linux-kernel - [PATCH v3 0/3] tracing: add trace_seq

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Message-ID: <20240125222818.7425-1-ricardo@marliere.net>
Date: Thu, 25 Jan 2024 19:28:15 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: "Ricardo B. Marliere" <ricardo@...liere.net>,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Subject: [PATCH v3 0/3] tracing: add trace_seq_reset function

This series is a prerequisite for a later effort of making trace_seq more
flexible about its buffer size. To achieve that, initializing and resetting
the buffers need to be differentiated.

Changes in v3:
- Reordered commits so it doesn't produce a failing build in-between.
- Improved changelogs.

Changes in v2:
- Added a WARN_ON_ONCE to __trace_seq_init to catch possible misuses.
- Properly initialized trace_seq buffers.

Ricardo B. Marliere (3):
  tracing: initialize trace_seq buffers
  tracing: add trace_seq_reset function
  tracing: convert __trace_seq_init to use WARN_ON_ONCE

 include/linux/trace_seq.h    | 11 +++++++++++
 include/trace/trace_events.h |  2 +-
 kernel/trace/trace.c         | 24 +++++++++++++++++++-----
 kernel/trace/trace_output.c  |  2 +-
 kernel/trace/trace_seq.c     |  4 ++--
 5 files changed, 34 insertions(+), 9 deletions(-)

-- 
2.43.0