Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 21 insertions, 27 deletions

diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 89eb5621ebb..c6a1ae36952 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -114,10 +114,8 @@ struct name_table {
 };
 
 static struct name_table table;
-static atomic_t rsv_publ_ok = ATOMIC_INIT(0);
 DEFINE_RWLOCK(tipc_nametbl_lock);
 
-
 static int hash(int x)
 {
 	return x & (tipc_nametbl_size - 1);
@@ -270,6 +268,13 @@ static struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
 		}
 
 		info = sseq->info;
+
+		/* Check if an identical publication already exists */
+		list_for_each_entry(publ, &info->zone_list, zone_list) {
+			if ((publ->ref == port) && (publ->key == key) &&
+			    (!publ->node || (publ->node == node)))
+				return NULL;
+		}
 	} else {
 		u32 inspos;
 		struct sub_seq *freesseq;
@@ -534,10 +539,17 @@ struct publication *tipc_nametbl_remove_publ(u32 type, u32 lower,
 }
 
 /*
- * tipc_nametbl_translate - translate name to port id
+ * tipc_nametbl_translate - perform name translation
+ *
+ * On entry, 'destnode' is the search domain used during translation.
  *
- * Note: on entry 'destnode' is the search domain used during translation;
- *       on exit it passes back the node address of the matching port (if any)
+ * On exit:
+ * - if name translation is deferred to another node/cluster/zone,
+ *   leaves 'destnode' unchanged (will be non-zero) and returns 0
+ * - if name translation is attempted and succeeds, sets 'destnode'
+ *   to publishing node and returns port reference (will be non-zero)
+ * - if name translation is attempted and fails, sets 'destnode' to 0
+ *   and returns 0
  */
 
 u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode)
@@ -547,6 +559,7 @@ u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode)
 	struct publication *publ;
 	struct name_seq *seq;
 	u32 ref = 0;
+	u32 node = 0;
 
 	if (!tipc_in_scope(*destnode, tipc_own_addr))
 		return 0;
@@ -604,11 +617,12 @@ u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode)
 	}
 
 	ref = publ->ref;
-	*destnode = publ->node;
+	node = publ->node;
 no_match:
 	spin_unlock_bh(&seq->lock);
 not_found:
 	read_unlock_bh(&tipc_nametbl_lock);
+	*destnode = node;
 	return ref;
 }
 
@@ -665,22 +679,7 @@ exit:
 	return res;
 }
 
-/**
- * tipc_nametbl_publish_rsv - publish port name using a reserved name type
- */
-
-int tipc_nametbl_publish_rsv(u32 ref, unsigned int scope,
-			struct tipc_name_seq const *seq)
-{
-	int res;
-
-	atomic_inc(&rsv_publ_ok);
-	res = tipc_publish(ref, scope, seq);
-	atomic_dec(&rsv_publ_ok);
-	return res;
-}
-
-/**
+/*
  * tipc_nametbl_publish - add name publication to network name tables
  */
 
@@ -694,11 +693,6 @@ struct publication *tipc_nametbl_publish(u32 type, u32 lower, u32 upper,
 		     tipc_max_publications);
 		return NULL;
 	}
-	if ((type < TIPC_RESERVED_TYPES) && !atomic_read(&rsv_publ_ok)) {
-		warn("Publication failed, reserved name {%u,%u,%u}\n",
-		     type, lower, upper);
-		return NULL;
-	}
 
 	write_lock_bh(&tipc_nametbl_lock);
 	table.local_publ_count++;