[PARISC] Fix compile warning caused by conflicting types of expand_upwards()

Fix compile warning caused by conflicting types of expand_upwards. IA64
requires it to not be static inline, as it's used outside mm/mmap.c

Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1013a42..0986d19 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -940,7 +940,9 @@
 
 /* Do stack extension */
 extern int expand_stack(struct vm_area_struct *vma, unsigned long address);
+#ifdef CONFIG_IA64
 extern int expand_upwards(struct vm_area_struct *vma, unsigned long address);
+#endif
 
 /* Look up the first VMA which satisfies  addr < vm_end,  NULL if none. */
 extern struct vm_area_struct * find_vma(struct mm_struct * mm, unsigned long addr);