better SMP support for kprobes

[Frank Ch. Eigler]

Hi -


> [...]
> We can always just have it copy if possible, otherwise fail cleanly.

Indeed.

> [...]
> This is what my current runtime copy_from_user looks like:
> [...]
>   left = __copy_from_user_inatomic(dst, src, count);
> }

From looking at the 386 implementation, I don't get the impression that
__copy_from_user_inatomic is any safer to use than copy_from_user.
It might bypass the "might_sleep()" warning check, that's all.


- FChE
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