v4.19.13 snapshot.
diff --git a/arch/m68k/lib/memset.c b/arch/m68k/lib/memset.c
new file mode 100644
index 0000000..8a7639f
--- /dev/null
+++ b/arch/m68k/lib/memset.c
@@ -0,0 +1,74 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+
+void *memset(void *s, int c, size_t count)
+{
+ void *xs = s;
+ size_t temp;
+
+ if (!count)
+ return xs;
+ c &= 0xff;
+ c |= c << 8;
+ c |= c << 16;
+ if ((long)s & 1) {
+ char *cs = s;
+ *cs++ = c;
+ s = cs;
+ count--;
+ }
+ if (count > 2 && (long)s & 2) {
+ short *ss = s;
+ *ss++ = c;
+ s = ss;
+ count -= 2;
+ }
+ temp = count >> 2;
+ if (temp) {
+ long *ls = s;
+#if defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE)
+ for (; temp; temp--)
+ *ls++ = c;
+#else
+ size_t temp1;
+ asm volatile (
+ " movel %1,%2\n"
+ " andw #7,%2\n"
+ " lsrl #3,%1\n"
+ " negw %2\n"
+ " jmp %%pc@(2f,%2:w:2)\n"
+ "1: movel %3,%0@+\n"
+ " movel %3,%0@+\n"
+ " movel %3,%0@+\n"
+ " movel %3,%0@+\n"
+ " movel %3,%0@+\n"
+ " movel %3,%0@+\n"
+ " movel %3,%0@+\n"
+ " movel %3,%0@+\n"
+ "2: dbra %1,1b\n"
+ " clrw %1\n"
+ " subql #1,%1\n"
+ " jpl 1b"
+ : "=a" (ls), "=d" (temp), "=&d" (temp1)
+ : "d" (c), "0" (ls), "1" (temp));
+#endif
+ s = ls;
+ }
+ if (count & 2) {
+ short *ss = s;
+ *ss++ = c;
+ s = ss;
+ }
+ if (count & 1) {
+ char *cs = s;
+ *cs = c;
+ }
+ return xs;
+}
+EXPORT_SYMBOL(memset);