Re: [uClinux-dev] bug in order>0 page allocations with !CONFIG_MMU

[David Howells]

> > Why is doing this necessary at all? No one should be touching the
> > individual pages of a block allocation. The kernel should defend itself
> > against userspace trying to munmap part of a multipage mmap.
> 
> I don't recall right now why we had to do this originally.
> It was absolutely neccessary once, but I don't think we need
> this anymore. At least it runs fine on m68knommu targets now
> without this.

I've just found out what it's necessary for. access_process_vm() as called
from, say, /proc/cmdline.

David
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