tracing: Separate hist state updates from hist registration

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hist_register_trigger() handles both new hist registration as well as
existing hist registration through event_command.reg().

Adding a new function, existing_hist_update_only(), that checks and
updates existing histograms and exits after doing so allows the
confusing logic in event_hist_trigger_parse() to be simplified.

Link: https://lkml.kernel.org/r/211b2cd3e3d7e00f4f8ad45ef8b33063da6a7e05.1644010576.git.zanussi@kernel.org

Signed-off-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

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Tom Zanussi 2022-02-04 16:12:07 -06:00 • committed by Steven Rostedt (Google)

parent e1f187d09e

commit a7e6b7dcfb

1 changed files with 48 additions and 18 deletions

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66

kernel/trace/trace_events_hist.c

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