linux-kernel - Why is the 'loff_t *offset' parameter in the file

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Date:	Tue, 26 Apr 2011 14:58:00 +0300
From:	Amit Ben Shahar <amit.bens@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Why is the 'loff_t *offset' parameter in the file_operations' read
 function a pointer?

(if i'm off topic or should look elsewhere i apologize - couldn't find
information anywhere)
I am coding a kernel module and implementing a file's operations, the
read operation received an loff_t *offset parameter, why is this a
pointer? is it in userspace?
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