[for-linus][PATCH 1/7] tracing: Initialize val to zero in parse_entry of inject code

From: Steven Rostedt
Date: Mon Jan 06 2020 - 16:20:01 EST

From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>

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@xxxxxxxxxxxxxxx
Fixes: 6c3edaf9fd6a3 ("tracing: Introduce trace event injection")
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
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);