sysdeps/unix/sysv/linux/generic/bits/struct_stat.h is missing the conditionals to use bits/struct_stat_time64_helper.h in the __USE_TIME_BITS64 case. This means that platforms using linux/generic but with __TIMESIZE == 32 (i.e. csky and nios2, I think) get the wrong version of struct stat for 64-bit time, since the actual function implementations use struct __stat64_t64 which does use bits/struct_stat_time64_helper.h, so the type declared in the installed headers is inconsistent with the implementation.
Fixed on 2.37.