It's not the best place for this function:
- pelt.h header file is included below but cfs_rq_is_decayed() uses PELT
- CONFIG_SMP is already defined few lines below
- cfs_rq_is_decayed() is only used with CONFIG_FAIR_GROUP_SCHED and
now with CONFIG_CFS_BANDWIDTH which depends on the former

so moving cfs_rq_is_decayed() just above update_tg_load_avg() with
other functions used for propagating and updating tg load seems a
better place

Ack. When looking at it now, your suggestion makes more sense. Will fix it.

Thanks
Odin