linux-kernel - [PATCH v2 1/9] tracing/boot: Fix a hist trigger dependency for boot time tracing

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Message-Id: <162818072887.226227.1489690774195740861.stgit@devnote2>
Date:   Fri,  6 Aug 2021 01:25:29 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org, Tom Zanussi <zanussi@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>
Subject: [PATCH v2 1/9] tracing/boot: Fix a hist trigger dependency for boot time tracing

Fixes a build error when CONFIG_HIST_TRIGGERS=n with boot-time
tracing. Since the trigger_process_regex() is defined only
when CONFIG_HIST_TRIGGERS=y, if it is disabled, the 'actions'
event option also must be disabled.

Fixes: 81a59555ff15 ("tracing/boot: Add per-event settings")
Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
---
 0 files changed

diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index 94ef2d099e32..e6dc9269ad75 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -204,13 +204,14 @@ trace_boot_init_one_event(struct trace_array *tr, struct xbc_node *gnode,
 		else if (apply_event_filter(file, buf) < 0)
 			pr_err("Failed to apply filter: %s\n", buf);
 	}
-
+#ifdef CONFIG_HIST_TRIGGERS
 	xbc_node_for_each_array_value(enode, "actions", anode, p) {
 		if (strlcpy(buf, p, ARRAY_SIZE(buf)) >= ARRAY_SIZE(buf))
 			pr_err("action string is too long: %s\n", p);
 		else if (trigger_process_regex(file, buf) < 0)
 			pr_err("Failed to apply an action: %s\n", buf);
 	}
+#endif
 
 	if (xbc_node_find_value(enode, "enable", NULL)) {
 		if (trace_event_enable_disable(file, 1, 0) < 0)