[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-ppc64/pgtable.h b/include/asm-ppc64/pgtable.h
index fde93ec..a9783ba 100644
--- a/include/asm-ppc64/pgtable.h
+++ b/include/asm-ppc64/pgtable.h
@@ -13,6 +13,7 @@
 #include <asm/mmu.h>
 #include <asm/page.h>
 #include <asm/tlbflush.h>
+struct mm_struct;
 #endif /* __ASSEMBLY__ */
 
 #ifdef CONFIG_PPC_64K_PAGES