2 include/linux/spinlock_rt.h:115:9: error: ‘return’ with a value, in function returning void [-Werror=return-type]
   2 include/linux/spinlock_rt.h:115:9: error: expected expression before ‘do’
   4 include/linux/minmax.h:20:35: warning: comparison of distinct pointer types lacks a cast
   1 cc1: some warnings being treated as errors