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diff --git a/kernel/arch/arm64/lib/strrchr.S b/kernel/arch/arm64/lib/strrchr.S
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+/*
+ * Based on arch/arm/lib/strrchr.S
+ *
+ * Copyright (C) 1995-2000 Russell King
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+
+/*
+ * Find the last occurrence of a character in a string.
+ *
+ * Parameters:
+ * x0 - str
+ * x1 - c
+ * Returns:
+ * x0 - address of last occurrence of 'c' or 0
+ */
+ENTRY(strrchr)
+ mov x3, #0
+ and w1, w1, #0xff
+1: ldrb w2, [x0], #1
+ cbz w2, 2f
+ cmp w2, w1
+ b.ne 1b
+ sub x3, x0, #1
+ b 1b
+2: mov x0, x3
+ ret
+ENDPROC(strrchr)