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tracing/filter: Change fold_pred function to use walk_pred_tree 

Changing fold_pred_tree function to use unified predicates tree
processing.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1313072754-4620-9-git-send-email-jolsa@redhat.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Jiri Olsa 2011-08-11 16:25:52 +02:00 committed by Steven Rostedt
parent 1b797fe5aa
commit 96bc293a97
1 changed files with 33 additions and 35 deletions
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68
kernel/trace/trace_events_filter.c
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@ -1439,13 +1439,40 @@ static int count_leafs(struct filter_pred *preds, struct filter_pred *root)
return count;
}
struct fold_pred_data {
struct filter_pred *root;
int count;
int children;
};
static int fold_pred_cb(enum move_type move, struct filter_pred *pred,
int *err, void *data)
{
struct fold_pred_data *d = data;
struct filter_pred *root = d->root;
if (move != MOVE_DOWN)
return WALK_PRED_DEFAULT;
if (pred->left != FILTER_PRED_INVALID)
return WALK_PRED_DEFAULT;
if (WARN_ON(d->count == d->children)) {
*err = -EINVAL;
return WALK_PRED_ABORT;
}
pred->index &= ~FILTER_PRED_FOLD;
root->ops[d->count++] = pred->index;
return WALK_PRED_DEFAULT;
}
static int fold_pred(struct filter_pred *preds, struct filter_pred *root)
{
struct filter_pred *pred;
enum move_type move = MOVE_DOWN;
int count = 0;
struct fold_pred_data data = {
.root = root,
.count = 0,
};
int children;
int done = 0;
/* No need to keep the fold flag */
root->index &= ~FILTER_PRED_FOLD;
@ -1463,37 +1490,8 @@ static int fold_pred(struct filter_pred *preds, struct filter_pred *root)
return -ENOMEM;
root->val = children;
pred = root;
do {
switch (move) {
case MOVE_DOWN:
if (pred->left != FILTER_PRED_INVALID) {
pred = &preds[pred->left];
continue;
}
if (WARN_ON(count == children))
return -EINVAL;
pred->index &= ~FILTER_PRED_FOLD;
root->ops[count++] = pred->index;
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);
return 0;
data.children = children;
return walk_pred_tree(preds, root, fold_pred_cb, &data);
}
static int fold_pred_tree_cb(enum move_type move, struct filter_pred *pred,