GRU Driver: export is_uv_system(), zap_page_range() & follow_page()

Exports needed by the GRU driver.
Signed-off-by: NJack Steiner <steiner@sgi.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/x86/kernel/genapic_64.c

@@ -99,3 +99,4 @@ int is_uv_system(void)
 {
 	return uv_system_type != UV_NONE;
 }
+EXPORT_SYMBOL_GPL(is_uv_system);

mm/memory.c

@@ -993,6 +993,7 @@ unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address,
 		tlb_finish_mmu(tlb, address, end);
 	return end;
 }
+EXPORT_SYMBOL_GPL(zap_page_range);
 
 /**
  * zap_vma_ptes - remove ptes mapping the vma
@@ -1110,6 +1111,7 @@ struct page *follow_page(struct vm_area_struct *vma, unsigned long address,
 	}
 	return page;
 }
+EXPORT_SYMBOL_GPL(follow_page);
 
 /* Can we do the FOLL_ANON optimization? */
 static inline int use_zero_page(struct vm_area_struct *vma)