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authorSteven Rostedt <srostedt@redhat.com>2008-12-02 23:50:05 -0500
committerIngo Molnar <mingo@elte.hu>2008-12-03 08:56:26 +0100
commite49dc19c6a19ea112fcb94b7c62ec62cdd5c08aa (patch)
tree851dcdfe321e16a327d656ecd7040ef6e8590bec /arch/x86/kernel/entry_64.S
parent7ee991fbc6f947e9b04f29c9c6c1d057d0671a16 (diff)
ftrace: function graph return for function entry
Impact: feature, let entry function decide to trace or not This patch lets the graph tracer entry function decide if the tracing should be done at the end as well. This requires all function graph entry functions return 1 if it should trace, or 0 if the return should not be traced. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/entry_64.S')
-rw-r--r--arch/x86/kernel/entry_64.S3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 9060ba6497e..54e0bbdccb9 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -120,6 +120,9 @@ ENTRY(mcount)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
cmpq $ftrace_stub, ftrace_graph_return
jnz ftrace_graph_caller
+
+ cmpq $ftrace_graph_entry_stub, ftrace_graph_entry
+ jnz ftrace_graph_caller
#endif
.globl ftrace_stub