[SPARC64]: Fix sparse warnings wrt. machine_alt_power_off().
arch/sparc64/kernel/process.c:123:6: warning: symbol 'machine_alt_power_off' was not declared. Should it be static?
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/asm-sparc64/reboot.h b/include/asm-sparc64/reboot.h
new file mode 100644
index 0000000..3f3f43f
--- /dev/null
+++ b/include/asm-sparc64/reboot.h
@@ -0,0 +1,6 @@
+#ifndef _SPARC64_REBOOT_H
+#define _SPARC64_REBOOT_H
+
+extern void machine_alt_power_off(void);
+
+#endif /* _SPARC64_REBOOT_H */