[PATCH net] hv_sock: Suppress bogus "may be used uninitialized" warnings

From: Dexuan Cui <decui@microsoft.com>
To: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"davem@davemloft.net" <davem@davemloft.net>,
	Michael Kelley <mikelley@microsoft.com>
Cc: "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	KY Srinivasan <kys@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Sasha Levin <Alexander.Levin@microsoft.com>,
	"olaf@aepfle.de" <olaf@aepfle.de>,
	"apw@canonical.com" <apw@canonical.com>,
	"jasowang@redhat.com" <jasowang@redhat.com>,
	vkuznets <vkuznets@redhat.com>,
	"marcelo.cerri@canonical.com" <marcelo.cerri@canonical.com>,
	Dexuan Cui <decui@microsoft.com>
Subject: [PATCH net] hv_sock: Suppress bogus "may be used uninitialized" warnings
Date: Sat, 15 Jun 2019 05:00:57 +0000	[thread overview]
Message-ID: <1560574826-99551-1-git-send-email-decui@microsoft.com> (raw)

gcc 8.2.0 may report these bogus warnings under some condition:

warning: ‘vnew’ may be used uninitialized in this function
warning: ‘hvs_new’ may be used uninitialized in this function

Actually, the 2 pointers are only initialized and used if the variable
"conn_from_host" is true. The code is not buggy here.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
---
 net/vmw_vsock/hyperv_transport.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
index 8d1ea9eda8a2..cd3f47f54fa7 100644
--- a/net/vmw_vsock/hyperv_transport.c
+++ b/net/vmw_vsock/hyperv_transport.c
@@ -329,8 +329,8 @@ static void hvs_open_connection(struct vmbus_channel *chan)
 
 	struct sockaddr_vm addr;
 	struct sock *sk, *new = NULL;
-	struct vsock_sock *vnew;
-	struct hvsock *hvs, *hvs_new;
+	struct vsock_sock *vnew = NULL;
+	struct hvsock *hvs, *hvs_new = NULL;
 	int ret;
 
 	if_type = &chan->offermsg.offer.if_type;
-- 
2.19.1

