On both i686 and armv7hl, TestProcStatLimits overflows:
# github.com/prometheus/procfs [github.com/prometheus/procfs.test]
./proc_stat_test.go:97:49: cannot use math.MinInt64 (untyped int constant -9223372036854775808) as int value in struct literal (overflows)
./proc_stat_test.go:98:51: cannot use math.MaxInt64 (untyped int constant 9223372036854775807) as int value in struct literal (overflows)
On both i686 and armv7hl, TestProcStatLimits overflows: