From: "Mike Rapoport (Microsoft)" <rppt@kernel.org>

This is required to make numa emulation code architecture independent so
that it can be moved to generic code in following commits.

Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Tested-by: Zi Yan <ziy@nvidia.com> # for x86_64 and arm64
---
  arch/x86/include/asm/numa.h  | 1 +
  arch/x86/mm/numa.c           | 5 +++++
  arch/x86/mm/numa_emulation.c | 4 ++--
  3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/numa.h b/arch/x86/include/asm/numa.h
index 7017d540894a..b22c85c1ef18 100644
--- a/arch/x86/include/asm/numa.h
+++ b/arch/x86/include/asm/numa.h

@@ -74,6 +74,7 @@ void debug_cpumask_set_cpu(int cpu, int node, bool enable);
  int numa_emu_cmdline(char *str);
  void __init numa_emu_update_cpu_to_node(int *emu_nid_to_phys,
  					unsigned int nr_emu_nids);
+u64 __init numa_emu_dma_end(void);
  #else /* CONFIG_NUMA_EMU */
  static inline int numa_emu_cmdline(char *str)
  {

diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 9180d524cfe4..8b7c6580d268 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c

@@ -868,6 +868,11 @@ void __init numa_emu_update_cpu_to_node(int *emu_nid_to_phys,
  		__apicid_to_node[i] = j < nr_emu_nids ? j : 0;
  	}
  }
+
+u64 __init numa_emu_dma_end(void)
+{
+	return PFN_PHYS(MAX_DMA32_PFN);
+}