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| author | Leo Yan <leo.yan@linaro.org> | 2022-10-08 08:32:50 +0000 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2022-10-10 12:50:53 -0600 |
| commit | 9c1ab6d54a2e9e59b8922d12145d895e7f88b62c (patch) | |
| tree | eea1901186b672c28a27b833671b6c1db897ed46 /Documentation/trace | |
| parent | 69d517e6e21099f81efbd39e47874649ae575804 (diff) | |
| download | lwn-9c1ab6d54a2e9e59b8922d12145d895e7f88b62c.tar.gz lwn-9c1ab6d54a2e9e59b8922d12145d895e7f88b62c.zip | |
docs: ftrace: Correct access mode
The documentation gives an example for opening trace marker with
write-only mode, but the flag WR_ONLY is not defined by glibc.
Use O_WRONLY to replace it.
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20221008083250.3160-1-leo.yan@linaro.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/trace')
| -rw-r--r-- | Documentation/trace/ftrace.rst | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst index b37dc19e4d40..60bceb018d6a 100644 --- a/Documentation/trace/ftrace.rst +++ b/Documentation/trace/ftrace.rst @@ -564,7 +564,7 @@ of ftrace. Here is a list of some of the key files: start:: - trace_fd = open("trace_marker", WR_ONLY); + trace_fd = open("trace_marker", O_WRONLY); Note: Writing into the trace_marker file can also initiate triggers that are written into /sys/kernel/tracing/events/ftrace/print/trigger |