Shrink task_struct if CONFIG_FUTEX=n

robust_list, compat_robust_list, pi_state_list, pi_state_cache are
really used if futexes are on.

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 8a97e92c604f..3e764f6f2be1 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1156,13 +1156,14 @@ static struct task_struct *copy_process(unsigned long clone_flags,
          * Clear TID on mm_release()?
          */
         p->clear_child_tid = (clone_flags & CLONE_CHILD_CLEARTID) ? child_tidptr: NULL;
+#ifdef CONFIG_FUTEX
         p->robust_list = NULL;
 #ifdef CONFIG_COMPAT
         p->compat_robust_list = NULL;
 #endif
         INIT_LIST_HEAD(&p->pi_state_list);
         p->pi_state_cache = NULL;
-
+#endif
         /*
          * sigaltstack should be cleared when sharing the same VM
          */