ethdev: silence warning on pointer arithmetic

Statistics offsets in the rte_stats_strings[] array are always 64-bit aligned.
However, the compiler is unaware of this fact and complains on -Wcast-align.
This patch modifies the code to use RTE_PTR_ADD(), thereby silencing the
compiler by casting through (void *).

Signed-off-by: Cyril Chemparathy <cchemparathy@ezchip.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index e13fde5..02cd07f 100644 (file)
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -1742,8 +1742,7 @@ rte_eth_xstats_get(uint8_t port_id, struct rte_eth_xstats *xstats,
        struct rte_eth_stats eth_stats;
        struct rte_eth_dev *dev;
        unsigned count, i, q;
-       uint64_t val;
-       char *stats_ptr;
+       uint64_t val, *stats_ptr;
 
        if (!rte_eth_dev_is_valid_port(port_id)) {
                PMD_DEBUG_TRACE("Invalid port_id=%d\n", port_id);
@@ -1770,8 +1769,9 @@ rte_eth_xstats_get(uint8_t port_id, struct rte_eth_xstats *xstats,
 
        /* global stats */
        for (i = 0; i < RTE_NB_STATS; i++) {
-               stats_ptr = (char *)&eth_stats + rte_stats_strings[i].offset;
-               val = *(uint64_t *)stats_ptr;
+               stats_ptr = RTE_PTR_ADD(&eth_stats,
+                                       rte_stats_strings[i].offset);
+               val = *stats_ptr;
                snprintf(xstats[count].name, sizeof(xstats[count].name),
                        "%s", rte_stats_strings[i].name);
                xstats[count++].value = val;
@@ -1780,10 +1780,10 @@ rte_eth_xstats_get(uint8_t port_id, struct rte_eth_xstats *xstats,
        /* per-rxq stats */
        for (q = 0; q < dev->data->nb_rx_queues; q++) {
                for (i = 0; i < RTE_NB_RXQ_STATS; i++) {
-                       stats_ptr = (char *)&eth_stats;
-                       stats_ptr += rte_rxq_stats_strings[i].offset;
-                       stats_ptr += q * sizeof(uint64_t);
-                       val = *(uint64_t *)stats_ptr;
+                       stats_ptr = RTE_PTR_ADD(&eth_stats,
+                                       rte_rxq_stats_strings[i].offset +
+                                       q * sizeof(uint64_t));
+                       val = *stats_ptr;
                        snprintf(xstats[count].name, sizeof(xstats[count].name),
                                "rx_queue_%u_%s", q,
                                rte_rxq_stats_strings[i].name);
@@ -1794,10 +1794,10 @@ rte_eth_xstats_get(uint8_t port_id, struct rte_eth_xstats *xstats,
        /* per-txq stats */
        for (q = 0; q < dev->data->nb_tx_queues; q++) {
                for (i = 0; i < RTE_NB_TXQ_STATS; i++) {
-                       stats_ptr = (char *)&eth_stats;
-                       stats_ptr += rte_txq_stats_strings[i].offset;
-                       stats_ptr += q * sizeof(uint64_t);
-                       val = *(uint64_t *)stats_ptr;
+                       stats_ptr = RTE_PTR_ADD(&eth_stats,
+                                       rte_txq_stats_strings[i].offset +
+                                       q * sizeof(uint64_t));
+                       val = *stats_ptr;
                        snprintf(xstats[count].name, sizeof(xstats[count].name),
                                "tx_queue_%u_%s", q,
                                rte_txq_stats_strings[i].name);