From: "Steven Rostedt (Red Hat)" <[email protected]> 3.12-stable review patch. If anyone has any objections, please let me know.
=============== 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 <[email protected]> Signed-off-by: Steven Rostedt <[email protected]> Signed-off-by: Jiri Slaby <[email protected]> --- kernel/trace/trace.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 24a74162e76f..57d7c64bb980 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1323,7 +1323,6 @@ void tracing_start(void) arch_spin_unlock(&ftrace_max_lock); - ftrace_start(); out: raw_spin_unlock_irqrestore(&global_trace.start_lock, flags); } @@ -1370,7 +1369,6 @@ 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; -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
