Build fails with my config because struct runqueue def was
moved from sched.c to sched.h, but not completely -- small
portion inside #ifdef CONFIG_SCHEDSTATS was dropped.
I fixed this myself, but now got another error:
drivers/dump/dump_overlay.c: In function
drivers/dump/dump_overlay.c:791: error: structure has
no member named `count'
I think it's due to similar matter.