From c79a61f55773d2519fd0525bf58385f7d20752d3 Mon Sep 17 00:00:00 2001
From: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
Date: Fri, 27 Feb 2009 21:30:03 +0100
Subject: tracing: make CALLER_ADDRx overwriteable

The current definition of CALLER_ADDRx isn't suitable for all platforms.
E.g. for ARM __builtin_return_address(N) doesn't work for N > 0 and
AFAIK for powerpc there are no frame pointers needed to have a working
__builtin_return_address.  This patch allows defining the CALLER_ADDRx
macros in <asm/ftrace.h> and let these take precedence.

Because now <asm/ftrace.h> is included unconditionally in
<linux/ftrace.h> all archs that don't already had this include get an
empty one for free.

Signed-off-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
 arch/xtensa/include/asm/ftrace.h | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 arch/xtensa/include/asm/ftrace.h

(limited to 'arch/xtensa')

diff --git a/arch/xtensa/include/asm/ftrace.h b/arch/xtensa/include/asm/ftrace.h
new file mode 100644
index 00000000000..40a8c178f10
--- /dev/null
+++ b/arch/xtensa/include/asm/ftrace.h
@@ -0,0 +1 @@
+/* empty */
-- 
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