Linux Virtualization - Apr 2007 - [PATCH 6/6] i386 virtualization - Attempt to clean up pgtable code motion

* zach@vmware.com (zach@vmware.com) wrote:
> Virtualization aware Linux kernels may need to redefine functions which
write
> to hardware page tables at the sub-architecture layer.  Previously, this
was
> done by encapsulation in a split mach-xxx/pgtable-{2|3}level-ops.h file,
but
> having 8 pgtable header files is simply unacceptable.  This goes some ways
> towards cleaning that up by deprecating the 2/3 level subarch functions.
> This is accomplished by using __HAVE_ARCH_FUNC macros, and allowing
> one sub-arch file, pgtable-ops.h, which gets included before any functions
> which write to hardware page tables, allowing the sub-architecture to
override
> any or all definitions it needs.
This looks like a better tradeoff.