diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 21aa4fc5f8efc64347d4518afec33d9dda000eb6..8c39913d17290c48fc9b60d260c49f58b9ab3d1e 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -327,17 +327,7 @@ config FORCE_CPEI_RETARGET
 	This option it useful to enable this feature on older BIOS's as well.
 	You can also enable this by using boot command line option force_cpei=1.
 
-config PREEMPT
-	bool "Preemptible Kernel"
-        help
-          This option reduces the latency of the kernel when reacting to
-          real-time or interactive events by allowing a low priority process to
-          be preempted even if it is in kernel mode executing a system call.
-          This allows applications to run more reliably even when the system is
-          under load.
-
-          Say Y here if you are building a kernel for a desktop, embedded
-          or real-time system.  Say N if you are unsure.
+source "kernel/Kconfig.preempt"
 
 source "mm/Kconfig"
 
diff --git a/arch/ia64/configs/bigsur_defconfig b/arch/ia64/configs/bigsur_defconfig
index 9eb48c0927b007baa1d14af8d139df35590ff2c7..6dd8655664f33fbfcae5843664fd71170dfe8137 100644
--- a/arch/ia64/configs/bigsur_defconfig
+++ b/arch/ia64/configs/bigsur_defconfig
@@ -42,7 +42,7 @@ CONFIG_CC_ALIGN_FUNCTIONS=0
 CONFIG_CC_ALIGN_LABELS=0
 CONFIG_CC_ALIGN_LOOPS=0
 CONFIG_CC_ALIGN_JUMPS=0
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 # CONFIG_TINY_SHMEM is not set
 CONFIG_BASE_SMALL=0
 # CONFIG_SLOB is not set
diff --git a/arch/ia64/configs/gensparse_defconfig b/arch/ia64/configs/gensparse_defconfig
index 3a9ed951db085a77940f7264ca7b2a74b5edab45..e86fbd39c79509df11bb9720355b7146c28ca903 100644
--- a/arch/ia64/configs/gensparse_defconfig
+++ b/arch/ia64/configs/gensparse_defconfig
@@ -43,7 +43,7 @@ CONFIG_CC_ALIGN_FUNCTIONS=0
 CONFIG_CC_ALIGN_LABELS=0
 CONFIG_CC_ALIGN_LOOPS=0
 CONFIG_CC_ALIGN_JUMPS=0
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 # CONFIG_TINY_SHMEM is not set
 CONFIG_BASE_SMALL=0
 # CONFIG_SLOB is not set
diff --git a/arch/ia64/configs/sim_defconfig b/arch/ia64/configs/sim_defconfig
index c420d9f3df98ddccf0e4580e4c93636c36952d0c..546a772f438e9e9e335d7a9d886019ce7f0be126 100644
--- a/arch/ia64/configs/sim_defconfig
+++ b/arch/ia64/configs/sim_defconfig
@@ -43,7 +43,7 @@ CONFIG_CC_ALIGN_FUNCTIONS=0
 CONFIG_CC_ALIGN_LABELS=0
 CONFIG_CC_ALIGN_LOOPS=0
 CONFIG_CC_ALIGN_JUMPS=0
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 # CONFIG_TINY_SHMEM is not set
 CONFIG_BASE_SMALL=0
 # CONFIG_SLOB is not set
diff --git a/arch/ia64/configs/sn2_defconfig b/arch/ia64/configs/sn2_defconfig
index 4c9ffc47bc7a3e53f87e00febd4af727109320b0..9aecfceeb38c6350c8ecae74b735f825ab8310f4 100644
--- a/arch/ia64/configs/sn2_defconfig
+++ b/arch/ia64/configs/sn2_defconfig
@@ -46,7 +46,7 @@ CONFIG_BASE_FULL=y
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 CONFIG_SHMEM=y
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 CONFIG_VM_EVENT_COUNTERS=y
 CONFIG_RT_MUTEXES=y
 # CONFIG_TINY_SHMEM is not set
diff --git a/arch/ia64/configs/tiger_defconfig b/arch/ia64/configs/tiger_defconfig
index 3dbb3987df277cf11a43e4062b86111046c2350c..797acf9066c1a0bd4de229d267a8f070b6e5a571 100644
--- a/arch/ia64/configs/tiger_defconfig
+++ b/arch/ia64/configs/tiger_defconfig
@@ -53,7 +53,7 @@ CONFIG_TIMERFD=y
 CONFIG_EVENTFD=y
 CONFIG_SHMEM=y
 CONFIG_VM_EVENT_COUNTERS=y
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 # CONFIG_SLUB is not set
 # CONFIG_SLOB is not set
 CONFIG_RT_MUTEXES=y
diff --git a/arch/ia64/configs/zx1_defconfig b/arch/ia64/configs/zx1_defconfig
index 4a060fc39934e5bb30166eeb4fde9e15934e07dd..0a06b1333c9578e34295d7b67ff38e9e5d4723bc 100644
--- a/arch/ia64/configs/zx1_defconfig
+++ b/arch/ia64/configs/zx1_defconfig
@@ -48,7 +48,7 @@ CONFIG_BASE_FULL=y
 CONFIG_FUTEX=y
 CONFIG_EPOLL=y
 CONFIG_SHMEM=y
-CONFIG_SLAB=y
+CONFIG_SLUB=y
 CONFIG_VM_EVENT_COUNTERS=y
 CONFIG_RT_MUTEXES=y
 # CONFIG_TINY_SHMEM is not set
diff --git a/arch/ia64/defconfig b/arch/ia64/defconfig
index 03172dc8c4031fb51e8e1a620617f330076d85e9..0210545e7f61f1b498e97fc828f879ca396dd554 100644
--- a/arch/ia64/defconfig
+++ b/arch/ia64/defconfig
@@ -53,8 +53,7 @@ CONFIG_TIMERFD=y
 CONFIG_EVENTFD=y
 CONFIG_SHMEM=y
 CONFIG_VM_EVENT_COUNTERS=y
-CONFIG_SLAB=y
-# CONFIG_SLUB is not set
+CONFIG_SLUB=y
 # CONFIG_SLOB is not set
 CONFIG_RT_MUTEXES=y
 # CONFIG_TINY_SHMEM is not set
diff --git a/arch/ia64/hp/sim/boot/boot_head.S b/arch/ia64/hp/sim/boot/boot_head.S
index a9bd71ac78e2dec37dc23695ae552953f283bd9d..8808565491fb51b6d8e5a949d580d08646da8095 100644
--- a/arch/ia64/hp/sim/boot/boot_head.S
+++ b/arch/ia64/hp/sim/boot/boot_head.S
@@ -26,6 +26,7 @@ GLOBAL_ENTRY(_start)
 	movl sp = stack_mem+16384-16
 	bsw.1
 	br.call.sptk.many rp=start_bootloader
+0:	nop 0		  /* dummy nop to make unwinding work */
 END(_start)
 
