cpu_set_pte_ext is only guaranteed to be defined when CONFIG_MMU, so
don't export it to modules otherwise.

Signed-off-by: Will Deacon <redacted>
---
 arch/arm/mm/proc-syms.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mm/proc-syms.c b/arch/arm/mm/proc-syms.c
index 3e6210b..054b491 100644
--- a/arch/arm/mm/proc-syms.c
+++ b/arch/arm/mm/proc-syms.c

@@ -17,7 +17,9 @@
 
 #ifndef MULTI_CPU
 EXPORT_SYMBOL(cpu_dcache_clean_area);
+#ifdef CONFIG_MMU
 EXPORT_SYMBOL(cpu_set_pte_ext);
+#endif
 #else
 EXPORT_SYMBOL(processor);
 #endif

-- 
1.8.0