linux-kernel - [PATCH] tracing: remove unnecessary trace

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Message-Id: <20221209003310.1737039-1-zwisler@google.com>
Date:   Thu,  8 Dec 2022 17:33:10 -0700
From:   Ross Zwisler <zwisler@...omium.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Ross Zwisler <zwisler@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Trace Kernel <linux-trace-kernel@...r.kernel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        paulmck@...nel.org, Joel Fernandes <joel@...lfernandes.org>,
        Tom Zanussi <zanussi@...nel.org>
Subject: [PATCH] tracing: remove unnecessary trace_trigger ifdef

The trace_trigger command line option introduced by
commit a01fdc897fa5 ("tracing: Add trace_trigger kernel command line option")
doesn't need to depend on the CONFIG_HIST_TRIGGERS kernel config option.

This code doesn't depend on the histogram code, and the run-time
selection of triggers is usable without CONFIG_HIST_TRIGGERS.

Fixes: a01fdc897fa5 ("tracing: Add trace_trigger kernel command line option")
Signed-off-by: Ross Zwisler <zwisler@...gle.com>
---
 kernel/trace/trace_events.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 3bfaf560ecc4..33e0b4f8ebe6 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -2796,7 +2796,6 @@ trace_create_new_event(struct trace_event_call *call,
 	return file;
 }
 
-#ifdef CONFIG_HIST_TRIGGERS
 #define MAX_BOOT_TRIGGERS 32
 
 static struct boot_triggers {
@@ -2832,7 +2831,6 @@ static __init int setup_trace_triggers(char *str)
 	return 1;
 }
 __setup("trace_trigger=", setup_trace_triggers);
-#endif
 
 /* Add an event to a trace directory */
 static int
@@ -2850,7 +2848,6 @@ __trace_add_new_event(struct trace_event_call *call, struct trace_array *tr)
 		return event_define_fields(call);
 }
 
-#ifdef CONFIG_HIST_TRIGGERS
 static void trace_early_triggers(struct trace_event_file *file, const char *name)
 {
 	int ret;
@@ -2868,9 +2865,6 @@ static void trace_early_triggers(struct trace_event_file *file, const char *name
 			       bootup_triggers[i].event);
 	}
 }
-#else
-static inline void trace_early_triggers(struct trace_event_file *file, const char *name) { }
-#endif
 
 /*
  * Just create a descriptor for early init. A descriptor is required
-- 
2.39.0.rc1.256.g54fd8350bd-goog