Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  Cross-compilation between e.g. i386 -> 64bit could break -> work around it
  [IA64] Enable early console for Ski simulator
  [IA64] forbid ptrace changes psr.ri to 3
  [IA64] Failure to grow RBS
  [IA64] Fix processor_get_freq
  [IA64] SGI Altix : fix a force_interrupt bug on altix
  [IA64] Update arch/ia64/configs/* s/SLAB/SLUB/
  [IA64] get back PT_IA_64_UNWIND program header
  [IA64] need NOTES in vmlinux.lds.S
  [IA64] make unwinder stop at last frame of the bootloader
  [IA64] Clean up CPE handler registration
  [IA64] Include Kconfig.preempt
  [IA64] SN2 needs platform specific irq_to_vector() function.
  [IA64] Use atomic64_read to read an atomic64_t.
  [IA64] disable irq's and check need_resched before safe_halt

18 files changed, 85 insertions, 53 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 21aa4fc..8c39913 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 9eb48c0..6dd8655 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 3a9ed95..e86fbd3 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 c420d9f..546a772 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 4c9ffc4..9aecfce 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 3dbb398..797acf9 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 4a060fc..0a06b13 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 03172dc..0210545 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 a9bd71a..8808565 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 15c08d5..8c6ec70 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 cc3ee4e..44be1c95 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 ff28620..63b73f3 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 4158906..c613fc0 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 00f8032..122444a 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 cd9a37a..407efea 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 83e8067..00232b4 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 73ccb60..9150ffa 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 7f6d236..3600473 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);
 }