linux-kernel - [PATCH 09/20] tracing/filter: Change count_leafs function to use walk_pred

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 10 Oct 2011 09:39:01 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	linux-kernel@...r.kernel.org
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH 09/20] tracing/filter: Change count_leafs function to use walk_pred_tree

From: Jiri Olsa <jolsa@...hat.com>

Changing count_leafs function to use unified predicates tree
processing.

Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Link: http://lkml.kernel.org/r/1313072754-4620-7-git-send-email-jolsa@redhat.com
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
 kernel/trace/trace_events_filter.c |   47 ++++++++++-------------------------
 1 files changed, 14 insertions(+), 33 deletions(-)

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 5b889d4..ebbb261 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -1418,43 +1418,24 @@ static int check_pred_tree(struct event_filter *filter,
 			      check_pred_tree_cb, &data);
 }
 
-static int count_leafs(struct filter_pred *preds, struct filter_pred *root)
+static int count_leafs_cb(enum move_type move, struct filter_pred *pred,
+			  int *err, void *data)
 {
-	struct filter_pred *pred;
-	enum move_type move = MOVE_DOWN;
-	int count = 0;
-	int done = 0;
+	int *count = data;
 
-	pred = root;
+	if ((move == MOVE_DOWN) &&
+	    (pred->left == FILTER_PRED_INVALID))
+		(*count)++;
 
-	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);
+	return WALK_PRED_DEFAULT;
+}
+
+static int count_leafs(struct filter_pred *preds, struct filter_pred *root)
+{
+	int count = 0, ret;
 
+	ret = walk_pred_tree(preds, root, count_leafs_cb, &count);
+	WARN_ON(ret);
 	return count;
 }
 
-- 
1.7.6.3



Download attachment "signature.asc" of type "application/pgp-signature" (837 bytes)