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tracing/filter: Change count_leafs function to use walk_pred_tree

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Changing count_leafs function to use unified predicates tree
processing.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1313072754-4620-7-git-send-email-jolsa@redhat.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Jiri Olsa 2011-08-11 16:25:50 +02:00 committed by Steven Rostedt
parent f03f597994
commit c00b060f36
1 changed files with 15 additions and 34 deletions
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49
kernel/trace/trace_events_filter.c
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@ -1418,43 +1418,24 @@ static int check_pred_tree(struct event_filter *filter,
check_pred_tree_cb, &data);
}
static int count_leafs_cb(enum move_type move, struct filter_pred *pred,
int *err, void *data)
{
int *count = data;
if ((move == MOVE_DOWN) &&
(pred->left == FILTER_PRED_INVALID))
(*count)++;
return WALK_PRED_DEFAULT;
}
static int count_leafs(struct filter_pred *preds, struct filter_pred *root)
{
struct filter_pred *pred;
enum move_type move = MOVE_DOWN;
int count = 0;
int done = 0;
pred = root;
do {
switch (move) {
case MOVE_DOWN:
if (pred->left != FILTER_PRED_INVALID) {
pred = &preds[pred->left];
continue;
}
/* A leaf at the root is just a leaf in the tree */
if (pred == root)
return 1;
count++;
pred = get_pred_parent(pred, preds,
pred->parent, &move);
continue;
case MOVE_UP_FROM_LEFT:
pred = &preds[pred->right];
move = MOVE_DOWN;
continue;
case MOVE_UP_FROM_RIGHT:
if (pred == root)
break;
pred = get_pred_parent(pred, preds,
pred->parent, &move);
continue;
}
done = 1;
} while (!done);
int count = 0, ret;
ret = walk_pred_tree(preds, root, count_leafs_cb, &count);
WARN_ON(ret);
return count;
}