6 files changed, 62 insertions, 94 deletions

diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index ede5f7741c42..25552508c3fd 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -374,16 +374,29 @@ EXPORT_SYMBOL(pcibios_fixup_bus);
 #endif
 
 /*
- * Swizzle the device pin each time we cross a bridge.
- * This might update pin and returns the slot number.
+ * Swizzle the device pin each time we cross a bridge.  If a platform does
+ * not provide a swizzle function, we perform the standard PCI swizzling.
+ *
+ * The default swizzling walks up the bus tree one level at a time, applying
+ * the standard swizzle function at each step, stopping when it finds the PCI
+ * root bus.  This will return the slot number of the bridge device on the
+ * root bus and the interrupt pin on that device which should correspond
+ * with the downstream device interrupt.
+ *
+ * Platforms may override this, in which case the slot and pin returned
+ * depend entirely on the platform code.  However, please note that the
+ * PCI standard swizzle is implemented on plug-in cards and Cardbus based
+ * PCI extenders, so it can not be ignored.
  */
 static u8 __devinit pcibios_swizzle(struct pci_dev *dev, u8 *pin)
 {
         struct pci_sys_data *sys = dev->sysdata;
-        int slot = 0, oldpin = *pin;
+        int slot, oldpin = *pin;
 
         if (sys->swizzle)
                 slot = sys->swizzle(dev, pin);
+        else
+                slot = pci_common_swizzle(dev, pin);
 
         if (debug_pci)
                 printk("PCI: %s swizzling pin %d => pin %d slot %d\n",
@@ -410,7 +423,7 @@ static int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
         return irq;
 }
 
-static void __init pcibios_init_hw(struct hw_pci *hw)
+static void __init pcibios_init_hw(struct hw_pci *hw, struct list_head *head)
 {
         struct pci_sys_data *sys = NULL;
         int ret;
@@ -424,7 +437,6 @@ static void __init pcibios_init_hw(struct hw_pci *hw)
 #ifdef CONFIG_PCI_DOMAINS
                 sys->domain  = hw->domain;
 #endif
-                sys->hw      = hw;
                 sys->busnr   = busnr;
                 sys->swizzle = hw->swizzle;
                 sys->map_irq = hw->map_irq;
@@ -440,14 +452,18 @@ static void __init pcibios_init_hw(struct hw_pci *hw)
                                          &iomem_resource, sys->mem_offset);
                         }
 
-                        sys->bus = hw->scan(nr, sys);
+                        if (hw->scan)
+                                sys->bus = hw->scan(nr, sys);
+                        else
+                                sys->bus = pci_scan_root_bus(NULL, sys->busnr,
+                                                hw->ops, sys, &sys->resources);
 
                         if (!sys->bus)
                                 panic("PCI: unable to scan bus!");
 
                         busnr = sys->bus->subordinate + 1;
 
-                        list_add(&sys->node, &hw->buses);
+                        list_add(&sys->node, head);
                 } else {
                         kfree(sys);
                         if (ret < 0)
@@ -459,19 +475,18 @@ static void __init pcibios_init_hw(struct hw_pci *hw)
 void __init pci_common_init(struct hw_pci *hw)
 {
         struct pci_sys_data *sys;
-
-        INIT_LIST_HEAD(&hw->buses);
+        LIST_HEAD(head);
 
         pci_add_flags(PCI_REASSIGN_ALL_RSRC);
         if (hw->preinit)
                 hw->preinit();
-        pcibios_init_hw(hw);
+        pcibios_init_hw(hw, &head);
         if (hw->postinit)
                 hw->postinit();
 
         pci_fixup_irqs(pcibios_swizzle, pcibios_map_irq);
 
