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CONFIG_ARCH_HAS_HUGEPD is used to tell core mm when huge page directories are used. When they are not used, no need to provide hugepd_t or is_hugepd(), just rely on the core mm fallback definition. For that, change core mm behaviour so that CONFIG_ARCH_HAS_HUGEPD is used instead of indirect is_hugepd macro existence. powerpc being the only user of huge page directories, there is no impact on other architectures. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/da81462d93069bb90fe5e762dd3283a644318937.1662543243.git.christophe.leroy@csgroup.eu