diff --git a/include/arch/arc/arcprc.h b/include/arch/arc/arcprc.h
index 84ab102ed88..3d5c2939c7c 100644
--- a/include/arch/arc/arcprc.h
+++ b/include/arch/arc/arcprc.h
@@ -59,9 +59,6 @@ extern "C" {
 
 #define TICK_EVENT 0
 
-#define k_memcpy memcpy
-#define k_memset memset
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/arch/arm/ARMprc.h b/include/arch/arm/ARMprc.h
index 50c75d8eb22..fa8d2446562 100644
--- a/include/arch/arm/ARMprc.h
+++ b/include/arch/arm/ARMprc.h
@@ -55,9 +55,6 @@ extern "C" {
 #define OCTET_TO_SIZEOFUNIT(X) (X)
 #define SIZEOFUNIT_TO_OCTET(X) (X)
 
-#define k_memcpy memcpy
-#define k_memset memset
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/arch/x86/asm_inline_gcc.h b/include/arch/x86/asm_inline_gcc.h
index 943a1ff9652..2df97715383 100644
--- a/include/arch/x86/asm_inline_gcc.h
+++ b/include/arch/x86/asm_inline_gcc.h
@@ -390,73 +390,5 @@ static inline inline __attribute__((always_inline))
 	return retLong;
 }
 
-
-/********************************************************
- *
- * k_memcpy - copy memory area
- *
- * Copy _n bytes from source _s to destination _d
- *
- * RETURNS: N/A
- *
- * \NOMANUAL
- */
-
-static inline void k_memcpy(void *_d, const void *_s, size_t _n)
-{
-	/* _d & _s must be aligned to use movsl. */
-#ifndef CONFIG_UNALIGNED_WRITE_UNSUPPORTED
-	if ((_n&3) == 0) {
-		/* _n is multiple of words, much more efficient to do word moves */
-		_n >>= 2;
-		__asm__ volatile ("rep movsl" :
-			  "+D" (_d), "+S" (_s), "+c" (_n) :
-			  :
-			  "cc", "memory");
-	} else
-#endif /* CONFIG_UNALIGNED_WRITE_UNSUPPORTED */
-	{
-		__asm__ volatile ("rep movsb" :
-			  "+D" (_d), "+S" (_s), "+c" (_n) :
-			  :
-			  "cc", "memory");
-	}
-}
-
-
-/********************************************************
- *
- * k_memset - set memory area
- *
- * Set _n bytes in the area _d to value _v
- *
- * RETURNS: N/A
- *
- * \NOMANUAL
- */
-
-static inline void k_memset(void *_d, int _v, size_t _n)
-{
-	/* _d must be aligned to use stosl. */
-#ifndef CONFIG_UNALIGNED_WRITE_UNSUPPORTED
-	if ((_n&3) == 0) {
-		/* _n is multiple of words, much more efficient to do word stores */
-		_n >>= 2;
-		_v |= _v<<8;
-		_v |= _v<<16;
-		__asm__ volatile ("rep stosl" :
-			  "+D" (_d), "+c" (_n) :
-			  "a" (_v) :
-			  "cc", "memory");
-	} else
-#endif /* CONFIG_UNALIGNED_WRITE_UNSUPPORTED */
-	{
-		__asm__ volatile ("rep stosb" :
-			  "+D" (_d), "+c" (_n) :
-			  "a" (_v) :
-			  "cc", "memory");
-	}
-}
-
 #endif /* _ASMLANGUAGE */
 #endif /* _ASM_INLINE_GCC_PUBLIC_GCC_H */