6 files changed, 40 insertions, 18 deletions

diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index 1680e9e9c83..f776e72a4cb 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -372,6 +372,8 @@
 /* 360 */	CALL(sys_inotify_init1)
 		CALL(sys_preadv)
 		CALL(sys_pwritev)
+		CALL(sys_rt_tgsigqueueinfo)
+		CALL(sys_perf_counter_open)
 #ifndef syscalls_counted
 .equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
 #define syscalls_counted
diff --git a/arch/arm/kernel/init_task.c b/arch/arm/kernel/init_task.c
index e859af34946..3f470866bb8 100644
--- a/arch/arm/kernel/init_task.c
+++ b/arch/arm/kernel/init_task.c
@@ -14,10 +14,6 @@
 
 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
-struct mm_struct init_mm = INIT_MM(init_mm);
-
-EXPORT_SYMBOL(init_mm);
-
 /*
  * Initial thread structure.
  *
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 6874c7dca75..096f600dc8d 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -167,7 +167,7 @@ void __init init_IRQ(void)
 
 #ifdef CONFIG_SMP
 	cpumask_setall(bad_irq_desc.affinity);
-	bad_irq_desc.cpu = smp_processor_id();
+	bad_irq_desc.node = smp_processor_id();
 #endif
 	init_arch_irq();
 }
@@ -176,7 +176,7 @@ void __init init_IRQ(void)
 
 static void route_irq(struct irq_desc *desc, unsigned int irq, unsigned int cpu)
 {
-	pr_debug("IRQ%u: moving from cpu%u to cpu%u\n", irq, desc->cpu, cpu);
+	pr_debug("IRQ%u: moving from cpu%u to cpu%u\n", irq, desc->node, cpu);
 
 	spin_lock_irq(&desc->lock);
 	desc->chip->set_affinity(irq, cpumask_of(cpu));
@@ -195,7 +195,7 @@ void migrate_irqs(void)
 	for (i = 0; i < NR_IRQS; i++) {
 		struct irq_desc *desc = irq_desc + i;
 
-		if (desc->cpu == cpu) {
+		if (desc->node == cpu) {
 			unsigned int newcpu = cpumask_any_and(desc->affinity,
 							      cpu_online_mask);
 			if (newcpu >= nr_cpu_ids) {
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 1585423699e..56820cce91a 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -352,6 +352,23 @@ asm(	".section .text\n"
 "	.size	kernel_thread_helper, . - kernel_thread_helper\n"
 "	.previous");
 
+#ifdef CONFIG_ARM_UNWIND
+extern void kernel_thread_exit(long code);
+asm(	".section .text\n"
+"	.align\n"
+"	.type	kernel_thread_exit, #function\n"
+"kernel_thread_exit:\n"
+"	.fnstart\n"
+"	.cantunwind\n"
+"	bl	do_exit\n"
+"	nop\n"
+"	.fnend\n"
+"	.size	kernel_thread_exit, . - kernel_thread_exit\n"
+"	.previous");
+#else
+#define kernel_thread_exit	do_exit
+#endif
+
 /*
  * Create a kernel thread.
  */
@@ -363,7 +380,7 @@ pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
 
 	regs.ARM_r1 = (unsigned long)arg;
 	regs.ARM_r2 = (unsigned long)fn;
-	regs.ARM_r3 = (unsigned long)do_exit;
+	regs.ARM_r3 = (unsigned long)kernel_thread_exit;
 	regs.ARM_pc = (unsigned long)kernel_thread_helper;
 	regs.ARM_cpsr = SVC_MODE | PSR_ENDSTATE;
 
diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c
index 1dedc2c7ff4..dd56e11f339 100644
--- a/arch/arm/kernel/unwind.c
+++ b/arch/arm/kernel/unwind.c
@@ -212,7 +212,8 @@ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl)
 			ctrl->vrs[14] = *vsp++;
 		ctrl->vrs[SP] = (unsigned long)vsp;
 	} else if (insn == 0xb0) {
-		ctrl->vrs[PC] = ctrl->vrs[LR];
+		if (ctrl->vrs[PC] == 0)
+			ctrl->vrs[PC] = ctrl->vrs[LR];
 		/* no further processing */
 		ctrl->entries = 0;
 	} else if (insn == 0xb1) {
@@ -309,18 +310,20 @@ int unwind_frame(struct stackframe *frame)
 	}
 
 	while (ctrl.entries > 0) {
-		int urc;
-
-		if (ctrl.vrs[SP] < low || ctrl.vrs[SP] >= high)
-			return -URC_FAILURE;
-		urc = unwind_exec_insn(&ctrl);
+		int urc = unwind_exec_insn(&ctrl);
 		if (urc < 0)
 			return urc;
+		if (ctrl.vrs[SP] < low || ctrl.vrs[SP] >= high)
+			return -URC_FAILURE;
 	}
 
 	if (ctrl.vrs[PC] == 0)
 		ctrl.vrs[PC] = ctrl.vrs[LR];
 
+	/* check for infinite loop */
+	if (frame->pc == ctrl.vrs[PC])
+		return -URC_FAILURE;
+
 	frame->fp = ctrl.vrs[FP];
 	frame->sp = ctrl.vrs[SP];
 	frame->lr = ctrl.vrs[LR];
@@ -332,7 +335,6 @@ int unwind_frame(struct stackframe *frame)
 void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk)
 {
 	struct stackframe frame;
-	unsigned long high, low;
 	register unsigned long current_sp asm ("sp");
 
 	pr_debug("%s(regs = %p tsk = %p)\n", __func__, regs, tsk);
@@ -362,9 +364,6 @@ void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk)
 		frame.pc = thread_saved_pc(tsk);
 	}
 
-	low = frame.sp & ~(THREAD_SIZE - 1);
-	high = low + THREAD_SIZE;
-
 	while (1) {
 		int urc;
 		unsigned long where = frame.pc;
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 6c077979254..4340bf3d2c8 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -84,6 +84,14 @@ SECTIONS
 		*(.exitcall.exit)
 		*(.ARM.exidx.exit.text)
 		*(.ARM.extab.exit.text)
+#ifndef CONFIG_HOTPLUG_CPU
+		*(.ARM.exidx.cpuexit.text)
+		*(.ARM.extab.cpuexit.text)
+#endif
+#ifndef CONFIG_HOTPLUG
+		*(.ARM.exidx.devexit.text)
+		*(.ARM.extab.devexit.text)
+#endif
 #ifndef CONFIG_MMU
 		*(.fixup)
 		*(__ex_table)