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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2014-06-24 23:50:09 -0400
committerSteven Rostedt <rostedt@goodmis.org>2014-07-01 12:45:54 -0400
commit099ed151675cd1d2dbeae1dac697975f6a68716d (patch)
tree77b8216988011039ce566aea36322fc6a61106e9 /kernel/trace
parentfb6bab6a5ad46d00b5ffa22268f21df1cd7c59df (diff)
downloadlinux-099ed151675cd1d2dbeae1dac697975f6a68716d.tar.bz2
tracing: Remove ftrace_stop/start() from reading the trace file
Disabling reading and writing to the trace file should not be able to disable all function tracing callbacks. There's other users today (like kprobes and perf). Reading a trace file should not stop those from happening. Cc: stable@vger.kernel.org # 3.0+ Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 384ede311717..f243444a3772 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1396,7 +1396,6 @@ void tracing_start(void)
arch_spin_unlock(&global_trace.max_lock);
- ftrace_start();
out:
raw_spin_unlock_irqrestore(&global_trace.start_lock, flags);
}
@@ -1443,7 +1442,6 @@ void tracing_stop(void)
struct ring_buffer *buffer;
unsigned long flags;
- ftrace_stop();
raw_spin_lock_irqsave(&global_trace.start_lock, flags);
if (global_trace.stop_count++)
goto out;