ipc: fix unused variable warning

Commit a0d092f introduced the following warning:
ipc/msg.c: In function ?msgctl_down?:
ipc/msg.c:415: warning: ?msqid64? may be used uninitialized in this function

The gcc warning in this case is actually bogus, as msqid64 is touched only
iff cmd == IPC_SET, and in such case, copy_msqid_from_user() initializes
it properly.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/ipc/msg.c b/ipc/msg.c
index 2ceab7f..085bd58 100644 (file)
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -412,7 +412,7 @@ static int msgctl_down(struct ipc_namespace *ns, int msqid, int cmd,
                       struct msqid_ds __user *buf, int version)
 {
        struct kern_ipc_perm *ipcp;
-       struct msqid64_ds msqid64;
+       struct msqid64_ds uninitialized_var(msqid64);
        struct msg_queue *msq;
        int err;