On 3/21/07, Rajat Jain <rajat.noida.india@xxxxxxxxx> wrote:
> > Open and close are called when a region is created and deleted respectively. > no_page is used during page faults for locating the pages and > allocating it if needed etc. > > > Does it means accessing a virtual address space for a process is not > > allowed if open fails or is not allowed?( suppose i do that > > delibarately in my module ). > > if open fails then it should mean that the region is not created how > would you access it then? > IMHO, the region is ALREAY CREATED when open is called, hence open() method cannot affect the creation / deletion of the region in any way. Also, there cannot be a "failed" open() call, since the return value is void. The open is merely called to give the driver a chance to initialize the region.
The open() and close() functions are called every time a region is created or deleted. Did i misinterpret this? I think I did....I think you are correct. Let me look up some code. -- Regards, Sandeep. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
