Update igb_uio.

dpdk/kernel/linux/igb_uio/compat.h

@@ -152,3 +152,17 @@ static inline bool igbuio_kernel_is_locked_down(void)
 	return false;
 #endif
 }
+
+#ifndef fallthrough
+
+#ifndef __has_attribute
+#define __has_attribute(x) 0
+#endif
+
+#if __has_attribute(__fallthrough__)
+#define fallthrough	__attribute__((__fallthrough__))
+#else
+#define fallthrough	do {} while (0)  /* fallthrough */
+#endif
+
+#endif

dpdk/kernel/linux/igb_uio/igb_uio.c

@@ -250,7 +250,7 @@ igbuio_pci_enable_interrupts(struct rte_uio_pci_dev *udev)
 		}
 #endif
 
-	/* falls through - to MSI */
+	fallthrough;
 	case RTE_INTR_MODE_MSI:
 #ifndef HAVE_ALLOC_IRQ_VECTORS
 		if (pci_enable_msi(udev->pdev) == 0) {
@@ -269,7 +269,7 @@ igbuio_pci_enable_interrupts(struct rte_uio_pci_dev *udev)
 			break;
 		}
 #endif
-	/* falls through - to INTX */
+	fallthrough;
 	case RTE_INTR_MODE_LEGACY:
 		if (pci_intx_mask_supported(udev->pdev)) {
 			dev_dbg(&udev->pdev->dev, "using INTX");
@@ -279,7 +279,7 @@ igbuio_pci_enable_interrupts(struct rte_uio_pci_dev *udev)
 			break;
 		}
 		dev_notice(&udev->pdev->dev, "PCI INTX mask not supported\n");
-	/* falls through - to no IRQ */
+	fallthrough;
 	case RTE_INTR_MODE_NONE:
 		udev->mode = RTE_INTR_MODE_NONE;
 		udev->info.irq = UIO_IRQ_NONE;

dpdk/kernel/linux/igb_uio/meson.build

@@ -8,7 +8,7 @@ mkfile = custom_target('igb_uio_makefile',
 custom_target('igb_uio',
         input: ['igb_uio.c', 'Kbuild'],
         output: 'igb_uio.ko',
-        command: ['make', '-C', kernel_dir + '/build',
+        command: ['make', '-C', kernel_build_dir + '/build',
                 'M=' + meson.current_build_dir(),
                 'src=' + meson.current_source_dir(),
                 'EXTRA_CFLAGS=-I' + meson.current_source_dir() +
@@ -16,5 +16,5 @@ custom_target('igb_uio',
                 'modules'],
         depends: mkfile,
         install: true,
-        install_dir: kernel_dir + '/extra/dpdk',
+        install_dir: kernel_build_dir + '/extra/dpdk',
         build_by_default: get_option('enable_kmods'))