Re: [PATCH] fat: Allow time_offset to be upto 13 hours

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Volker Kuhlmann <list0570@xxxxxxxxxxxxxxx> writes:

>> But I'm not sure why 13?
>
> It's the minimum that is absolutely required to cover the DST offset in 
> New Zealand. At the moment. There may be other places around the date 
> line for which even that is not sufficient. Someone's been thoughtless 
> already (has happened regularly for decades, probably won't be the last 
> time either). Fix it properly.
>
> If the kernel uses +-24 in places then please stick to +-24. There may 
> be a reason for that not everyone knows about. The purpose of the range 
> check is to be a SANITY check, not to tell me, the user, how I have to 
> operate my system. If I want 3 minutes, I want 3 minutes, and it's not 
> the kernel programmer's job to enforce.
>
> Or do you wish to track the legal time zone AND DST offsets in every 
> place in the world, make a list, stick that into the kernel, and 
> maintain it? I hope not.

Actually, it is correct timezone support (for example, daylight).

> A good limit would be 2 less of whatever fits into 8 bit. Or something 
> like that. Like +-120.

I'm not against to change.  But don't want to change this multiple
times, and step by step. It is why I'm asking.

Well so, how does it overs 24 hours (i.e. a day) for sane tz offset
(implementation is just a dumb adjustment of timestamp, but this option
should means tz offset)? (And +-24 hours is used for TZ spec too.)

Thanks.
-- 
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
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