SPARC: Move sun_do_break from serial layer into arch code.

arch/sparc64/kernel/setup.c

@@ -690,3 +690,14 @@ struct seq_operations cpuinfo_op = {
 	.stop =	c_stop,
 	.show =	show_cpuinfo,
 };
+
+void sun_do_break(void)
+{
+	if (!stop_a_enabled)
+		return;
+
+	printk("\n");
+	flush_user_windows();
+
+	prom_cmdline();
+}

arch/sparc64/kernel/sparc64_ksyms.c

@@ -362,9 +362,8 @@ void VISenter(void);
 /* RAID code needs this */
 EXPORT_SYMBOL_NOVERS(VISenter);
 
-extern void batten_down_hatches(void);
 /* for input/keybdev */
-EXPORT_SYMBOL(batten_down_hatches);
+EXPORT_SYMBOL(sun_do_break);
 
 #ifdef CONFIG_DEBUG_BUGVERBOSE
 EXPORT_SYMBOL(do_BUG);

drivers/serial/suncore.c

@@ -141,26 +141,6 @@ sunserial_console_termios(struct console *con)
 
 EXPORT_SYMBOL(sunserial_console_termios);
 
-void
-sun_do_break(void)
-{
-	if (!stop_a_enabled)
-		return;
-
-	printk("\n");
-	flush_user_windows();
-
-#ifndef CONFIG_SPARC64
-	if ((unsigned long)linux_dbvec >= DEBUG_FIRSTVADDR &&
-	    (unsigned long)linux_dbvec <= DEBUG_LASTVADDR)
-		sp_enter_debugger();
-	else
-#endif
-		prom_cmdline();
-}
-
-EXPORT_SYMBOL(sun_do_break);
-
 /* Sun serial MOUSE auto baud rate detection.  */
 static struct mouse_baud_cflag {
 	int baud;

drivers/serial/suncore.h

@@ -19,8 +19,6 @@
 #define SUNKBD_UP		0x80
 #define SUNKBD_A		0x4d
 
-extern void sun_do_break(void);
-
 extern unsigned int suncore_mouse_baud_cflag_next(unsigned int, int *);
 extern int suncore_mouse_baud_detection(unsigned char, int);
 

include/asm-sparc64/system.h

@@ -120,6 +120,8 @@ enum sparc_cpu {
 
 #ifndef __ASSEMBLY__
 
+extern void sun_do_break(void);
+
 extern void synchronize_user_stack(void);
 
 extern void __flushw_user(void);