diff --git a/arch/sw_64/lib/csum_partial_copy.c b/arch/sw_64/lib/csum_partial_copy.c
index 5e5274e82b2b8dc4ffc0a46a0bb38f43825350ce..742dd63cdb702c5980adc5aa9cec898948105303 100644
--- a/arch/sw_64/lib/csum_partial_copy.c
+++ b/arch/sw_64/lib/csum_partial_copy.c
@@ -61,7 +61,11 @@ csum_partial_cfu_dest_aligned(const unsigned long __user *src,
 	unsigned long checksum = ~0U;
 	int err = 0;
 
-	err = __copy_from_user(dst, src, len+8);
+	if (likely(!uaccess_kernel()))
+		err = __copy_from_user(dst, src, len + 8);
+	else
+		memcpy(dst, src, len + 8);
+
 	while (len > 0) {
 		word = *dst;
 		checksum += word;
@@ -89,7 +93,10 @@ csum_partial_cfu_dest_unaligned(const unsigned long __user *src,
 	unsigned long checksum = ~0U;
 	int err = 0;
 
-	err = __copy_from_user(dst, src, len+8);
+	if (likely(!uaccess_kernel()))
+		err = __copy_from_user(dst, src, len + 8);
+	else
+		memcpy(dst, src, len + 8);
 
 	dst = (unsigned long *)((unsigned long)dst & (~7UL));
 	word = *dst;