[parisc-linux] pgtable.h:acc_rights()

[Philipp Rumpf]

> the real problem is, that we don't have a working copy on write at the 
> moment. So whenever the first access to COW page is a read access, every
> write access afterwards will lead to an unhandled page fault (which causes
> a panic at the moment). 

Actually, there is some code there to explain this.  I never realized we did 
differentiate between read/write accesses and thought we were still hardcoding
a write access.  This shouldn't be too difficult to work around.

	Philipp Rumpf