[dpdk-dev] [PATCH 1/3] kni: fix compile error for Linux 4.7

[Ferruh Yigit]

Fix compile error becuase of Linux API change, 'trans_start' field
removed from 'struct net_device'.

Linux: 9b36627acecd ("net: remove dev->trans_start")

Signed-off-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
 lib/librte_eal/linuxapp/kni/compat.h  | 4 ++++
 lib/librte_eal/linuxapp/kni/kni_net.c | 9 ++++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eal/linuxapp/kni/compat.h 
b/lib/librte_eal/linuxapp/kni/compat.h
index cf100b6..0e939e4 100644
--- a/lib/librte_eal/linuxapp/kni/compat.h
+++ b/lib/librte_eal/linuxapp/kni/compat.h
@@ -27,3 +27,7 @@
 #if ( LINUX_VERSION_CODE < KERNEL_VERSION(4,1,0) )
 #define HAVE_KIOCB_MSG_PARAM
 #endif /* < 4.1.0 */
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
+#define HAVE_TRANS_START_HELPER
+#endif
diff --git a/lib/librte_eal/linuxapp/kni/kni_net.c 
b/lib/librte_eal/linuxapp/kni/kni_net.c
index 4095382..076372c 100644
--- a/lib/librte_eal/linuxapp/kni/kni_net.c
+++ b/lib/librte_eal/linuxapp/kni/kni_net.c
@@ -38,6 +38,8 @@

 #include <exec-env/rte_kni_common.h>
 #include <kni_fifo.h>
+
+#include "compat.h"
 #include "kni_dev.h"

 #define WD_TIMEOUT 5 /*jiffies */
@@ -426,7 +428,12 @@ kni_net_tx(struct sk_buff *skb, struct net_device *dev)
        struct rte_kni_mbuf *pkt_kva = NULL;
        struct rte_kni_mbuf *pkt_va = NULL;

-       dev->trans_start = jiffies; /* save the timestamp */
+       /* save the timestamp */
+#ifdef HAVE_TRANS_START_HELPER
+       netif_trans_update(dev);
+#else
+       dev->trans_start = jiffies;
+#endif

        /* Check if the length of skb is less than mbuf size */
        if (skb->len > kni->mbuf_size)
-- 
2.5.5