diff --git a/arch/arm64/lib/memcmp.S b/arch/arm64/lib/memcmp.S
index 86c54017b700..490ceb7e8d66 100644
--- a/arch/arm64/lib/memcmp.S
+++ b/arch/arm64/lib/memcmp.S
@@ -1,8 +1,8 @@
 /*
- * Copyright (c) 2013-2020, Arm Limited.
+ * Copyright (c) 2013-2021, Arm Limited.
  *
  * Adapted from the original at:
- * https://github.com/ARM-software/optimized-routines/blob/master/string/aarch64/memcmp.S
+ * https://github.com/ARM-software/optimized-routines/blob/e823e3abf5f89ecb/string/aarch64/memcmp.S
  */
 
 #include <linux/linkage.h>
diff --git a/arch/arm64/lib/memcpy.S b/arch/arm64/lib/memcpy.S
index 460810b65fcb..e7050b43e923 100644
--- a/arch/arm64/lib/memcpy.S
+++ b/arch/arm64/lib/memcpy.S
@@ -1,8 +1,8 @@
 /*
- * Copyright (c) 2012-2020, Arm Limited.
+ * Copyright (c) 2012-2021, Arm Limited.
  *
  * Adapted from the original at:
- * https://github.com/ARM-software/optimized-routines/blob/master/string/aarch64/memcpy.S
+ * https://github.com/ARM-software/optimized-routines/blob/afd6244a1f8d9229/string/aarch64/memcpy.S
  */
 
 #include <linux/linkage.h>
diff --git a/arch/arm64/lib/strcmp.S b/arch/arm64/lib/strcmp.S
index faa3a1b42d1b..25408a748dce 100644
--- a/arch/arm64/lib/strcmp.S
+++ b/arch/arm64/lib/strcmp.S
@@ -1,8 +1,8 @@
 /*
- * Copyright (c) 2012-2020, Arm Limited.
+ * Copyright (c) 2012-2021, Arm Limited.
  *
  * Adapted from the original at:
- * https://github.com/ARM-software/optimized-routines/blob/master/string/aarch64/strcmp.S
+ * https://github.com/ARM-software/optimized-routines/blob/afd6244a1f8d9229/string/aarch64/strcmp.S
  */
 
 #include <linux/linkage.h>
diff --git a/arch/arm64/lib/strlen.S b/arch/arm64/lib/strlen.S
index 2e92f19d7b33..8f46c3858217 100644
--- a/arch/arm64/lib/strlen.S
+++ b/arch/arm64/lib/strlen.S
@@ -1,8 +1,8 @@
 /*
- * Copyright (c) 2013, Arm Limited.
+ * Copyright (c) 2013-2021, Arm Limited.
  *
  * Adapted from the original at:
- * https://github.com/ARM-software/optimized-routines/blob/master/string/aarch64/strlen.S
+ * https://github.com/ARM-software/optimized-routines/blob/98e4d6a5c13c8e54/string/aarch64/strlen.S
  */
 
 #include <linux/linkage.h>
diff --git a/arch/arm64/lib/strncmp.S b/arch/arm64/lib/strncmp.S
index 498b037de612..47cd6625d61c 100644
--- a/arch/arm64/lib/strncmp.S
+++ b/arch/arm64/lib/strncmp.S
@@ -1,8 +1,8 @@
 /*
- * Copyright (c) 2013, Arm Limited.
+ * Copyright (c) 2013-2021, Arm Limited.
  *
  * Adapted from the original at:
- * https://github.com/ARM-software/optimized-routines/blob/master/string/aarch64/strncmp.S
+ * https://github.com/ARM-software/optimized-routines/blob/e823e3abf5f89ecb/string/aarch64/strncmp.S
  */
 
 #include <linux/linkage.h>