copy_to_user() and copy_from_user(): confusing code

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Subject: copy_to_user() and copy_from_user(): confusing code
From: mohit verma <mohit89mlnc@xxxxxxxxx>
Date: Thu, 23 Sep 2010 23:56:20 +0530

hi all,
i many times tried to understand the coding of copy_to_user() and copy_from_user() functions (frequently used in kernel ). but each time at get stuck at the assembly coding.
can someone elaborate on this section ,please?

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