Fix build with kernel 4.12

Corresponding upstream patches -
  * http://dpdk.org/dev/patchwork/patch/24076/
  * http://dpdk.org/dev/patchwork/patch/22003/

Tested on "4.12.4-custom".

dpdk/lib/librte_eal/linuxapp/igb_uio/igb_uio.c

@@ -380,7 +380,11 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 	case RTE_INTR_MODE_MSIX:
 		/* Only 1 msi-x vector needed */
 		msix_entry.entry = 0;
+#ifdef HAVE_PCI_ENABLE_MSIX
 		if (pci_enable_msix(dev, &msix_entry, 1) == 0) {
+#else
+		if (pci_enable_msix_range(dev, &msix_entry, 1, 1) == 0) {
+#endif
 			dev_dbg(&dev->dev, "using MSI-X");
 			udev->info.irq = msix_entry.vector;
 			udev->mode = RTE_INTR_MODE_MSIX;

dpdk/lib/librte_eal/linuxapp/kni/compat.h

@@ -2,6 +2,8 @@
  * Minimal wrappers to allow compiling kni on older kernels.
  */
 
+#include <linux/version.h>
+
 #ifndef RHEL_RELEASE_VERSION
 #define RHEL_RELEASE_VERSION(a, b) (((a) << 8) + (b))
 #endif
@@ -38,3 +40,7 @@
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
 #define HAVE_TRANS_START_HELPER
 #endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
+#define HAVE_SIGNAL_FUNCTIONS_OWN_HEADER
+#endif

dpdk/lib/librte_eal/linuxapp/kni/ethtool/igb/igb_main.c

@@ -1031,8 +1031,15 @@ static void igb_set_interrupt_capability(struct igb_adapter *adapter, bool msix)
 			for (i = 0; i < numvecs; i++)
 				adapter->msix_entries[i].entry = i;
 
+#ifdef HAVE_PCI_ENABLE_MSIX
 			err = pci_enable_msix(pdev,
 			                      adapter->msix_entries, numvecs);
+#else
+                       err = pci_enable_msix_range(pdev,
+                                       adapter->msix_entries,
+                                       numvecs,
+                                       numvecs);
+#endif
 			if (err == 0)
 				break;
 		}

dpdk/lib/librte_eal/linuxapp/kni/ethtool/igb/kcompat.h

@@ -3933,4 +3933,8 @@ skb_set_hash(struct sk_buff *skb, __u32 hash, __always_unused int type)
 #define HAVE_VF_VLAN_PROTO
 #endif /* >= 4.9.0 */
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
+#define HAVE_PCI_ENABLE_MSIX
+#endif
+
 #endif /* _KCOMPAT_H_ */

dpdk/lib/librte_eal/linuxapp/kni/kni_dev.h

@@ -25,9 +25,15 @@
 #ifndef _KNI_DEV_H_
 #define _KNI_DEV_H_
 
+#include "compat.h"
+
 #include <linux/if.h>
 #include <linux/wait.h>
+#ifdef HAVE_SIGNAL_FUNCTIONS_OWN_HEADER
+#include <linux/sched/signal.h>
+#else
 #include <linux/sched.h>
+#endif
 #include <linux/netdevice.h>
 #include <linux/spinlock.h>
 #include <linux/list.h>