Author :
cheloha
Date :
2020-06-22 18:25:57
Hash :bf2d84a0 Message :inittodr(9): introduce dedicated flag to enable writes from resettodr(9)
We don't want resettodr(9) to write the RTC until inittodr(9) has
actually run. Until inittodr(9) calls tc_setclock() the system UTC
clock will contain a meaningless value and there's no sense in
overwriting a good value with a value we know is nonsense.
This is not an uncommon problem if you're debugging a problem in early
boot, e.g. a panic that occurs prior to inittodr(9).
Currently we use the following logic in resettodr(9) to inhibit writes:
if (time_second == 1)
return;
... this is too magical.
A better way to accomplish the same thing is to introduce a dedicated
flag set from inittodr(9). Hence, "inittodr_done".
Suggested by visa@.
ok kettenis@
cheloha