ipc: fix wrong comments
This patch fixes the wrong / obsolete comments in the ipc code. Also adds
a missing lock around ipc_get_maxid() in shm_get_stat().
Signed-off-by: Nadia Derbey <Nadia.Derbey@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/ipc/msg.c b/ipc/msg.c
index 9f54582..b7274db 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -156,6 +156,13 @@
ipc_rmid(&msg_ids(ns), &s->q_perm);
}
+/**
+ * newque - Create a new msg queue
+ * @ns: namespace
+ * @params: ptr to the structure that contains the key and msgflg
+ *
+ * Called with msg_ids.mutex held
+ */
static int newque(struct ipc_namespace *ns, struct ipc_params *params)
{
struct msg_queue *msq;
@@ -250,8 +257,8 @@
/*
* freeque() wakes up waiters on the sender and receiver waiting queue,
- * removes the message queue from message queue ID
- * IDR, and cleans up all the messages associated with this queue.
+ * removes the message queue from message queue ID IDR, and cleans up all the
+ * messages associated with this queue.
*
* msg_ids.mutex and the spinlock for this message queue are held
* before freeque() is called. msg_ids.mutex remains locked on exit.
@@ -278,6 +285,9 @@
ipc_rcu_putref(msq);
}
+/*
+ * Called with msg_ids.mutex and ipcp locked.
+ */
static inline int msg_security(struct kern_ipc_perm *ipcp, int msgflg)
{
struct msg_queue *msq = container_of(ipcp, struct msg_queue, q_perm);