On sparc64, we see: mm/hmm.c: In function 'hmm_vma_walk_pmd': mm/hmm.c:371:53: error: macro "pte_index" requires 2 arguments, but only 1 given mm/hmm.c:371:39: error: 'pte_index' undeclared (first use in this function)
...and on MIPS 64, we see: mm/hmm.c:57:22: error: field 'mmu_notifier' has incomplete type mm/hmm.c: In function 'hmm_register': mm/hmm.c:98:2: error: implicit declaration of function '__mmu_notifier_register' [-Werror=implicit-function-declaration] mm/hmm.c:111:3: error: implicit declaration of function 'mmu_notifier_unregister' [-Werror=implicit-function-declaration] ...and on Alpha, we see: mm/hmm.c: In function 'hmm_vma_walk_pmd': mm/hmm.c:371:4: error: implicit declaration of function 'pmd_pfn' mm/hmm.c:371:4: error: implicit declaration of function 'pte_index' ...and on PaRISC 64 we see: include/linux/hmm.h:405:7: warning: 'struct migrate_vma_ops' declared inside parameter list include/linux/hmm.h:405:7: warning: its scope is only this definition or declaration, which is probably not what you want mm/hmm.c: In function 'hmm_vma_walk_pmd': mm/hmm.c:371:4: error: implicit declaration of function 'pmd_pfn' [...] Set the dependency to the three arch that currently seem to build without issue -- ARM_64, X86_64 and S390. Since ia64 and ppc64 don't set CONFIG_64BIT, they were already excluded by the original dependency. The failing arch can be re-added as demand dictates, if/when they have been validated to build and function. Cc: Jérôme Glisse <jgli...@redhat.com> Cc: Evgeny Baskakov <ebaska...@nvidia.com> Cc: John Hubbard <jhubb...@nvidia.com> Cc: Mark Hairgrove <mhairgr...@nvidia.com> Cc: Sherry Cheung <sche...@nvidia.com> Cc: Subhash Gutti <sgu...@nvidia.com> Cc: Andrew Morton <a...@linux-foundation.org> Signed-off-by: Paul Gortmaker <paul.gortma...@windriver.com> --- mm/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/Kconfig b/mm/Kconfig index 3e9c31bf9aaa..6c27d2003a63 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -293,6 +293,7 @@ config ARCH_HAS_HMM bool default y depends on MMU && 64BIT + depends on ARM64 || X86_64 || S390 config HMM bool -- 2.11.0