[dpdk-dev] [PATCH v4 09/10] net/ifc: clean LTO build warnings (maybe-uninitialized)

[Andrzej Ostruszka]

During LTO build compiler reports some 'false positive' warnings about
variables being possibly used uninitialized.  This patch silences these
warnings.

Exemplary compiler warning to suppress (with LTO enabled):
error: ‘features’ may be used uninitialized in this function
[-Werror=maybe-uninitialized]
  if (RTE_VHOST_NEED_LOG(features)) {

Signed-off-by: Andrzej Ostruszka <aostrus...@marvell.com>
---
 drivers/net/ifc/ifcvf_vdpa.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ifc/ifcvf_vdpa.c b/drivers/net/ifc/ifcvf_vdpa.c
index 8de9ef199..4cdff8712 100644
--- a/drivers/net/ifc/ifcvf_vdpa.c
+++ b/drivers/net/ifc/ifcvf_vdpa.c
@@ -304,8 +304,8 @@ vdpa_ifcvf_stop(struct ifcvf_internal *internal)
        struct ifcvf_hw *hw = &internal->hw;
        uint32_t i;
        int vid;
-       uint64_t features;
-       uint64_t log_base, log_size;
+       uint64_t features = 0;
+       uint64_t log_base = 0, log_size = 0;
        uint64_t len;
 
        vid = internal->vid;
@@ -348,6 +348,8 @@ vdpa_enable_vfio_intr(struct ifcvf_internal *internal, bool 
m_rx)
        struct rte_vhost_vring vring;
        int fd;
 
+       vring.callfd = -1;
+
        nr_vring = rte_vhost_get_vring_num(internal->vid);
 
        irq_set = (struct vfio_irq_set *)irq_set_buf;
@@ -442,6 +444,7 @@ notify_relay(void *arg)
        }
        internal->epfd = epfd;
 
+       vring.kickfd = -1;
        for (qid = 0; qid < q_num; qid++) {
                ev.events = EPOLLIN | EPOLLPRI;
                rte_vhost_get_vhost_vring(internal->vid, qid, &vring);
@@ -577,7 +580,7 @@ m_ifcvf_start(struct ifcvf_internal *internal)
        struct ifcvf_hw *hw = &internal->hw;
        uint32_t i, nr_vring;
        int vid, ret;
-       struct rte_vhost_vring vq;
+       struct rte_vhost_vring vq = { 0 };
        void *vring_buf;
        uint64_t m_vring_iova = IFCVF_MEDIATED_VRING;
        uint64_t size;
@@ -721,6 +724,7 @@ vring_relay(void *arg)
        }
        internal->epfd = epfd;
 
+       vring.kickfd = -1;
        for (qid = 0; qid < q_num; qid++) {
                ev.events = EPOLLIN | EPOLLPRI;
                rte_vhost_get_vhost_vring(vid, qid, &vring);
@@ -930,11 +934,11 @@ ifcvf_dev_close(int vid)
 static int
 ifcvf_set_features(int vid)
 {
-       uint64_t features;
+       uint64_t features = 0;
        int did;
        struct internal_list *list;
        struct ifcvf_internal *internal;
-       uint64_t log_base, log_size;
+       uint64_t log_base = 0, log_size = 0;
 
        did = rte_vhost_get_vdpa_device_id(vid);
        list = find_internal_resource_by_did(did);
-- 
2.17.1