Re: [PATCH 1/11] oprofile: add check_user_page_readable()

[Andrew Morton]

Greg Banks <gnb@xxxxxxxxxxxxxxxxx> wrote:
>
> Add check_user_page_readable() for kernel modules which need
>  to follow user space addresses but can't use get_user().

Strange.  What is the usage pattern for this?  And why is that usage
pattern not racy in the presence of paging activity?

Did you consider use_mm(), in conjunction with get_user()?
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