tracing: Add WARN_ON_ONCE when returned value is negative

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ret is assigned return value of event_hist_trigger_func, but the value
is unused. It is better to warn when returned value is negative,
rather than just ignoring it.

Link: https://lkml.kernel.org/r/20210529061423.GA103954@hyeyoo

Signed-off-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

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Hyeonggon Yoo 2021-05-29 15:14:23 +09:00 • committed by Steven Rostedt (VMware)

parent 099dcc1801

commit 6c610dba6e

1 changed files with 1 additions and 0 deletions

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kernel/trace/trace_events_hist.c

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