If sparsemem is activated all sections with present pages must
be accordingly marked after memblock is fully initialized.

Signed-off-by: Serge Semin <redacted>
---
  arch/mips/kernel/setup.c | 5 +++++
  1 file changed, 5 insertions(+)

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index b2a5b89ae6b2..54302319ce1c 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c

@@ -837,6 +837,11 @@ static void __init arch_mem_init(char **cmdline_p)
  				 crashk_res.end - crashk_res.start + 1);
  #endif
  	device_tree_init();
+#ifdef CONFIG_SPARSEMEM
+	for_each_memblock(memory, reg)
+		memory_present(0, memblock_region_memory_base_pfn(reg),
+				memblock_region_memory_end_pfn(reg));
+#endif /* CONFIG_SPARSEMEM */