On Tue, Nov 01, 2016 at 11:36:08PM +0100, Jan Kara wrote:

Currently we have two different structures for passing fault information
around - struct vm_fault and struct fault_env. DAX will need more
information in struct vm_fault to handle its faults so the content of
that structure would become event closer to fault_env. Furthermore it
would need to generate struct fault_env to be able to call some of the
generic functions. So at this point I don't think there's much use in
keeping these two structures separate. Just embed into struct vm_fault
all that is needed to use it for both purposes.

What about just reference fault_env from vm_fault? We don't always need
vm_fault where we nee fault_env. It may save space on stack for some
codepaths.

-- 
 Kirill A. Shutemov

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