 /*
diff --git a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
index 15c08d52f09fb60038ff85db84a2ede007c0867f..8c6ec7070844d7a7826881ccf15b4ca5079d5654 100644
--- a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
+++ b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
@@ -113,10 +113,8 @@ processor_get_freq (
 
 	saved_mask = current->cpus_allowed;
 	set_cpus_allowed(current, cpumask_of_cpu(cpu));
-	if (smp_processor_id() != cpu) {
-		ret = -EAGAIN;
+	if (smp_processor_id() != cpu)
 		goto migrate_end;
-	}
 
 	/* processor_get_pstate gets the instantaneous frequency */
 	ret = processor_get_pstate(&value);
@@ -125,7 +123,7 @@ processor_get_freq (
 		set_cpus_allowed(current, saved_mask);
 		printk(KERN_WARNING "get performance failed with error %d\n",
 		       ret);
-		ret = -EAGAIN;
+		ret = 0;
 		goto migrate_end;
 	}
 	clock_freq = extract_clock(data, value, cpu);
diff --git a/arch/ia64/kernel/irq.c b/arch/ia64/kernel/irq.c
index cc3ee4ef37afb1bbfed332481f8b9e787b91ae38..44be1c952b7ca2cc6761f65c112a7f737c1f0b7f 100644
--- a/arch/ia64/kernel/irq.c
+++ b/arch/ia64/kernel/irq.c
@@ -33,6 +33,11 @@ void ack_bad_irq(unsigned int irq)
 }
 
