sh: __user annotations for __get/__put_user().

This adds in some more __user annotations. These weren't being
handled properly in some of the __get_user and __put_user paths,
so tidy those up.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/page.h b/include/asm-sh/page.h
index 7464de4..011dfbe 100644
--- a/include/asm-sh/page.h
+++ b/include/asm-sh/page.h
@@ -60,6 +60,7 @@
 
 extern unsigned long shm_align_mask;
 extern unsigned long max_low_pfn, min_low_pfn;
+extern unsigned long memory_start, memory_end;
 
 #ifdef CONFIG_MMU
 extern void clear_page_slow(void *to);