-        list_for_each_entry(sys, &hw->buses, node) {
+        list_for_each_entry(sys, &head, node) {
                 struct pci_bus *bus = sys->bus;
 
                 if (!pci_has_flag(PCI_PROBE_ONLY)) {
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 71ccdbfed662..8349d4e97e2b 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -155,10 +155,10 @@ static bool migrate_one_irq(struct irq_desc *desc)
         }
 
         c = irq_data_get_irq_chip(d);
-        if (c->irq_set_affinity)
-                c->irq_set_affinity(d, affinity, true);
-        else
+        if (!c->irq_set_affinity)
                 pr_debug("IRQ%u: unable to set affinity\n", d->irq);
+        else if (c->irq_set_affinity(d, affinity, true) == IRQ_SET_MASK_OK && ret)
+                cpumask_copy(d->affinity, affinity);
 
         return ret;
 }
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 80abafb9bf33..9650c143afc1 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -906,27 +906,14 @@ long arch_ptrace(struct task_struct *child, long request,
         return ret;
 }
 
-#ifdef __ARMEB__
-#define AUDIT_ARCH_NR AUDIT_ARCH_ARMEB
-#else
-#define AUDIT_ARCH_NR AUDIT_ARCH_ARM
-#endif
-
 asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
 {
         unsigned long ip;
 
-        /*
-         * Save IP.  IP is used to denote syscall entry/exit:
-         *  IP = 0 -> entry, = 1 -> exit
-         */
-        ip = regs->ARM_ip;
-        regs->ARM_ip = why;
-
-        if (!ip)
+        if (why)
                 audit_syscall_exit(regs);
         else
-                audit_syscall_entry(AUDIT_ARCH_NR, scno, regs->ARM_r0,
+                audit_syscall_entry(AUDIT_ARCH_ARM, scno, regs->ARM_r0,
                                     regs->ARM_r1, regs->ARM_r2, regs->ARM_r3);
 
         if (!test_thread_flag(TIF_SYSCALL_TRACE))
@@ -936,6 +923,13 @@ asmlinkage int syscall_trace(int why, struct pt_regs *regs, int scno)
 
         current_thread_info()->syscall = scno;
 
+        /*
+         * IP is used to denote syscall entry/exit:
+         * IP = 0 -> entry, =1 -> exit
+         */
+        ip = regs->ARM_ip;
+        regs->ARM_ip = why;
+
         /* the 0x80 provides a way for the tracing parent to distinguish
            between a syscall stop and SIGTRAP delivery */
         ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 7cb532fc8aa4..d68d1b694680 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -180,44 +180,23 @@ static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame)
 
 static int preserve_vfp_context(struct vfp_sigframe __user *frame)
 {
-        struct thread_info *thread = current_thread_info();
-        struct vfp_hard_struct *h = &thread->vfpstate.hard;
         const unsigned long magic = VFP_MAGIC;
         const unsigned long size = VFP_STORAGE_SIZE;
         int err = 0;
 
-        vfp_sync_hwstate(thread);
         __put_user_error(magic, &frame->magic, err);
         __put_user_error(size, &frame->size, err);
 
-        /*
-         * Copy the floating point registers. There can be unused
-         * registers see asm/hwcap.h for details.
-         */
-        err |= __copy_to_user(&frame->ufp.fpregs, &h->fpregs,
-                              sizeof(h->fpregs));
-        /*
-         * Copy the status and control register.
-         */
-        __put_user_error(h->fpscr, &frame->ufp.fpscr, err);
-
-        /*
-         * Copy the exception registers.
-         */
-        __put_user_error(h->fpexc, &frame->ufp_exc.fpexc, err);
-        __put_user_error(h->fpinst, &frame->ufp_exc.fpinst, err);
-        __put_user_error(h->fpinst2, &frame->ufp_exc.fpinst2, err);
+        if (err)
+                return -EFAULT;
 
-        return err ? -EFAULT : 0;
+        return vfp_preserve_user_clear_hwstate(&frame->ufp, &frame->ufp_exc);
 }
 
 static int restore_vfp_context(struct vfp_sigframe __user *frame)
 {
-        struct thread_info *thread = current_thread_info();
-        struct vfp_hard_struct *h = &thread->vfpstate.hard;
         unsigned long magic;
         unsigned long size;
-        unsigned long fpexc;
         int err = 0;
 
         __get_user_error(magic, &frame->magic, err);
@@ -228,33 +207,7 @@ static int restore_vfp_context(struct vfp_sigframe __user *frame)
         if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE)
                 return -EINVAL;
 
