Fix MSPEC driver to build for non SN2 enabled configs as the driver
should work in cached and uncached modes (no fetchop) on these systems.
In addition make MSPEC select IA64_UNCACHED_ALLOCATOR, which is required
for it.

Signed-off-by: Jes Sorensen <jes@sgi.com>

---
 drivers/char/Kconfig        |    1 +
 drivers/char/mspec.c        |    8 +++++++-
 include/asm-ia64/sn/addrs.h |    6 +++++-
 3 files changed, 13 insertions(+), 2 deletions(-)

Index: linux-2.6/drivers/char/Kconfig
===================================================================
--- linux-2.6.orig/drivers/char/Kconfig
+++ linux-2.6/drivers/char/Kconfig
@@ -412,6 +412,7 @@ config SGI_MBCS
 config MSPEC
 	tristate "Memory special operations driver"
 	depends on IA64
+	select IA64_UNCACHED_ALLOCATOR
 	help
 	  If you have an ia64 and you want to enable memory special
 	  operations support (formerly known as fetchop), say Y here,
Index: linux-2.6/drivers/char/mspec.c
===================================================================
--- linux-2.6.orig/drivers/char/mspec.c
+++ linux-2.6/drivers/char/mspec.c
@@ -72,7 +72,11 @@ enum {
 	MSPEC_UNCACHED
 };
 
+#ifdef CONFIG_SGI_SN
 static int is_sn2;
+#else
+#define is_sn2		0
+#endif
 
 /*
  * One of these structures is allocated when an mspec region is mmaped. The
@@ -211,7 +215,7 @@ mspec_nopfn(struct vm_area_struct *vma, 
 	if (vdata->type == MSPEC_FETCHOP)
 		paddr = TO_AMO(maddr);
 	else
-		paddr = __pa(TO_CAC(maddr));
+		paddr = maddr & ~__IA64_UNCACHED_OFFSET;
 
 	pfn = paddr >> PAGE_SHIFT;
 
@@ -335,6 +339,7 @@ mspec_init(void)
 	 * The fetchop device only works on SN2 hardware, uncached and cached
 	 * memory drivers should both be valid on all ia64 hardware
 	 */
+#ifdef CONFIG_SGI_SN
 	if (ia64_platform_is("sn2")) {
 		is_sn2 = 1;
 		if (is_shub2()) {
@@ -363,6 +368,7 @@ mspec_init(void)
 			goto free_scratch_pages;
 		}
 	}
+#endif
 	ret = misc_register(&cached_miscdev);
 	if (ret) {
 		printk(KERN_ERR "%s: failed to register device %i\n",
Index: linux-2.6/include/asm-ia64/sn/addrs.h
===================================================================
--- linux-2.6.orig/include/asm-ia64/sn/addrs.h
+++ linux-2.6/include/asm-ia64/sn/addrs.h
@@ -136,9 +136,13 @@
  */
 #define TO_PHYS(x)		(TO_PHYS_MASK & (x))
 #define TO_CAC(x)		(CAC_BASE     | TO_PHYS(x))
+#ifdef CONFIG_SGI_SN
 #define TO_AMO(x)		(AMO_BASE     | TO_PHYS(x))
 #define TO_GET(x)		(GET_BASE     | TO_PHYS(x))
-
+#else
+#define TO_AMO(x)		({ BUG(); x; })
+#define TO_GET(x)		({ BUG(); x; })
+#endif
 
 /*
  * Covert from processor physical address to II/TIO physical address: