Re: [PATCH v4 4/6] tracing: Guard __DECLARE_TRACE() use of __DO_TRACE_CALL() with SRCU-fast

[Steven Rostedt]

On Wed, 23 Jul 2025 15:17:52 -0700
"Paul E. McKenney" <paulmck@xxxxxxxxxx> wrote:

> I believe that Steve provided me with the essentials for perf and ftrace,
> but please check:  f808f53d4e4f ("squash! tracing: Guard __DECLARE_TRACE()
> use of __DO_TRACE_CALL() with SRCU-fast").

Note, there's nothing in the ftrace side that requires preemption disabled,
but it assumes that it is, and adjusts the preempt_count that is recorded
in the trace event to accommodate it.

-- Steve