-        vfp_flush_hwstate(thread);
-
-        /*
-         * Copy the floating point registers. There can be unused
-         * registers see asm/hwcap.h for details.
-         */
-        err |= __copy_from_user(&h->fpregs, &frame->ufp.fpregs,
-                                sizeof(h->fpregs));
-        /*
-         * Copy the status and control register.
-         */
-        __get_user_error(h->fpscr, &frame->ufp.fpscr, err);
-
-        /*
-         * Sanitise and restore the exception registers.
-         */
-        __get_user_error(fpexc, &frame->ufp_exc.fpexc, err);
-        /* Ensure the VFP is enabled. */
-        fpexc |= FPEXC_EN;
-        /* Ensure FPINST2 is invalid and the exception flag is cleared. */
-        fpexc &= ~(FPEXC_EX | FPEXC_FP2V);
-        h->fpexc = fpexc;
-
-        __get_user_error(h->fpinst, &frame->ufp_exc.fpinst, err);
-        __get_user_error(h->fpinst2, &frame->ufp_exc.fpinst2, err);
-
-        return err ? -EFAULT : 0;
+        return vfp_restore_user_hwstate(&frame->ufp, &frame->ufp_exc);
 }
 
 #endif
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 11c4148b8abb..cf58558ef4b9 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -251,8 +251,6 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
         struct mm_struct *mm = &init_mm;
         unsigned int cpu = smp_processor_id();
 
-        printk("CPU%u: Booted secondary processor\n", cpu);
-
         /*
          * All kernel threads share the same mm context; grab a
          * reference and switch to it.
@@ -264,6 +262,8 @@ asmlinkage void __cpuinit secondary_start_kernel(void)
         enter_lazy_tlb(mm, current);
         local_flush_tlb_all();
 
+        printk("CPU%u: Booted secondary processor\n", cpu);
+
         cpu_init();
         preempt_disable();
         trace_hardirqs_off();
@@ -513,10 +513,6 @@ static void ipi_cpu_stop(unsigned int cpu)
         local_fiq_disable();
         local_irq_disable();
 
-#ifdef CONFIG_HOTPLUG_CPU
-        platform_cpu_kill(cpu);
-#endif
-
         while (1)
                 cpu_relax();
 }
@@ -579,17 +575,25 @@ void smp_send_reschedule(int cpu)
         smp_cross_call(cpumask_of(cpu), IPI_RESCHEDULE);
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
+static void smp_kill_cpus(cpumask_t *mask)
+{
+        unsigned int cpu;
+        for_each_cpu(cpu, mask)
+                platform_cpu_kill(cpu);
+}
+#else
+static void smp_kill_cpus(cpumask_t *mask) { }
+#endif
+
 void smp_send_stop(void)
 {
         unsigned long timeout;
+        struct cpumask mask;
 
-        if (num_online_cpus() > 1) {
-                struct cpumask mask;
-                cpumask_copy(&mask, cpu_online_mask);
-                cpumask_clear_cpu(smp_processor_id(), &mask);
-
-                smp_cross_call(&mask, IPI_CPU_STOP);
-        }
+        cpumask_copy(&mask, cpu_online_mask);
+        cpumask_clear_cpu(smp_processor_id(), &mask);
+        smp_cross_call(&mask, IPI_CPU_STOP);
 
         /* Wait up to one second for other CPUs to stop */
         timeout = USEC_PER_SEC;
@@ -598,6 +602,8 @@ void smp_send_stop(void)
 
         if (num_online_cpus() > 1)
                 pr_warning("SMP: failed to stop secondary CPUs\n");
+
+        smp_kill_cpus(&mask);
 }
 
 /*
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index d2b177905cdb..76cbb055dd05 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -115,7 +115,7 @@ int kernel_execve(const char *filename,
                   "Ir" (THREAD_START_SP - sizeof(regs)),
                   "r" (&regs),
                   "Ir" (sizeof(regs))
-                : "r0", "r1", "r2", "r3", "ip", "lr", "memory");
+                : "r0", "r1", "r2", "r3", "r8", "r9", "ip", "lr", "memory");
 
  out:
         return ret;