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SubjectRe: [PATCH 1/2] sysctl: add overflow detection to proc_get_long()
> > Yecchh...  First of all, the cast back to unsigned long long is completely
> > pointless. What's more,
> Sorry, seriously asking: why?

In C everything is casted to the same type before doing an operation,
in this case comparison

> This was meant to handle the case where
> sizeof(unsigned long long) != sizeof(unsigned long) and I just looked at
> _kstrtoul() which does the same:

Second cast is unnecessary. I don't remember why I did 2 casts.

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