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tracing/filter: Change fold_pred_tree 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/1313072754-4620-8-git-send-email-jolsa@redhat.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Jiri Olsa 2011-08-11 16:25:51 +02:00 committed by Steven Rostedt
parent c00b060f36
commit 1b797fe5aa
1 changed files with 20 additions and 45 deletions
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65
kernel/trace/trace_events_filter.c
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@ -1496,6 +1496,24 @@ static int fold_pred(struct filter_pred *preds, struct filter_pred *root)
return 0;
}
static int fold_pred_tree_cb(enum move_type move, struct filter_pred *pred,
int *err, void *data)
{
struct filter_pred *preds = data;
if (move != MOVE_DOWN)
return WALK_PRED_DEFAULT;
if (!(pred->index & FILTER_PRED_FOLD))
return WALK_PRED_DEFAULT;
*err = fold_pred(preds, pred);
if (*err)
return WALK_PRED_ABORT;
/* eveyrhing below is folded, continue with parent */
return WALK_PRED_PARENT;
}
/*
* To optimize the processing of the ops, if we have several "ors" or
* "ands" together, we can put them in an array and process them all
@ -1504,51 +1522,8 @@ static int fold_pred(struct filter_pred *preds, struct filter_pred *root)
static int fold_pred_tree(struct event_filter *filter,
struct filter_pred *root)
{
struct filter_pred *preds;
struct filter_pred *pred;
enum move_type move = MOVE_DOWN;
int done = 0;
int err;
preds = filter->preds;
if (!preds)
return -EINVAL;
pred = root;
do {
switch (move) {
case MOVE_DOWN:
if (pred->index & FILTER_PRED_FOLD) {
err = fold_pred(preds, pred);
if (err)
return err;
/* Folded nodes are like leafs */
} else 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)
break;
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;
return walk_pred_tree(filter->preds, root, fold_pred_tree_cb,
filter->preds);
}
static int replace_preds(struct ftrace_event_call *call,