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X-Received-From: 2607:f8b0:400e:c00::236 Subject: [Qemu-devel] [PATCH v4 03/12] migration: remove unnecessary variables len in QIOChannelRDMA X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lidong Chen , adido@mellanox.com, qemu-devel@nongnu.org, Lidong Chen Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 From: Lidong Chen Because qio_channel_rdma_writev and qio_channel_rdma_readv maybe invoked by different threads concurrently, this patch removes unnecessary variables len in QIOChannelRDMA and use local variable instead. Signed-off-by: Lidong Chen Reviewed-by: Dr. David Alan Gilbert Reviewed-by: Daniel P. Berrang=C3=A9 --- migration/rdma.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/migration/rdma.c b/migration/rdma.c index ec4bbff..9b6da4d 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -404,7 +404,6 @@ struct QIOChannelRDMA { QIOChannel parent; RDMAContext *rdma; QEMUFile *file; - size_t len; bool blocking; /* XXX we don't actually honour this yet */ }; =20 @@ -2643,6 +2642,7 @@ static ssize_t qio_channel_rdma_writev(QIOChannel *io= c, int ret; ssize_t done =3D 0; size_t i; + size_t len =3D 0; =20 CHECK_ERROR_STATE(); =20 @@ -2662,10 +2662,10 @@ static ssize_t qio_channel_rdma_writev(QIOChannel *= ioc, while (remaining) { RDMAControlHeader head; =20 - rioc->len =3D MIN(remaining, RDMA_SEND_INCREMENT); - remaining -=3D rioc->len; + len =3D MIN(remaining, RDMA_SEND_INCREMENT); + remaining -=3D len; =20 - head.len =3D rioc->len; + head.len =3D len; head.type =3D RDMA_CONTROL_QEMU_FILE; =20 ret =3D qemu_rdma_exchange_send(rdma, &head, data, NULL, NULL,= NULL); @@ -2675,8 +2675,8 @@ static ssize_t qio_channel_rdma_writev(QIOChannel *io= c, return ret; } =20 - data +=3D rioc->len; - done +=3D rioc->len; + data +=3D len; + done +=3D len; } } =20 @@ -2771,8 +2771,7 @@ static ssize_t qio_channel_rdma_readv(QIOChannel *ioc, } } } - rioc->len =3D done; - return rioc->len; + return done; } =20 /* --=20 1.8.3.1