diff --git a/arch/x86/include/asm/e820/api.h b/arch/x86/include/asm/e820/api.h
index 2410d4cdbafc..8e0f8b85b209 100644
--- a/arch/x86/include/asm/e820/api.h
+++ b/arch/x86/include/asm/e820/api.h
@@ -19,8 +19,8 @@ extern void e820__print_table(char *who);
 extern int  e820__update_table(struct e820_table *table);
 extern void e820__update_table_print(void);
 
-extern unsigned long e820_end_of_ram_pfn(void);
-extern unsigned long e820_end_of_low_ram_pfn(void);
+extern unsigned long e820__end_of_ram_pfn(void);
+extern unsigned long e820__end_of_low_ram_pfn(void);
 
 extern u64  e820__memblock_alloc_reserved(u64 size, u64 align);
 extern void e820__memblock_setup(void);
@@ -35,7 +35,7 @@ extern void e820__memory_setup_extended(u64 phys_addr, u32 data_len);
 extern char *e820__memory_setup_default(void);
 extern void e820__setup_pci_gap(void);
 
-extern void e820_reallocate_tables(void);
+extern void e820__reallocate_tables(void);
 extern void e820__register_nosave_regions(unsigned long limit_pfn);
 
 /*
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 9d179676a89e..d2c6468a8d38 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -641,7 +641,7 @@ __init void e820__setup_pci_gap(void)
  * All functions which modify them are __init functions, which won't exist
  * after free_initmem().
  */
-__init void e820_reallocate_tables(void)
+__init void e820__reallocate_tables(void)
 {
 	struct e820_table *n;
 	int size;
@@ -803,12 +803,12 @@ static unsigned long __init e820_end_pfn(unsigned long limit_pfn, enum e820_type
 	return last_pfn;
 }
 
-unsigned long __init e820_end_of_ram_pfn(void)
+unsigned long __init e820__end_of_ram_pfn(void)
 {
 	return e820_end_pfn(MAX_ARCH_PFN, E820_TYPE_RAM);
 }
 
-unsigned long __init e820_end_of_low_ram_pfn(void)
+unsigned long __init e820__end_of_low_ram_pfn(void)
 {
 	return e820_end_pfn(1UL << (32 - PAGE_SHIFT), E820_TYPE_RAM);
 }
@@ -867,7 +867,7 @@ static int __init parse_memmap_one(char *p)
 		 * the real memory size before the original memory map is
 		 * reset.
 		 */
-		saved_max_pfn = e820_end_of_ram_pfn();
+		saved_max_pfn = e820__end_of_ram_pfn();
 #endif
 		e820_table->nr_entries = 0;
 		userdef = 1;
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 0e0b15b53c69..a1114ffff0f5 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1044,12 +1044,12 @@ void __init setup_arch(char **cmdline_p)
 	 * partially used pages are not usable - thus
 	 * we are rounding upwards:
 	 */
-	max_pfn = e820_end_of_ram_pfn();
+	max_pfn = e820__end_of_ram_pfn();
 
 	/* update e820 for memory not covered by WB MTRRs */
 	mtrr_bp_init();
 	if (mtrr_trim_uncached_memory(max_pfn))
-		max_pfn = e820_end_of_ram_pfn();
+		max_pfn = e820__end_of_ram_pfn();
 
 	max_possible_pfn = max_pfn;
 
@@ -1068,7 +1068,7 @@ void __init setup_arch(char **cmdline_p)
 	/* How many end-of-memory variables you have, grandma! */
 	/* need this before calling reserve_initrd */
 	if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
-		max_low_pfn = e820_end_of_low_ram_pfn();
+		max_low_pfn = e820__end_of_low_ram_pfn();
 	else
 		max_low_pfn = max_pfn;
 
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 6b6b4c59cfc1..2193799ca800 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -701,7 +701,7 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
 
 void __ref free_initmem(void)
 {
-	e820_reallocate_tables();
+	e820__reallocate_tables();
 
 	free_init_pages("unused kernel",
 			(unsigned long)(&__init_begin),