIG_IA64_SGI_UV
 #include <asm/uv/uv.h>
+#define is_uv()		is_uv_system()
+#endif
+
+#ifndef is_uv
+#define is_uv()		0
+#endif
 
-#ifdef CONFIG_IA64
+#if defined CONFIG_IA64
 #include <asm/system.h>
 #include <asm/sn/arch.h>	/* defines is_shub1() and is_shub2() */
 #define is_shub()	ia64_platform_is("sn2")
-#ifdef CONFIG_IA64_SGI_UV
-#define is_uv()		ia64_platform_is("uv")
-#else
-#define is_uv()		0
-#endif
-#endif
-#ifdef CONFIG_X86_64
-#include <asm/genapic.h>
-#define is_uv()		is_uv_system()
 #endif
 
 #ifndef is_shub1
@@ -44,10 +42,6 @@
 #define is_shub()	0
 #endif
 
-#ifndef is_uv
-#define is_uv()		0
-#endif
-
 #ifdef USE_DBUG_ON
 #define DBUG_ON(condition)	BUG_ON(condition)
 #else