linux-kernel - [PATCH 17/26] dynamic_debug: remove pending query when flags zeroed

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Date:	Fri,  7 Oct 2011 14:33:23 -0600
From:	jim.cromie@...il.com
To:	jbaron@...hat.com
Cc:	greg@...ah.com, joe@...ches.com, bart.vanassche@...il.com,
	linux-kernel@...r.kernel.org, Jim Cromie <jim.cromie@...il.com>
Subject: [PATCH 17/26] dynamic_debug: remove pending query when flags zeroed

From: Jim Cromie <jim.cromie@...il.com>

When a pending-query is resubmitted with zeroed flags, remove it
from pending-queries list.  The submission must have identical
match-specs, and like the original query, must have 'a' in the
filter-flags.  If other filter-flags are given, they must match
the query to be removed, but filter can be underspecified; "p"
will match against "pt".

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
 lib/dynamic_debug.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index a59d48c..0c9e53a 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -508,7 +508,14 @@ static int ddebug_save_pending(struct ddebug_query *query,
 
 	list_for_each_entry_safe(pq, pqnext, &pending_queries, link) {
 		if (queries_match(query, &pq->query)) {
-			/* query already in list, update flags */
+			/* query already in list */
+			if (!flags) {
+				/* zeroed flags, remove query */
+				vpr_info_pq(pq, "delete pending");
+				list_del_init(&pq->link);
+				pqfree(pq);
+				return 0;
+			}
 			if (pq->flags != flags)
 				pq->flags = flags;
 			if (pq->mask != mask)
-- 
1.7.4.4

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