v4.19.13 snapshot.
diff --git a/arch/ia64/kernel/machvec.c b/arch/ia64/kernel/machvec.c
new file mode 100644
index 0000000..7bfe988
--- /dev/null
+++ b/arch/ia64/kernel/machvec.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <asm/machvec.h>
+
+#ifdef CONFIG_IA64_GENERIC
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#include <asm/page.h>
+
+struct ia64_machine_vector ia64_mv;
+EXPORT_SYMBOL(ia64_mv);
+
+static struct ia64_machine_vector * __init
+lookup_machvec (const char *name)
+{
+ extern struct ia64_machine_vector machvec_start[];
+ extern struct ia64_machine_vector machvec_end[];
+ struct ia64_machine_vector *mv;
+
+ for (mv = machvec_start; mv < machvec_end; ++mv)
+ if (strcmp (mv->name, name) == 0)
+ return mv;
+
+ return 0;
+}
+
+void __init
+machvec_init (const char *name)
+{
+ struct ia64_machine_vector *mv;
+
+ if (!name)
+ name = acpi_get_sysname();
+ mv = lookup_machvec(name);
+ if (!mv)
+ panic("generic kernel failed to find machine vector for"
+ " platform %s!", name);
+
+ ia64_mv = *mv;
+ printk(KERN_INFO "booting generic kernel on platform %s\n", name);
+}
+
+void __init
+machvec_init_from_cmdline(const char *cmdline)
+{
+ char str[64];
+ const char *start;
+ char *end;
+
+ if (! (start = strstr(cmdline, "machvec=")) )
+ return machvec_init(NULL);
+
+ strlcpy(str, start + strlen("machvec="), sizeof(str));
+ if ( (end = strchr(str, ' ')) )
+ *end = '\0';
+
+ return machvec_init(str);
+}
+
+#endif /* CONFIG_IA64_GENERIC */
+
+void
+machvec_setup (char **arg)
+{
+}
+EXPORT_SYMBOL(machvec_setup);
+
+void
+machvec_timer_interrupt (int irq, void *dev_id)
+{
+}
+EXPORT_SYMBOL(machvec_timer_interrupt);
+
+void
+machvec_dma_sync_single(struct device *hwdev, dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction dir)
+{
+ mb();
+}
+EXPORT_SYMBOL(machvec_dma_sync_single);
+
+void
+machvec_dma_sync_sg(struct device *hwdev, struct scatterlist *sg, int n,
+ enum dma_data_direction dir)
+{
+ mb();
+}
+EXPORT_SYMBOL(machvec_dma_sync_sg);