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docs/trace: fix a label of boottime-trace 

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
action option, there are tree-style options under per-event 'hist' subkey
for the histogram actions. For the detail of the each parameter,
please read the event histogram document [3]_.
.. [3] See :ref:`Documentation/trace/histogram.rst <histogram>`
please read the event histogram document (Documentation/trace/histogram.rst)
ftrace.[instance.INSTANCE.]event.GROUP.EVENT.hist.[N.]keys = KEY1[, KEY2[...]]
Set histogram key parameters. (Mandatory)