Re: Why is the 'loff_t *offset' parameter in the file_operations'read function a pointer?

[Jiri Slaby]

On 04/26/2011 01:58 PM, Amit Ben Shahar wrote:
> (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?

Because you are responsible for changing it appropriately.

> is it in userspace?

Nope, in kernelspace.

I think this is described in LDD3, isn't it?

regards,
--
js
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