Blackfin: add support for irqflags tracing

Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/include/asm/context.S

@@ -72,6 +72,11 @@
 	sti r0;
 #else
 	cli r0;
+#endif
+#ifdef CONFIG_TRACE_IRQFLAGS
+	sp += -12;
+	call _trace_hardirqs_off;
+	sp += 12;
 #endif
 	[--sp] = RETI;  /*orig_pc*/
 	/* Clear all L registers.  */
@@ -279,6 +284,13 @@
 	RETN = [sp++];
 	RETX = [sp++];
 	RETI = [sp++];
+
+#ifdef CONFIG_TRACE_IRQFLAGS
+	sp += -12;
+	call _trace_hardirqs_on;
+	sp += 12;
+#endif
+
 	RETS = [sp++];
 
 #ifdef CONFIG_SMP