Use of copy_to_user() and copy_from_user() functions

[anish singh]

On Mon, Feb 11, 2013 at 4:51 PM, पारस <beparas at gmail.com> wrote:
> Hi All,
>
> To read/write data to user-space from kernel-space we use copy_from_user()
> and copy_to_user() functions.
>
> What is the use of these function?
> Why kernel can't directly access user address and read/write on to it?
what will happen if the user space process gets scheduled out while
you were using it?
> Can any one explain why kernel can't directly access the user-space
address.
>
> Thanks
>
>
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