Christoph Rohland writes:
> Russell King <rmk@arm.linux.org.uk> writes:
> > Christoph Rohland writes:
> > > Or the ARM one? (The basic principle of shm was always the same
> > > and this could have been noticed when the ARM pte handling was
> > > designed.)
> >
> > ARM pte handling has not changed since 2.3.0. I think you
> > overlooked the way the ARM handles its ptes. ;(
>
> Yes, you are right. I did not carefully check your explanation of the
> ARM pte handling. The breakage was of course introduced with S/390
> requirement to use something else than memset.
I'm not sure if you saw the other bits of the discussion on l-k, but I
think we need a pte_init() construct which will initialise a pte in an
architecture specific way to be "empty".
This could be done with your page-based approach, but we should kill the
PTRS_PER_PTE since that is not required here. What we actually want is
a PTRS_PER_PAGE.
_____
|_____| ------------------------------------------------- ---+---+-
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