[PATCH] fix remaining missing includes

Fix more include file problems that surfaced since I submitted the previous
fix-missing-includes.patch.  This should now allow not to include sched.h
from module.h, which is done by a followup patch.

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-sh/pgtable.h b/include/asm-sh/pgtable.h
index dee36bc..bb0efb3 100644
--- a/include/asm-sh/pgtable.h
+++ b/include/asm-sh/pgtable.h
@@ -284,6 +284,8 @@
 #define GET_IOSPACE(pfn)		0
 #define GET_PFN(pfn)			(pfn)
 
+struct mm_struct;
+
 /*
  * No page table caches to initialise
  */