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The ppc_radix64_walk_tree() routine walks through the nested radix tables to look for a PTE. Split it in two and introduce a new routine ppc_radix64_next_level() which we will use for partition-scoped Radix translation when translating the process tree addresses. The prototypes are slightly change to use a 'AddressSpace *' parameter, instead of a 'PowerPCCPU *' which is not required, and to return an error code instead of a PTE value. It clarifies error handling in the callers. Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Signed-off-by: Greg Kurz <groug@kaod.org> Signed-off-by: Cédric Le Goater <clg@kaod.org> Message-Id: <20200403140056.59465-4-clg@kaod.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>