From c1340c053be7a43d837a3acb352d5008be865a55 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Sun, 28 Jun 2009 14:05:44 +0100 Subject: sh: Define HAVE_FUNCTION_TRACE_MCOUNT_TEST Enable HAVE_FUNCTION_TRACE_MCOUNT_TEST and test the value of function_trace_stop from our assembly code as opposed to using the generic C function. This should optimise our mcount/ftrace code path. Signed-off-by: Matt Fleming Signed-off-by: Paul Mundt --- arch/sh/lib/mcount.S | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'arch/sh/lib') diff --git a/arch/sh/lib/mcount.S b/arch/sh/lib/mcount.S index 110fbfe1831..cb87ef580b3 100644 --- a/arch/sh/lib/mcount.S +++ b/arch/sh/lib/mcount.S @@ -2,7 +2,7 @@ * arch/sh/lib/mcount.S * * Copyright (C) 2008 Paul Mundt - * Copyright (C) 2008 Matt Fleming + * Copyright (C) 2008, 2009 Matt Fleming * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive @@ -35,6 +35,12 @@ .type mcount,@function _mcount: mcount: +#ifndef CONFIG_DYNAMIC_FTRACE + mov.l .Lfunction_trace_stop, r0 + mov.l @r0, r0 + tst r0, r0 + bf ftrace_stub +#endif MCOUNT_ENTER() #ifdef CONFIG_DYNAMIC_FTRACE @@ -62,6 +68,11 @@ skip_trace: #ifdef CONFIG_DYNAMIC_FTRACE .globl ftrace_caller ftrace_caller: + mov.l .Lfunction_trace_stop, r0 + mov.l @r0, r0 + tst r0, r0 + bf ftrace_stub + MCOUNT_ENTER() .globl ftrace_call @@ -88,3 +99,7 @@ ftrace_call: ftrace_stub: rts nop + + .align 2 +.Lfunction_trace_stop: + .long function_trace_stop -- cgit v1.2.3