linux-kernel - [for-next][PATCH 25/31] tracing: Remove unused buffer_page field from trace_array

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Message-ID: <20250509131317.688383909@goodmis.org>
Date: Fri, 09 May 2025 09:13:14 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
 Mark Rutland <mark.rutland@....com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Andrew Morton <akpm@...ux-foundation.org>
Subject: [for-next][PATCH 25/31] tracing: Remove unused buffer_page field from trace_array_cpu
 structure

From: Steven Rostedt <rostedt@...dmis.org>

The trace_array_cpu had a "buffer_page" field that was originally going to
be used as a backup page for the ring buffer. But the ring buffer has its
own way of reusing pages and this field was never used.

Remove it.

Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Link: https://lore.kernel.org/20250505212236.738849456@goodmis.org
Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
 kernel/trace/trace.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 188032d4ab69..4e67ee92e05c 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -184,7 +184,6 @@ struct trace_array;
  */
 struct trace_array_cpu {
 	local_t			disabled;
-	void			*buffer_page;	/* ring buffer spare */
 
 	unsigned long		entries;
 	unsigned long		saved_latency;
-- 
2.47.2