Hi Steven,
On Wed, Jun 17, 2015 at 08:36:38AM -0400, Steven Rostedt wrote:
...
> diff --git a/kernel/trace/trace_events_filter.c
> b/kernel/trace/trace_events_filter.c
> index ced69da0ff55..7f2e97ce71a7 100644
> --- a/kernel/trace/trace_events_filter.c
> +++ b/kernel/trace/trace_events_filter.c
> @@ -1369,19 +1369,26 @@ static int check_preds(struct filter_parse_state *ps)
> {
> int n_normal_preds = 0, n_logical_preds = 0;
> struct postfix_elt *elt;
> + int cnt = 0;
>
> list_for_each_entry(elt, &ps->postfix, list) {
> - if (elt->op == OP_NONE)
> + if (elt->op == OP_NONE) {
> + cnt++;
> continue;
> + }
>
> if (elt->op == OP_AND || elt->op == OP_OR) {
> n_logical_preds++;
> + cnt--;
> continue;
> }
> + if (elt->op != OP_NOT)
> + cnt--;
Since the OP_NOT was introduced only with e12c09cf3087 ("tracing: Add
NOT to filtering logic"), how would stable kernels backport this fix?
Do you think that just dropping the 'if' and do the 'cnt--'
unconditionally would be ok?
Cheers,
--
Luís
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