From: Steven Rostedt <rostedt@kernel.org>
To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH 05/12] tracing: Make printk_trace global for tracing system
Date: Fri, 06 Feb 2026 14:37:46 -0500 [thread overview]
Message-ID: <20260206195935.625485805@kernel.org> (raw)
In-Reply-To: 20260206193741.767171392@kernel.org
From: Steven Rostedt <rostedt@goodmis.org>
The printk_trace is used to determine which trace_array trace_printk()
writes to. By making it a global variable among the tracing subsystem it
will allow the trace_printk functions to be moved out of trace.c and still
have direct access to that variable.
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
kernel/trace/trace.c | 2 +-
kernel/trace/trace.h | 2 ++
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 061c154c0618..1170fcf686a6 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -534,7 +534,7 @@ static struct trace_array global_trace = {
.trace_flags = TRACE_DEFAULT_FLAGS,
};
-static struct trace_array *printk_trace = &global_trace;
+struct trace_array *printk_trace = &global_trace;
/* List of trace_arrays interested in the top level trace_marker */
static LIST_HEAD(marker_copies);
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 63260595ac8f..73a2ab195114 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -487,6 +487,8 @@ extern bool trace_clock_in_ns(struct trace_array *tr);
extern unsigned long trace_adjust_address(struct trace_array *tr, unsigned long addr);
+extern struct trace_array *printk_trace;
+
/*
* The global tracer (top) should be the first trace array added,
* but we check the flag anyway.
--
2.51.0
next prev parent reply other threads:[~2026-02-06 19:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-06 19:37 [PATCH 00/12] tracing: Clean up trace.c and move some code into other files Steven Rostedt
2026-02-06 19:37 ` [PATCH 01/12] tracing: Make tracing_disabled global for tracing system Steven Rostedt
2026-02-06 19:37 ` [PATCH 02/12] tracing: Make tracing_selftest_running global to the tracing subsystem Steven Rostedt
2026-02-06 19:37 ` [PATCH 03/12] tracing: Move __trace_buffer_{un}lock_*() functions to trace.h Steven Rostedt
2026-02-06 19:37 ` [PATCH 04/12] tracing: Move ftrace_trace_stack() out of trace.c and into trace.h Steven Rostedt
2026-02-06 19:37 ` Steven Rostedt [this message]
2026-02-06 19:37 ` [PATCH 06/12] tracing: Make tracing_update_buffers() take NULL for global_trace Steven Rostedt
2026-02-06 19:37 ` [PATCH 07/12] tracing: Have trace_printk functions use flags instead of using global_trace Steven Rostedt
2026-02-06 19:37 ` [PATCH 08/12] tracing: Use system_state in trace_printk_init_buffers() Steven Rostedt
2026-02-06 19:37 ` [PATCH 09/12] tracing: Move trace_printk functions out of trace.c and into trace_printk.c Steven Rostedt
2026-02-06 19:37 ` [PATCH 10/12] tracing: Move pid filtering into trace_pid.c Steven Rostedt
2026-02-06 19:37 ` [PATCH 11/12] tracing: Move tracing_set_filter_buffering() into trace_events_hist.c Steven Rostedt
2026-02-06 19:37 ` [PATCH 12/12] tracing: Move snapshot code out of trace.c and into trace_snapshot.c Steven Rostedt
2026-02-07 14:56 ` [PATCH 00/12] tracing: Clean up trace.c and move some code into other files Steven Rostedt
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