 #ifdef CONFIG_IA64_GENERIC
+ia64_vector __ia64_irq_to_vector(int irq)
+{
+	return irq_cfg[irq].vector;
+}
+
 unsigned int __ia64_local_vector_to_irq (ia64_vector vec)
 {
 	return __get_cpu_var(vector_irq)[vec];
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index ff28620cb992c7eb846f6ab2628b095d2ad41fca..63b73f3d4c9f9a7a2d0cbb6866c5cc2dfa9d3c26 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -2018,22 +2018,26 @@ ia64_mca_late_init(void)
 
 		if (cpe_vector >= 0) {
 			/* If platform supports CPEI, enable the irq. */
-			cpe_poll_enabled = 0;
-			for (irq = 0; irq < NR_IRQS; ++irq)
-				if (irq_to_vector(irq) == cpe_vector) {
-					desc = irq_desc + irq;
-					desc->status |= IRQ_PER_CPU;
-					setup_irq(irq, &mca_cpe_irqaction);
-					ia64_cpe_irq = irq;
-				}
-			ia64_mca_register_cpev(cpe_vector);
-			IA64_MCA_DEBUG("%s: CPEI/P setup and enabled.\n", __FUNCTION__);
-		} else {
-			/* If platform doesn't support CPEI, get the timer going. */
-			if (cpe_poll_enabled) {
-				ia64_mca_cpe_poll(0UL);
-				IA64_MCA_DEBUG("%s: CPEP setup and enabled.\n", __FUNCTION__);
+			irq = local_vector_to_irq(cpe_vector);
+			if (irq > 0) {
+				cpe_poll_enabled = 0;
+				desc = irq_desc + irq;
+				desc->status |= IRQ_PER_CPU;
+				setup_irq(irq, &mca_cpe_irqaction);
+				ia64_cpe_irq = irq;
+				ia64_mca_register_cpev(cpe_vector);
+				IA64_MCA_DEBUG("%s: CPEI/P setup and enabled.\n",
+					__FUNCTION__);
+				return 0;
 			}
+			printk(KERN_ERR "%s: Failed to find irq for CPE "
+					"interrupt handler, vector %d\n",
+					__FUNCTION__, cpe_vector);
+		}
+		/* If platform doesn't support CPEI, get the timer going. */
+		if (cpe_poll_enabled) {
+			ia64_mca_cpe_poll(0UL);
+			IA64_MCA_DEBUG("%s: CPEP setup and enabled.\n", __FUNCTION__);
 		}
 	}
 #endif
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 4158906c45aacce3ad80bd8c203f9d34fdc2c23b..c613fc0e91cc8bc5d1cdc6f204d4c3e76037b589 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -198,9 +198,13 @@ default_idle (void)
 {
 	local_irq_enable();
 	while (!need_resched()) {
-		if (can_do_pal_halt)
-			safe_halt();
-		else
+		if (can_do_pal_halt) {
+			local_irq_disable();
+			if (!need_resched()) {
+				safe_halt();
+			}
+			local_irq_enable();
+		} else
 			cpu_relax();
 	}
 }
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 00f80324694829f5eef2e647299a8227213689f1..122444a97897d7f02a7707cdd3f178248a1efdf5 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -951,10 +951,14 @@ access_uarea (struct task_struct *child, unsigned long addr,
 			return 0;
 
 		      case PT_CR_IPSR:
-			if (write_access)
-				pt->cr_ipsr = ((*data & IPSR_MASK)
+			if (write_access) {
+				unsigned long tmp = *data;
+				/* psr.ri==3 is a reserved value: SDM 2:25 */
+				if ((tmp & IA64_PSR_RI) == IA64_PSR_RI)
+					tmp &= ~IA64_PSR_RI;
+				pt->cr_ipsr = ((tmp & IPSR_MASK)
 					       | (pt->cr_ipsr & ~IPSR_MASK));
-			else
+			} else
 				*data = (pt->cr_ipsr & IPSR_MASK);
 			return 0;
 
