diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index 73348afa4b8014fc13d7cee0ba630e5a84e103cc..89a628455bc253b01c2cc7b9f3cc2a6d9a426493 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -1049,7 +1049,7 @@ int prom_putchar(char c)
 }
 EXPORT_SYMBOL(prom_putchar);
 
-void prom_free_prom_memory(void)
+void __init prom_free_prom_memory(void)
 {
 	if (CAVIUM_OCTEON_DCACHE_PREFETCH_WAR) {
 		/* Check for presence of Core-14449 fix.  */
diff --git a/arch/mips/lantiq/prom.c b/arch/mips/lantiq/prom.c
index 39ab3e786e59980df96adc3a1f25155c5bf24cb3..0db099ecc01648cca11a69cddcaab31c8c0a099e 100644
--- a/arch/mips/lantiq/prom.c
+++ b/arch/mips/lantiq/prom.c
@@ -41,7 +41,7 @@ int ltq_soc_type(void)
 	return soc_info.type;
 }
 
-void prom_free_prom_memory(void)
+void __init prom_free_prom_memory(void)
 {
 }
 
diff --git a/arch/mips/mti-sead3/sead3-init.c b/arch/mips/mti-sead3/sead3-init.c
index bfbd17b120a21d637888a65db614df206de41043..3572ea30173ef0e42932866effc0e1b720466b32 100644
--- a/arch/mips/mti-sead3/sead3-init.c
+++ b/arch/mips/mti-sead3/sead3-init.c
@@ -147,6 +147,6 @@ void __init prom_init(void)
 #endif
 }
 
-void prom_free_prom_memory(void)
+void __init prom_free_prom_memory(void)
 {
 }