The member back in struct sched_rt_entity only related to RT_GROUP_SCHED,
it should not place out of RT_GROUP_SCHED, move back to RT_GROUP_SCHED.
It will save a few bytes.

Yajun Deng (2):
  sched/rt: Use 'back' only if CONFIG_RT_GROUP_SCHED is enabled
  sched/headers: Move sched_rt_entity::back to under the
    CONFIG_RT_GROUP_SCHED block

 include/linux/sched.h |  2 +-
 kernel/sched/rt.c     | 15 ++++++++++-----
 2 files changed, 11 insertions(+), 6 deletions(-)

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2.25.1