diff options
| -rw-r--r-- | kernel/trace/trace.h | 2 | ||||
| -rw-r--r-- | kernel/trace/trace_events_filter.c | 31 |
2 files changed, 10 insertions, 23 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 441fc1b..254d04a 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -663,7 +663,7 @@ struct ftrace_event_field { struct event_filter { int n_preds; /* Number assigned */ int a_preds; /* allocated */ - struct filter_pred **preds; + struct filter_pred *preds; char *filter_string; }; diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 8f00a11..b6c9106 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -362,7 +362,7 @@ int filter_match_preds(struct event_filter *filter, void *rec) { int match = -1, top = 0, val1 = 0, val2 = 0; int stack[MAX_FILTER_PRED]; - struct filter_pred **preds; + struct filter_pred *preds; struct filter_pred *pred; int n_preds = ACCESS_ONCE(filter->n_preds); int i; @@ -377,7 +377,7 @@ int filter_match_preds(struct event_filter *filter, void *rec) preds = rcu_dereference_sched(filter->preds); for (i = 0; i < n_preds; i++) { - pred = preds[i]; + pred = &preds[i]; if (!pred->pop_n) { match = pred->fn(pred, rec); stack[top++] = match; @@ -559,10 +559,8 @@ static void __free_preds(struct event_filter *filter) int i; if (filter->preds) { - for (i = 0; i < filter->a_preds; i++) { - if (filter->preds[i]) - filter_free_pred(filter->preds[i]); - } + for (i = 0; i < filter->a_preds; i++) + kfree(filter->preds[i].field_name); kfree(filter->preds); filter->preds = NULL; } @@ -572,7 +570,6 @@ static void __free_preds(struct event_filter *filter) static void reset_preds(struct event_filter *filter) { - struct filter_pred *pred; int n_preds = filter->n_preds; int i; @@ -580,10 +577,8 @@ static void reset_preds(struct event_filter *filter) if (!filter->preds) return; - for (i = 0; i < n_preds; i++) { - pred = filter->preds[i]; - pred->fn = filter_pred_none; - } + for (i = 0; i < n_preds; i++) + filter->preds[i].fn = filter_pred_none; } static void filter_disable_preds(struct ftrace_event_call *call) @@ -658,19 +653,11 @@ static int __alloc_preds(struct event_filter *filter, int n_preds) return -EINVAL; for (i = 0; i < n_preds; i++) { - pred = filter->preds[i]; - if (!pred) - pred = kzalloc(sizeof(*pred), GFP_KERNEL); - if (!pred) - goto oom; + pred = &filter->preds[i]; pred->fn = filter_pred_none; - filter->preds[i] = pred; } return 0; - oom: - __free_preds(filter); - return -ENOMEM; } static int init_filter(struct ftrace_event_call *call) @@ -730,8 +717,8 @@ static int filter_add_pred_fn(struct filter_parse_state *ps, } idx = filter->n_preds; - filter_clear_pred(filter->preds[idx]); - err = filter_set_pred(filter->preds[idx], pred, fn); + filter_clear_pred(&filter->preds[idx]); + err = filter_set_pred(&filter->preds[idx], pred, fn); if (err) return err; |