v4.19.13 snapshot.
diff --git a/arch/m68k/include/asm/segment.h b/arch/m68k/include/asm/segment.h
new file mode 100644
index 0000000..0b4cc1e
--- /dev/null
+++ b/arch/m68k/include/asm/segment.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _M68K_SEGMENT_H
+#define _M68K_SEGMENT_H
+
+/* define constants */
+/* Address spaces (FC0-FC2) */
+#define USER_DATA (1)
+#ifndef __USER_DS
+#define __USER_DS (USER_DATA)
+#endif
+#define USER_PROGRAM (2)
+#define SUPER_DATA (5)
+#ifndef __KERNEL_DS
+#define __KERNEL_DS (SUPER_DATA)
+#endif
+#define SUPER_PROGRAM (6)
+#define CPU_SPACE (7)
+
+#ifndef __ASSEMBLY__
+
+typedef struct {
+ unsigned long seg;
+} mm_segment_t;
+
+#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
+
+#ifdef CONFIG_CPU_HAS_ADDRESS_SPACES
+/*
+ * Get/set the SFC/DFC registers for MOVES instructions
+ */
+#define USER_DS MAKE_MM_SEG(__USER_DS)
+#define KERNEL_DS MAKE_MM_SEG(__KERNEL_DS)
+
+static inline mm_segment_t get_fs(void)
+{
+ mm_segment_t _v;
+ __asm__ ("movec %/dfc,%0":"=r" (_v.seg):);
+ return _v;
+}
+
+static inline void set_fs(mm_segment_t val)
+{
+ __asm__ __volatile__ ("movec %0,%/sfc\n\t"
+ "movec %0,%/dfc\n\t"
+ : /* no outputs */ : "r" (val.seg) : "memory");
+}
+
+static inline mm_segment_t get_ds(void)
+{
+ /* return the supervisor data space code */
+ return KERNEL_DS;
+}
+
+#else
+#define USER_DS MAKE_MM_SEG(TASK_SIZE)
+#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
+#define get_ds() (KERNEL_DS)
+#define get_fs() (current_thread_info()->addr_limit)
+#define set_fs(x) (current_thread_info()->addr_limit = (x))
+#endif
+
+#define segment_eq(a, b) ((a).seg == (b).seg)
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _M68K_SEGMENT_H */