Removed unused variables and added MSVC specific compiler flag to
ignore warnings about unused variables, like is being done for
other compilers.

Signed-off-by: Andre Muezerie <andre...@linux.microsoft.com>
---
 drivers/common/idpf/base/meson.build       | 13 ++++++++++---
 drivers/common/idpf/idpf_common_rxtx.c     |  2 --
 drivers/common/idpf/idpf_common_virtchnl.c |  4 ++--
 drivers/common/sfc_efx/base/efx_mae.c      |  2 +-
 drivers/common/sfc_efx/base/efx_table.c    |  1 -
 drivers/common/sfc_efx/base/meson.build    | 20 +++++++++++++-------
 6 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/drivers/common/idpf/base/meson.build 
b/drivers/common/idpf/base/meson.build
index f30ec7dfc2..c069507f12 100644
--- a/drivers/common/idpf/base/meson.build
+++ b/drivers/common/idpf/base/meson.build
@@ -6,9 +6,16 @@ sources += files(
         'idpf_controlq_setup.c',
 )
 
-error_cflags = [
-        '-Wno-unused-variable',
-]
+if is_ms_compiler
+    error_cflags = [
+            '/wd4101', # unreferenced local variable
+    ]
+else
+    error_cflags = [
+            '-Wno-unused-variable',
+    ]
+endif
+
 foreach flag: error_cflags
     if cc.has_argument(flag)
         cflags += flag
diff --git a/drivers/common/idpf/idpf_common_rxtx.c 
b/drivers/common/idpf/idpf_common_rxtx.c
index a04e54ce26..9b17279181 100644
--- a/drivers/common/idpf/idpf_common_rxtx.c
+++ b/drivers/common/idpf/idpf_common_rxtx.c
@@ -1178,7 +1178,6 @@ idpf_dp_singleq_recv_scatter_pkts(void *rx_queue, struct 
rte_mbuf **rx_pkts,
        struct rte_mbuf *last_seg = rxq->pkt_last_seg;
        struct rte_mbuf *rxm;
        struct rte_mbuf *nmb;
-       struct rte_eth_dev *dev;
        const uint32_t *ptype_tbl = rxq->adapter->ptype_tbl;
        uint16_t rx_id = rxq->rx_tail;
        uint16_t rx_packet_len;
@@ -1310,7 +1309,6 @@ idpf_xmit_cleanup(struct idpf_tx_queue *txq)
        uint16_t nb_tx_desc = txq->nb_tx_desc;
        uint16_t desc_to_clean_to;
        uint16_t nb_tx_to_clean;
-       uint16_t i;
 
        volatile struct idpf_base_tx_desc *txd = txq->tx_ring;
 
diff --git a/drivers/common/idpf/idpf_common_virtchnl.c 
b/drivers/common/idpf/idpf_common_virtchnl.c
index de511da788..0ae1d55d79 100644
--- a/drivers/common/idpf/idpf_common_virtchnl.c
+++ b/drivers/common/idpf/idpf_common_virtchnl.c
@@ -362,7 +362,7 @@ idpf_vc_queue_grps_add(struct idpf_vport *vport,
 {
        struct idpf_adapter *adapter = vport->adapter;
        struct idpf_cmd_info args;
-       int size, qg_info_size;
+       int size;
        int err = -1;
 
        size = sizeof(*p2p_queue_grps_info) +
@@ -1044,7 +1044,7 @@ int idpf_vc_rxq_config_by_info(struct idpf_vport *vport, 
struct virtchnl2_rxq_in
        struct idpf_adapter *adapter = vport->adapter;
        struct virtchnl2_config_rx_queues *vc_rxqs = NULL;
        struct idpf_cmd_info args;
-       int size, err, i;
+       int size, err;
 
        size = sizeof(*vc_rxqs) + (num_qs - 1) *
                sizeof(struct virtchnl2_rxq_info);
diff --git a/drivers/common/sfc_efx/base/efx_mae.c 
b/drivers/common/sfc_efx/base/efx_mae.c
index 9ae136dcce..1429e7dd0a 100644
--- a/drivers/common/sfc_efx/base/efx_mae.c
+++ b/drivers/common/sfc_efx/base/efx_mae.c
@@ -740,7 +740,6 @@ efx_mae_mport_by_pcie_function(
        __in                            uint32_t vf,
        __out                           efx_mport_sel_t *mportp)
 {
-       efx_dword_t dword;
        efx_rc_t rc;
 
        rc = efx_mae_mport_by_pcie_mh_function(EFX_PCIE_INTERFACE_CALLER,
@@ -4280,6 +4279,7 @@ efx_mae_action_set_replay(
        __out                   efx_mae_actions_t **spec_clonep)
 {
        const efx_nic_cfg_t *encp = efx_nic_cfg_get(enp);
+       (void)encp;
        efx_mae_actions_t *spec_clone;
        efx_rc_t rc;
 
diff --git a/drivers/common/sfc_efx/base/efx_table.c 
b/drivers/common/sfc_efx/base/efx_table.c
index 13a12a116e..50e9a37d1c 100644
--- a/drivers/common/sfc_efx/base/efx_table.c
+++ b/drivers/common/sfc_efx/base/efx_table.c
@@ -240,7 +240,6 @@ efx_table_describe(
        const efx_nic_cfg_t *encp = efx_nic_cfg_get(enp);
        unsigned int n_entries;
        efx_mcdi_req_t req;
-       unsigned int i;
        efx_rc_t rc;
        EFX_MCDI_DECLARE_BUF(payload,
            MC_CMD_TABLE_DESCRIPTOR_IN_LEN,
diff --git a/drivers/common/sfc_efx/base/meson.build 
b/drivers/common/sfc_efx/base/meson.build
index 7fc04aa57b..c8deb4555e 100644
--- a/drivers/common/sfc_efx/base/meson.build
+++ b/drivers/common/sfc_efx/base/meson.build
@@ -66,13 +66,19 @@ sources = [
         'rhead_virtio.c',
 ]
 
-extra_flags = [
-        '-Wno-sign-compare',
-        '-Wno-unused-parameter',
-        '-Wno-unused-variable',
-        '-Wno-empty-body',
-        '-Wno-unused-but-set-variable',
-]
+if is_ms_compiler
+    extra_flags = [
+            '/wd4101', # unreferenced local variable
+    ]
+else
+    extra_flags = [
+            '-Wno-sign-compare',
+            '-Wno-unused-parameter',
+            '-Wno-unused-variable',
+            '-Wno-empty-body',
+            '-Wno-unused-but-set-variable',
+    ]
+endif
 
 c_args = cflags
 foreach flag: extra_flags
-- 
2.47.2.vfs.0.1

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