aio: ifdef fields in mm_struct

->ioctx_lock and ->ioctx_list are used only under CONFIG_AIO.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Zach Brown <zach.brown@oracle.com>
Cc: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 0042090a4d70..6b7029ab9c8e 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -259,11 +259,10 @@ struct mm_struct {
         unsigned long flags; /* Must use atomic bitops to access the bits */
 
         struct core_state *core_state; /* coredumping support */
-
-        /* aio bits */
+#ifdef CONFIG_AIO
         spinlock_t              ioctx_lock;
         struct hlist_head       ioctx_list;
-
+#endif
 #ifdef CONFIG_MM_OWNER
         /*
          * "owner" points to a task that is regarded as the canonical