diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index 8f5afad1b6aff..6dd4744cc56ab 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -122,8 +122,6 @@ unsigned long mmu_mapin_ram(unsigned long base, unsigned long top);
 #ifdef CONFIG_PPC_FSL_BOOK3E
 extern unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx,
 				     bool dryrun, bool init);
-extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
-				 phys_addr_t phys);
 #ifdef CONFIG_PPC32
 extern void adjust_total_lowmem(void);
 extern int switch_to_as1(void);
diff --git a/arch/powerpc/mm/nohash/fsl_book3e.c b/arch/powerpc/mm/nohash/fsl_book3e.c
index b8ae6c08c06fd..c1ad173de318d 100644
--- a/arch/powerpc/mm/nohash/fsl_book3e.c
+++ b/arch/powerpc/mm/nohash/fsl_book3e.c
@@ -135,8 +135,8 @@ static void settlbcam(int index, unsigned long virt, phys_addr_t phys,
 	tlbcam_addrs[index].phys = phys;
 }
 
-unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
-			  phys_addr_t phys)
+static unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
+				 phys_addr_t phys)
 {
 	unsigned int camsize = __ilog2(ram);
 	unsigned int align = __ffs(virt | phys);