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If PAGE_SIZE is already defined in the system (e.g. in /usr/include/limits.h header) then gcc will trigger a redefinition error because of -Werror. This patch replaces usage of PAGE_* macros with KDD_PAGE_* macros in order to avoid confusion between control domain page granularity (PAGE_* definitions) and guest domain page granularity (which is what we are dealing with here). We chose to define the KDD_PAGE_* macros instead of using XC_PAGE_* macros because (1) the code in kdd.c should not include any Xen headers and (2) to add consistency for code in both kdd.c and kdd-xen.c. Signed-off-by: Costin Lupu <costin.lupu@cs.pub.ro> Reviewed-by: Tim Deegan <tim@xen.org> Acked-by: Ian Jackson <iwj@xenproject.org>