Messages in this thread | | | Date | Wed, 12 Jul 2017 09:45:01 -0400 | From | Steven Rostedt <> | Subject | Re: [PATCH 2/2] ftrace: silence uninitialized variable warning |
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On Wed, 12 Jul 2017 10:35:57 +0300 Dan Carpenter <dan.carpenter@oracle.com> wrote:
> My static checker complains that if "func" is NULL then "clear_filter" > is uninitialized. This seems like it could be true, although it's > possible something subtle is happening that I haven't seen. > > kernel/trace/ftrace.c:3844 match_records() > error: uninitialized symbol 'clear_filter'. > > Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> > --- > It does occur to me that I could initialize it to 1 instead of 0 but my > guess is that zero is intended. Please review this one carefully.
Looks like it broke with f0a3b154bd7 ("ftrace: Clarify code for mod command"). Yeah, clear_filter = 0 is the correct default.
Thanks!
-- Steve
> > diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c > index 2a3c45743f54..5e658da91912 100644 > --- a/kernel/trace/ftrace.c > +++ b/kernel/trace/ftrace.c > @@ -3816,7 +3816,7 @@ match_records(struct ftrace_hash *hash, char *func, int len, char *mod) > int exclude_mod = 0; > int found = 0; > int ret; > - int clear_filter; > + int clear_filter = 0; > > if (func) { > func_g.type = filter_parse_regex(func, len, &func_g.search,
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