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authorFrederic Weisbecker <fweisbec@gmail.com>2009-02-08 00:04:02 +0100
committerIngo Molnar <mingo@elte.hu>2009-02-09 10:51:38 +0100
commit3861a17bcc0af815f684c6178bc9ec2d790c350e (patch)
treee5ab19215ea802a0c57279cd6dd89f68347b53b4 /arch
parent1292211058aaf872eeb2a0e2677d237916b4501f (diff)
tracing/function-graph-tracer: drop the kernel_text_address check
When the function graph tracer picks a return address, it ensures this address is really a kernel text one by calling __kernel_text_address() Actually this path has never been taken.Its role was more likely to debug the tracer on the beginning of its development but this function is wasteful since it is called for every traced function. The fault check is already sufficient. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/ftrace.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index d74d75e0952..18828aee878 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -491,13 +491,6 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr)
return;
}
- if (unlikely(!__kernel_text_address(old))) {
- ftrace_graph_stop();
- *parent = old;
- WARN_ON(1);
- return;
- }
-
calltime = cpu_clock(raw_smp_processor_id());
if (push_return_trace(old, calltime,