The recently merged HPT (Hash Page Table) resize support broke the build
when BOOK3S_64=n (ie. 32-bit or 64-bit Book3E) and MEMORY_HOTPLUG=y:
arch/powerpc/mm/mem.o: In function `.arch_add_memory':
(.text+0x4e4): undefined reference to `.resize_hpt_for_hotplug'
Fix it by adding a dummy version.
Fixes: 438cc81a41e8 ("powerpc/pseries: Automatically resize HPT for memory hot
add/remove")
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
---
arch/powerpc/include/asm/sparsemem.h | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/sparsemem.h
b/arch/powerpc/include/asm/sparsemem.h
index 737335c891e4..c88930c9db7f 100644
--- a/arch/powerpc/include/asm/sparsemem.h
+++ b/arch/powerpc/include/asm/sparsemem.h
@@ -16,9 +16,15 @@
#endif /* CONFIG_SPARSEMEM */
#ifdef CONFIG_MEMORY_HOTPLUG
-extern void resize_hpt_for_hotplug(unsigned long new_mem_size);
extern int create_section_mapping(unsigned long start, unsigned long end);
extern int remove_section_mapping(unsigned long start, unsigned long end);
+
+#ifdef CONFIG_PPC_BOOK3S_64
+extern void resize_hpt_for_hotplug(unsigned long new_mem_size);
+#else
+static inline void resize_hpt_for_hotplug(unsigned long new_mem_size) { }
+#endif
+
#ifdef CONFIG_NUMA
extern int hot_add_scn_to_nid(unsigned long scn_addr);
#else
--
2.7.4
