powerpc32, ftrace: dynamic function graph tracer

This patch gets function graph tracing working with dynamic function tracer on PowerPC32. Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
git-mirror · Feb 22, 2009 · 60ce8f7 · 60ce8f7
1 parent fad4f47
commit 60ce8f7
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Showing 2 changed files with 7 additions and 3 deletions.
diff --git 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
@@ -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