linux-kernel - [for-linus][PATCH 1/7] tracing: Initialize val to zero in parse

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Message-Id: <20200106211957.757088760@goodmis.org>
Date:   Mon, 06 Jan 2020 16:19:02 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     linux-kernel@...r.kernel.org
Cc:     Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        stable@...r.kernel.org, kbuild test robot <lkp@...el.com>
Subject: [for-linus][PATCH 1/7] tracing: Initialize val to zero in parse_entry of inject code

From: "Steven Rostedt (VMware)" <rostedt@...dmis.org>

gcc produces a variable may be uninitialized warning for "val" in
parse_entry(). This is really a false positive, but the code is subtle
enough to just initialize val to zero and it's not a fast path to worry
about it.

Marked for stable to remove the warning in the stable trees as well.

Cc: stable@...r.kernel.org
Fixes: 6c3edaf9fd6a3 ("tracing: Introduce trace event injection")
Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
---
 kernel/trace/trace_events_inject.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_events_inject.c b/kernel/trace/trace_events_inject.c
index d45079ee62f8..22bcf7c51d1e 100644
--- a/kernel/trace/trace_events_inject.c
+++ b/kernel/trace/trace_events_inject.c
@@ -195,7 +195,7 @@ static int parse_entry(char *str, struct trace_event_call *call, void **pentry)
 	unsigned long irq_flags;
 	void *entry = NULL;
 	int entry_size;
-	u64 val;
+	u64 val = 0;
 	int len;
 
 	entry = trace_alloc_entry(call, &entry_size);
-- 
2.24.0