Re: Char Driver Munmap

[sudheer <urwithsudheer@xxxxxxxxx>]

Jan Hudec wrote:

On Thu, Dec 14, 2006 at 04:25:14PM -0800, Manisha Maheshwari wrote:
  

I am writing a Char device driver.

I need to implement the munmap  file operation for this driver.
Some how i couldn't find any infomation abt it in Linux device Driver book.
    

There is no such file_operation as munmap as of linux 2.6.18. Isn't that
the reason you can't find any info on it?

  

Can anybody provide the driver_munmap() code.

    

One way i know is -
In User space file   -  call munmap(mmaped_address, size);
Then switch to driver using   -  ioctl()  and
In driver code, the memory allocated can be freed.
I dont think  any specific driver_munmap() needed here as there is no file operation available.
If any other method , plz let us know.

Thanks in advance,
Manisha
    

--------------------------------------------------------------------------------
                  				- Jan Hudec `Bulb' <bulb@xxxxxx>

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