linux-kernel - [PATCH 0/2] tracing: Clean up how iter is freed

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Date:   Thu, 13 Jul 2023 11:45:10 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     LKML <linux-kernel@...r.kernel.org>,
        Linux Trace Kernel <linux-trace-kernel@...r.kernel.org>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Zheng Yejian <zhengyejian1@...wei.com>
Subject: [PATCH 0/2] tracing: Clean up how iter is freed

The trace iterator is used in various interfaces and needs to be consistent
in how it is cleaned up. Add a helper function to clean up its content. But
before doing so, I noticed that iter->trace is allocated then the content
of tr->current_trace is copied to it. There's no reason for this, so the
first patch removes that allocation and just points to the content of
tr->current_trace, as tr->current_trace can change, but the content should
not.

Steven Rostedt (Google) (2):
      tracing: Remove unnecessary copying of tr->current_trace
      tracing: Add free_trace_iter_content() helper function
----
 kernel/trace/trace.c | 62 +++++++++++++++++++++++++++++++-------------------------------
 1 file changed, 31 insertions(+), 31 deletions(-)