Blackfin: implement ftrace mcount test (aebfef03) · Commits · e / devices / android_kernel_fairphone_FP4

arch/blackfin/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@ config BLACKFIN
		def_bool y
		select HAVE_FUNCTION_GRAPH_TRACER
		select HAVE_FUNCTION_TRACER
		select HAVE_FUNCTION_TRACE_MCOUNT_TEST
		select HAVE_IDE
		select HAVE_KERNEL_GZIP if RAMKERNEL
		select HAVE_KERNEL_BZIP2 if RAMKERNEL

+10 −1

Original line number	Diff line number	Diff line
		/*
		* mcount and friends -- ftrace stuff
		*
		* Copyright (C) 2009 Analog Devices Inc.
		* Copyright (C) 2009-2010 Analog Devices Inc.
		* Licensed under the GPL-2 or later.
		*/

		@@ -21,6 +21,15 @@
		* function will be waiting there. mmmm pie.
		*/
		ENTRY(__mcount)
		#ifdef CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST
		/* optional micro optimization: return if stopped */
		p1.l = _function_trace_stop;
		p1.h = _function_trace_stop;
		r3 = [p1];
		cc = r3 == 0;
		if ! cc jump _ftrace_stub (bp);
		#endif

		/* save third function arg early so we can do testing below */
		[--sp] = r2;