Commit 93c88d06 authored Feb 07, 2026 by Steven Rostedt Committed by Steven Rostedt (Google) Feb 08, 2026

tracing: Make tracing_update_buffers() take NULL for global_trace

The trace.c file has become a dumping ground for all tracing code and has
become quite large. In order to move the trace_printk functions out of it
these functions can not access global_trace directly, as that is something
that needs to stay static in trace.c.

Have tracing_update_buffers() take NULL for its trace_array to denote it
should work on the global_trace top level trace_array allows that function
to be used outside of trace.c and still update the global_trace
trace_array.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: https://patch.msgid.link/20260208032450.318864210@kernel.org


Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

parent 1c53d781

kernel/trace/trace.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -3234,7 +3234,7 @@ void trace_printk_init_buffers(void)
		pr_warn("**********************************************************\n");

		/* Expand the buffers to set size */
		if (tracing_update_buffers(&global_trace) < 0)
		if (tracing_update_buffers(NULL) < 0)
		pr_err("Failed to expand tracing buffers for trace_printk() calls\n");
		else
		buffers_allocated = 1;
		@@ -6186,6 +6186,9 @@ int tracing_update_buffers(struct trace_array *tr)
		{
		int ret = 0;

		if (!tr)
		tr = &global_trace;

		guard(mutex)(&trace_types_lock);

		update_last_data(tr);