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authorSteven Rostedt <rostedt@goodmis.org>2008-11-26 00:16:24 -0500
committerIngo Molnar <mingo@elte.hu>2008-11-26 06:52:54 +0100
commit5a45cfe1c64862e8cd3b0d79d7c4ba71c3118915 (patch)
tree0a7edf3a9dc88d74b7c7053445ac8aff033a75fa /include/linux
parentdf4fc31558dd2a3a30292ddb3a64c2a5befcec73 (diff)
ftrace: use code patching for ftrace graph tracer
Impact: more efficient code for ftrace graph tracer This patch uses the dynamic patching, when available, to patch the function graph code into the kernel. This patch will ease the way for letting both function tracing and function graph tracing run together. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/ftrace.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index fc2d5498719..f9792c0d73f 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -117,6 +117,11 @@ extern void ftrace_call(void);
extern void mcount_call(void);
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
extern void ftrace_graph_caller(void);
+extern int ftrace_enable_ftrace_graph_caller(void);
+extern int ftrace_disable_ftrace_graph_caller(void);
+#else
+static inline int ftrace_enable_ftrace_graph_caller(void) { return 0; }
+static inline int ftrace_disable_ftrace_graph_caller(void) { return 0; }
#endif
/**