From 4a48e173c310f84103984dce2b7202973db9e6fc Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (Red Hat)" Date: Tue, 24 Jun 2014 23:50:09 -0400 Subject: [PATCH] tracing: Remove ftrace_stop/start() from reading the trace file commit 099ed151675cd1d2dbeae1dac697975f6a68716d upstream. 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. Reviewed-by: Masami Hiramatsu Signed-off-by: Steven Rostedt Signed-off-by: Greg Kroah-Hartman --- kernel/trace/trace.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index e916972c6d872..1848dc6278b7b 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1367,7 +1367,6 @@ void tracing_start(void) arch_spin_unlock(&ftrace_max_lock); - ftrace_start(); out: raw_spin_unlock_irqrestore(&global_trace.start_lock, flags); } @@ -1414,7 +1413,6 @@ 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; -- 2.47.2