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index cd9a37a552c3099a2de603d923e9d23984b3c347..407efea04bf5d9b761daea91281b8dff2479b312 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -389,6 +389,13 @@ early_console_setup (char *cmdline)
 	if (!efi_setup_pcdp_console(cmdline))
 		earlycons++;
 #endif
+#ifdef CONFIG_HP_SIMSERIAL_CONSOLE
+	{
+		extern struct console hpsim_cons;
+		register_console(&hpsim_cons);
+		earlycons++;
+	}
+#endif
 
 	return (earlycons) ? 0 : -1;
 }
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index 83e80677de707c42776fe85bc7f38dce58219e0f..00232b4357ba20eeab9ef1dd82dddbaf489d0a57 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -20,6 +20,8 @@ PHDRS {
   code   PT_LOAD;
   percpu PT_LOAD;
   data   PT_LOAD;
+  note   PT_NOTE;
+  unwind 0x70000001; /* PT_IA_64_UNWIND, but ld doesn't match the name */
 }
 SECTIONS
 {
@@ -62,6 +64,9 @@ SECTIONS
 
   /* Read-only data */
 
+  NOTES :code :note		/* put .notes in text and mark in PT_NOTE  */
+  code_continues : {} :code	/* switch back to regular program...  */
+
   /* Exception table */
   . = ALIGN(16);
   __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET)
@@ -99,7 +104,8 @@ SECTIONS
 	  __start_unwind = .;
 	  *(.IA_64.unwind*)
 	  __end_unwind = .;
-	}
+	} :code :unwind
+  code_continues2 : {} : code
 
   RODATA
 
@@ -276,10 +282,6 @@ SECTIONS
   .debug_typenames 0 : { *(.debug_typenames) }
   .debug_varnames  0 : { *(.debug_varnames) }
   /* These must appear regardless of  .  */
-  /* Discard them for now since Intel SoftSDV cannot handle them.
-  .comment 0 : { *(.comment) }
-  .note 0 : { *(.note) }
-  */
   /DISCARD/ : { *(.comment) }
   /DISCARD/ : { *(.note) }
 }
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index 73ccb6010c055d18cf937f0e3f636530941e0eec..9150ffaff9e891da5ed52fbc05ed040d026afabc 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -112,11 +112,17 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
 	down_read(&mm->mmap_sem);
 
 	vma = find_vma_prev(mm, address, &prev_vma);
-	if (!vma)
+	if (!vma && !prev_vma )
 		goto bad_area;
 
-	/* find_vma_prev() returns vma such that address < vma->vm_end or NULL */
-	if (address < vma->vm_start)
+        /*
+         * find_vma_prev() returns vma such that address < vma->vm_end or NULL
+         *
+         * May find no vma, but could be that the last vm area is the
+         * register backing store that needs to expand upwards, in
+         * this case vma will be null, but prev_vma will ne non-null
+         */
+        if (( !vma && prev_vma ) || (address < vma->vm_start) )
 		goto check_expansion;
 
   good_area:
@@ -172,6 +178,8 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
 
   check_expansion:
 	if (!(prev_vma && (prev_vma->vm_flags & VM_GROWSUP) && (address == prev_vma->vm_end))) {
+		if (!vma)
+			goto bad_area;
 		if (!(vma->vm_flags & VM_GROWSDOWN))
 			goto bad_area;
 		if (REGION_NUMBER(address) != REGION_NUMBER(vma->vm_start)
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index 7f6d2360a2620f66f96487c4b37898f9a2dac13e..3600473894491baea82a5579398a5d29f52d802d 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -256,6 +256,13 @@ struct irq_chip irq_type_sn = {
 	.set_affinity	= sn_set_affinity_irq
 };
 
+ia64_vector sn_irq_to_vector(int irq)
+{
+	if (irq >= IA64_NUM_VECTORS)
+		return 0;
+	return (ia64_vector)irq;
+}
+
 unsigned int sn_local_vector_to_irq(u8 vector)
 {
 	return (CPU_VECTOR_TO_IRQ(smp_processor_id(), vector));
@@ -398,7 +405,10 @@ sn_call_force_intr_provider(struct sn_irq_info *sn_irq_info)
 	struct sn_pcibus_provider *pci_provider;
 
 	pci_provider = sn_pci_provider[sn_irq_info->irq_bridge_type];
-	if (pci_provider && pci_provider->force_interrupt)
+
+	/* Don't force an interrupt if the irq has been disabled */
+	if (!(irq_desc[sn_irq_info->irq_irq].status & IRQ_DISABLED) &&
+	    pci_provider && pci_provider->force_interrupt)
 		(*pci_provider->force_interrupt)(sn_irq_info);
 }
 
