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docs/trace: fix a label of boottime-trace

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Commit 5597895392 ("Documentation: tracing: Add histogram syntax to
boot-time tracing") introduced a warning:

linux/Documentation/trace/boottime-trace.rst:136: WARNING: undefined label: histogram (if the link has no caption the label must precede a section header)

Replace with: (path)

Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Fixes: 5597895392 ("Documentation: tracing: Add histogram syntax to boot-time tracing")
Link: https://lore.kernel.org/r/20211210041536.1446734-1-siyanteng@loongson.cn
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Yanteng Si 2021-12-10 12:15:36 +08:00 committed by Jonathan Corbet
parent a7fb920b15
commit 0dc9159222
1 changed files with 1 additions and 3 deletions
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Documentation/trace/boottime-trace.rst
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@ -131,9 +131,7 @@ Ftrace Histogram Options
Since it is too long to write a histogram action as a string for per-event Since it is too long to write a histogram action as a string for per-event
action option, there are tree-style options under per-event 'hist' subkey action option, there are tree-style options under per-event 'hist' subkey
for the histogram actions. For the detail of the each parameter, for the histogram actions. For the detail of the each parameter,
please read the event histogram document [3]_. please read the event histogram document (Documentation/trace/histogram.rst)
.. [3] See :ref:`Documentation/trace/histogram.rst <histogram>`
ftrace.[instance.INSTANCE.]event.GROUP.EVENT.hist.[N.]keys = KEY1[, KEY2[...]] ftrace.[instance.INSTANCE.]event.GROUP.EVENT.hist.[N.]keys = KEY1[, KEY2[...]]
Set histogram key parameters. (Mandatory) Set histogram key parameters. (Mandatory)