Subject: [PATCH 7/7][RFC] powerpc32, ftrace: dynamic function graph tracer

From: Steven Rostedt <[email-masked]>
Date: Wed, 11 Feb 2009 20:10:58 -0500

From: Steven Rostedt <rostedt@gollum.(none)>

This patch gets function graph tracing working with dynamic function
tracer on PowerPC32.

Signed-off-by: Steven Rostedt <rostedt@gollum.(none)>
---
 arch/powerpc/Kconfig           |    2 +-
 arch/powerpc/kernel/entry_32.S |    8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 9e4bd20..40b7981 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -111,7 +111,7 @@ config PPC
 	select HAVE_FTRACE_MCOUNT_RECORD
 	select HAVE_DYNAMIC_FTRACE
 	select HAVE_FUNCTION_TRACER
-	select HAVE_FUNCTION_GRAPH_TRACER if PPC64 || !DYNAMIC_FTRACE
+	select HAVE_FUNCTION_GRAPH_TRACER
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select HAVE_IDE
 	select HAVE_IOREMAP_PROT
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 9cf7083..529bfbb 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -1183,7 +1183,12 @@ _GLOBAL(ftrace_caller)
 ftrace_call:
 	bl	ftrace_stub
 	nop
-
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+.globl ftrace_graph_call
+ftrace_graph_call:
+	b	ftrace_graph_stub
+_GLOBAL(ftrace_graph_stub)
+#endif
 	MCOUNT_RESTORE_FRAME
 	/* old link register ends up in ctr reg */
 	bctr
@@ -1205,7 +1210,6 @@ _GLOBAL(_mcount)
 	b	ftrace_graph_caller
 #endif
 	MCOUNT_RESTORE_FRAME
-	
 	bctr
 #endif
 
-- 
1.5.6.5

--