diff --git a/include/asm-ia64/atomic.h b/include/asm-ia64/atomic.h
index 1fc3b83325dab4fa0c20fb46abbc6d16228b34fa..50c2b83fd5a04cccf72996add92fae7b2ba0b407 100644
--- a/include/asm-ia64/atomic.h
+++ b/include/asm-ia64/atomic.h
@@ -55,7 +55,7 @@ ia64_atomic64_add (__s64 i, atomic64_t *v)
 
 	do {
 		CMPXCHG_BUGCHECK(v);
-		old = atomic_read(v);
+		old = atomic64_read(v);
 		new = old + i;
 	} while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old);
 	return new;
@@ -83,7 +83,7 @@ ia64_atomic64_sub (__s64 i, atomic64_t *v)
 
 	do {
 		CMPXCHG_BUGCHECK(v);
-		old = atomic_read(v);
+		old = atomic64_read(v);
 		new = old - i;
 	} while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old);
 	return new;
diff --git a/include/asm-ia64/hw_irq.h b/include/asm-ia64/hw_irq.h
index efa1b8f7251d9f12eeab86432eae8aac919b6646..bba5baa3c7fc97ca9fcfd9f63d26d118c8c24a98 100644
--- a/include/asm-ia64/hw_irq.h
+++ b/include/asm-ia64/hw_irq.h
@@ -124,6 +124,11 @@ static inline void ia64_resend_irq(unsigned int vector)
 extern irq_desc_t irq_desc[NR_IRQS];
 
 #ifndef CONFIG_IA64_GENERIC
+static inline ia64_vector __ia64_irq_to_vector(int irq)
+{
+	return irq_cfg[irq].vector;
+}
+
 static inline unsigned int
 __ia64_local_vector_to_irq (ia64_vector vec)
 {
@@ -145,7 +150,7 @@ __ia64_local_vector_to_irq (ia64_vector vec)
 static inline ia64_vector
 irq_to_vector (int irq)
 {
-	return irq_cfg[irq].vector;
+	return platform_irq_to_vector(irq);
 }
 
 /*
diff --git a/include/asm-ia64/machvec.h b/include/asm-ia64/machvec.h
index 5cf8bf1e805e6931ee51ea50f24c82fa336b7cda..c201a2020aa49e1a8a30deff30892b143e3dc157 100644
--- a/include/asm-ia64/machvec.h
+++ b/include/asm-ia64/machvec.h
@@ -30,6 +30,7 @@ typedef void ia64_mv_send_ipi_t (int, int, int, int);
 typedef void ia64_mv_timer_interrupt_t (int, void *);
 typedef void ia64_mv_global_tlb_purge_t (struct mm_struct *, unsigned long, unsigned long, unsigned long);
 typedef void ia64_mv_tlb_migrate_finish_t (struct mm_struct *);
+typedef u8 ia64_mv_irq_to_vector (int);
 typedef unsigned int ia64_mv_local_vector_to_irq (u8);
 typedef char *ia64_mv_pci_get_legacy_mem_t (struct pci_bus *);
 typedef int ia64_mv_pci_legacy_read_t (struct pci_bus *, u16 port, u32 *val,
@@ -145,6 +146,7 @@ extern void machvec_tlb_migrate_finish (struct mm_struct *);
 #  define platform_dma_sync_sg_for_device ia64_mv.dma_sync_sg_for_device
 #  define platform_dma_mapping_error		ia64_mv.dma_mapping_error
 #  define platform_dma_supported	ia64_mv.dma_supported
+#  define platform_irq_to_vector	ia64_mv.irq_to_vector
 #  define platform_local_vector_to_irq	ia64_mv.local_vector_to_irq
 #  define platform_pci_get_legacy_mem	ia64_mv.pci_get_legacy_mem
 #  define platform_pci_legacy_read	ia64_mv.pci_legacy_read
@@ -198,6 +200,7 @@ struct ia64_machine_vector {
 	ia64_mv_dma_sync_sg_for_device *dma_sync_sg_for_device;
 	ia64_mv_dma_mapping_error *dma_mapping_error;
 	ia64_mv_dma_supported *dma_supported;
+	ia64_mv_irq_to_vector *irq_to_vector;
 	ia64_mv_local_vector_to_irq *local_vector_to_irq;
 	ia64_mv_pci_get_legacy_mem_t *pci_get_legacy_mem;
 	ia64_mv_pci_legacy_read_t *pci_legacy_read;
@@ -247,6 +250,7 @@ struct ia64_machine_vector {
 	platform_dma_sync_sg_for_device,	\
 	platform_dma_mapping_error,			\
 	platform_dma_supported,			\
+	platform_irq_to_vector,			\
 	platform_local_vector_to_irq,		\
 	platform_pci_get_legacy_mem,		\
 	platform_pci_legacy_read,		\
@@ -366,6 +370,9 @@ extern ia64_mv_dma_supported		swiotlb_dma_supported;
 #ifndef platform_dma_supported
 # define  platform_dma_supported	swiotlb_dma_supported
 #endif
+#ifndef platform_irq_to_vector
+# define platform_irq_to_vector		__ia64_irq_to_vector
+#endif
 #ifndef platform_local_vector_to_irq
 # define platform_local_vector_to_irq	__ia64_local_vector_to_irq
 #endif
diff --git a/include/asm-ia64/machvec_init.h b/include/asm-ia64/machvec_init.h
index 2d36f6840f0bffb5d7719df6b01e66aad1606dc3..7f21249fba3fd2193b811c156484f1e2b95a1120 100644
--- a/include/asm-ia64/machvec_init.h
+++ b/include/asm-ia64/machvec_init.h
@@ -2,6 +2,7 @@
 
