CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by CONFIG_PREEMPT_RT. Both PREEMPT and PREEMPT_RT require the same functionality which today depends on CONFIG_PREEMPT.
Add additional header output for PREEMPT_RT. Cc: Steven Rostedt <rost...@goodmis.org> Cc: Ingo Molnar <mi...@redhat.com> Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de> --- Documentation/trace/ftrace-uses.rst | 2 +- kernel/trace/trace.c | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/trace/ftrace-uses.rst b/Documentation/trace/ftrace-uses.rst index 1fbc69894eed0..1e0020b0bc745 100644 --- a/Documentation/trace/ftrace-uses.rst +++ b/Documentation/trace/ftrace-uses.rst @@ -146,7 +146,7 @@ FTRACE_OPS_FL_RECURSION_SAFE itself or any nested functions that those functions call. If this flag is set, it is possible that the callback will also - be called with preemption enabled (when CONFIG_PREEMPT is set), + be called with preemption enabled (when CONFIG_PREEMPTION is set), but this is not guaranteed. FTRACE_OPS_FL_IPMODIFY diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 6a0ee91783656..c13caba27c368 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3654,6 +3654,8 @@ print_trace_header(struct seq_file *m, struct trace_iterator *iter) "desktop", #elif defined(CONFIG_PREEMPT) "preempt", +#elif defined(CONFIG_PREEMPT_RT) + "preempt_rt", #else "unknown", #endif -- 2.23.0