This is needed for i686 which doesn't have futex_timed_wait_bitset.

commit 35df5a77f3ad2a35761631928440d2994a9e4bc5

Author: Carlos O'Donell <carlos@redhat.com>

Date:   Tue Jun 12 16:17:05 2018 -0400

    Fix fallback path in __pthread_mutex_timedlock ().

    Fix the typo in the fallback path in __pthread_mutex_timedlock ()

    whic hcalls lll_futex_timed_wait ().  This is only useful for cases

    where the patch is being backported to older distributions where

    only lll_futex_timed_wait () is available.

Index: glibc-2.17-c758a686/nptl/pthread_mutex_timedlock.c

===================================================================

--- glibc-2.17-c758a686.orig/nptl/pthread_mutex_timedlock.c

+++ glibc-2.17-c758a686/nptl/pthread_mutex_timedlock.c

@@ -272,7 +272,7 @@ pthread_mutex_timedlock (pthread_mutex_t

 	  /* Block using the futex.  */

 #if (!defined __ASSUME_FUTEX_CLOCK_REALTIME \

      || !defined lll_futex_timed_wait_bitset)

-	  lll_futex_timed wait (&mutex->__data.__lock, oldval,

+	  lll_futex_timed_wait (&mutex->__data.__lock, oldval,

 				&rt, PTHREAD_ROBUST_MUTEX_PSHARED (mutex));

 #else

 	  int err = lll_futex_timed_wait_bitset (&mutex->__data.__lock,