 extern ia64_mv_send_ipi_t ia64_send_ipi;
 extern ia64_mv_global_tlb_purge_t ia64_global_tlb_purge;
+extern ia64_mv_irq_to_vector __ia64_irq_to_vector;
 extern ia64_mv_local_vector_to_irq __ia64_local_vector_to_irq;
 extern ia64_mv_pci_get_legacy_mem_t ia64_pci_get_legacy_mem;
 extern ia64_mv_pci_legacy_read_t ia64_pci_legacy_read;
diff --git a/include/asm-ia64/machvec_sn2.h b/include/asm-ia64/machvec_sn2.h
index eaa2fce0fecde4e836def5815e13b619cb5db9ee..61439a7f5b08a76263983695d23ec7562bbea96e 100644
--- a/include/asm-ia64/machvec_sn2.h
+++ b/include/asm-ia64/machvec_sn2.h
@@ -35,6 +35,7 @@ extern ia64_mv_send_ipi_t sn2_send_IPI;
 extern ia64_mv_timer_interrupt_t sn_timer_interrupt;
 extern ia64_mv_global_tlb_purge_t sn2_global_tlb_purge;
 extern ia64_mv_tlb_migrate_finish_t	sn_tlb_migrate_finish;
+extern ia64_mv_irq_to_vector sn_irq_to_vector;
 extern ia64_mv_local_vector_to_irq sn_local_vector_to_irq;
 extern ia64_mv_pci_get_legacy_mem_t sn_pci_get_legacy_mem;
 extern ia64_mv_pci_legacy_read_t sn_pci_legacy_read;
@@ -104,6 +105,7 @@ extern ia64_mv_pci_fixup_bus_t		sn_pci_fixup_bus;
 #define platform_readw_relaxed		__sn_readw_relaxed
 #define platform_readl_relaxed		__sn_readl_relaxed
 #define platform_readq_relaxed		__sn_readq_relaxed
+#define platform_irq_to_vector		sn_irq_to_vector
 #define platform_local_vector_to_irq	sn_local_vector_to_irq
 #define platform_pci_get_legacy_mem	sn_pci_get_legacy_mem
 #define platform_pci_legacy_read	sn_pci_legacy_read
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 2ada8ee316b3b04e94ee25d3a9c1939384771c2b..4dc5fa8be781760aa307cff8d01488f270c47b9a 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -159,7 +159,8 @@ struct ap_device_id {
 
 #define AP_DEVICE_ID_MATCH_DEVICE_TYPE		0x01
 
-#define ACPI_ID_LEN	9
+#define ACPI_ID_LEN	16 /* only 9 bytes needed here, 16 bytes are used */
+			   /* to workaround crosscompile issues */
 
 struct acpi_device_id {
 	__u8 id[ACPI_ID_LEN];