--- a/arch/arm/include/asm/io.h	2014-08-19 08:42:46.000000000 +0200
+++ b/arch/arm/include/asm/io.h	2020-09-15 09:36:28.791308985 +0200
@@ -75,7 +75,7 @@
 #define __arch_putw(v,a)		(*(volatile unsigned short *)(a) = (v))
 #define __arch_putl(v,a)		(*(volatile unsigned int *)(a) = (v))
 
-extern inline void __raw_writesb(unsigned long addr, const void *data,
+static inline void __raw_writesb(unsigned long addr, const void *data,
 				 int bytelen)
 {
 	uint8_t *buf = (uint8_t *)data;
@@ -83,7 +83,7 @@
 		__arch_putb(*buf++, addr);
 }
 
-extern inline void __raw_writesw(unsigned long addr, const void *data,
+static inline void __raw_writesw(unsigned long addr, const void *data,
 				 int wordlen)
 {
 	uint16_t *buf = (uint16_t *)data;
@@ -91,7 +91,7 @@
 		__arch_putw(*buf++, addr);
 }
 
-extern inline void __raw_writesl(unsigned long addr, const void *data,
+static inline void __raw_writesl(unsigned long addr, const void *data,
 				 int longlen)
 {
 	uint32_t *buf = (uint32_t *)data;
@@ -99,21 +99,21 @@
 		__arch_putl(*buf++, addr);
 }
 
-extern inline void __raw_readsb(unsigned long addr, void *data, int bytelen)
+static inline void __raw_readsb(unsigned long addr, void *data, int bytelen)
 {
 	uint8_t *buf = (uint8_t *)data;
 	while(bytelen--)
 		*buf++ = __arch_getb(addr);
 }
 
-extern inline void __raw_readsw(unsigned long addr, void *data, int wordlen)
+static inline void __raw_readsw(unsigned long addr, void *data, int wordlen)
 {
 	uint16_t *buf = (uint16_t *)data;
 	while(wordlen--)
 		*buf++ = __arch_getw(addr);
 }
 
-extern inline void __raw_readsl(unsigned long addr, void *data, int longlen)
+static inline void __raw_readsl(unsigned long addr, void *data, int longlen)
 {
 	uint32_t *buf = (uint32_t *)data;
 	while(longlen--)