13 files changed, 250 insertions, 57 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index dc6d8342e5e6..6b12d71978de 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -349,6 +349,13 @@ config NR_CPUS
         depends on SMP
         default "4"
 
+config HOTPLUG_CPU
+        bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
+        depends on SMP && HOTPLUG && EXPERIMENTAL
+        help
+          Say Y here to experiment with turning CPUs off and on.  CPUs
+          can be controlled through /sys/devices/system/cpu.
+
 config PREEMPT
         bool "Preemptible Kernel (EXPERIMENTAL)"
         depends on EXPERIMENTAL
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 3284118f356b..9def4404e1f2 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -1050,3 +1050,34 @@ static int __init noirqdebug_setup(char *str)
 }
 
 __setup("noirqdebug", noirqdebug_setup);
+
+#ifdef CONFIG_HOTPLUG_CPU
+/*
+ * The CPU has been marked offline.  Migrate IRQs off this CPU.  If
+ * the affinity settings do not allow other CPUs, force them onto any
+ * available CPU.
+ */
+void migrate_irqs(void)
+{
+        unsigned int i, cpu = smp_processor_id();
+
+        for (i = 0; i < NR_IRQS; i++) {
+                struct irqdesc *desc = irq_desc + i;
+
+                if (desc->cpu == cpu) {
+                        unsigned int newcpu = any_online_cpu(desc->affinity);
+
+                        if (newcpu == NR_CPUS) {
+                                if (printk_ratelimit())
+                                        printk(KERN_INFO "IRQ%u no longer affine to CPU%u\n",
+                                               i, cpu);
+
+                                cpus_setall(desc->affinity);
+                                newcpu = any_online_cpu(desc->affinity);
+                        }
+
+                        route_irq(desc, i, newcpu);
+                }
+        }
+}
+#endif /* CONFIG_HOTPLUG_CPU */
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 409db6d5ec99..ba298277becd 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -26,6 +26,7 @@
 #include <linux/interrupt.h>
 #include <linux/kallsyms.h>
 #include <linux/init.h>
+#include <linux/cpu.h>
 
 #include <asm/system.h>
 #include <asm/io.h>
@@ -105,6 +106,14 @@ void cpu_idle(void)
         /* endless idle loop with no priority at all */
         while (1) {
                 void (*idle)(void) = pm_idle;
+
+#ifdef CONFIG_HOTPLUG_CPU
+                if (cpu_is_offline(smp_processor_id())) {
+                        leds_event(led_idle_start);
+                        cpu_die();
+                }
+#endif
+
                 if (!idle)
                         idle = default_idle;
                 preempt_disable();
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 826164945747..edb5a406922f 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -80,19 +80,23 @@ static DEFINE_SPINLOCK(smp_call_function_lock);
 
 int __cpuinit __cpu_up(unsigned int cpu)
 {
-        struct task_struct *idle;
+        struct cpuinfo_arm *ci = &per_cpu(cpu_data, cpu);
+        struct task_struct *idle = ci->idle;
         pgd_t *pgd;
         pmd_t *pmd;
         int ret;
 
         /*
-         * Spawn a new process manually.  Grab a pointer to
-         * its task struct so we can mess with it
+         * Spawn a new process manually, if not already done.
+         * Grab a pointer to its task struct so we can mess with it
          */
-        idle = fork_idle(cpu);
-        if (IS_ERR(idle)) {
-                printk(KERN_ERR "CPU%u: fork() failed\n", cpu);
-                return PTR_ERR(idle);
+        if (!idle) {
+                idle = fork_idle(cpu);
+                if (IS_ERR(idle)) {
+                        printk(KERN_ERR "CPU%u: fork() failed\n", cpu);
+                        return PTR_ERR(idle);
+                }
+                ci->idle = idle;
         }
 
         /*
@@ -155,6 +159,91 @@ int __cpuinit __cpu_up(unsigned int cpu)
         return ret;
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
+/*
+ * __cpu_disable runs on the processor to be shutdown.
+ */
+int __cpuexit __cpu_disable(void)
+{
+        unsigned int cpu = smp_processor_id();
+        struct task_struct *p;
+        int ret;
+
+        ret = mach_cpu_disable(cpu);
+        if (ret)
+                return ret;
+
+        /*
+         * Take this CPU offline.  Once we clear this, we can't return,
+         * and we must not schedule until we're ready to give up the cpu.
+         */
+        cpu_clear(cpu, cpu_online_map);
+
+        /*
+         * OK - migrate IRQs away from this CPU
+         */
+        migrate_irqs();
+
+        /*
+         * Flush user cache and TLB mappings, and then remove this CPU
+         * from the vm mask set of all processes.
+         */
+        flush_cache_all();
+        local_flush_tlb_all();
+
+        read_lock(&tasklist_lock);
+        for_each_process(p) {
+                if (p->mm)
+                        cpu_clear(cpu, p->mm->cpu_vm_mask);
+        }
+        read_unlock(&tasklist_lock);
+
+        return 0;
+}
+
+/*
+ * called on the thread which is asking for a CPU to be shutdown -
+ * waits until shutdown has completed, or it is timed out.
+ */
+void __cpuexit __cpu_die(unsigned int cpu)
+{
+        if (!platform_cpu_kill(cpu))
+                printk("CPU%u: unable to kill\n", cpu);
+}
+
+/*
+ * Called from the idle thread for the CPU which has been shutdown.
+ *
+ * Note that we disable IRQs here, but do not re-enable them
+ * before returning to the caller. This is also the behaviour
+ * of the other hotplug-cpu capable cores, so presumably coming
+ * out of idle fixes this.
+ */
+void __cpuexit cpu_die(void)
+{
+        unsigned int cpu = smp_processor_id();
+
+        local_irq_disable();
+        idle_task_exit();
+
+        /*
+         * actual CPU shutdown procedure is at least platform (if not
+         * CPU) specific
+         */
+        platform_cpu_die(cpu);
+
+        /*
+         * Do not return to the idle loop - jump back to the secondary
+         * cpu initialisation.  There's some initialisation which needs
+         * to be repeated to undo the effects of taking the CPU offline.
+         */
+        __asm__("mov    sp, %0\n"
+        "       b       secondary_start_kernel"
+                :
+                : "r" ((void *)current->thread_info + THREAD_SIZE - 8));
+}
+#endif /* CONFIG_HOTPLUG_CPU */
+
 /*
  * This is the secondary CPU boot entry.  We're using this CPUs
  * idle thread stack, but a set of temporary page tables.
@@ -236,6 +325,8 @@ void __init smp_prepare_boot_cpu(void)
 {
         unsigned int cpu = smp_processor_id();
 
+        per_cpu(cpu_data, cpu).idle = current;
+
         cpu_set(cpu, cpu_possible_map);
         cpu_set(cpu, cpu_present_map);
         cpu_set(cpu, cpu_online_map);
@@ -309,8 +400,8 @@ int smp_call_function_on_cpu(void (*func)(void *info), void *info, int retry,
                 printk(KERN_CRIT
                        "CPU%u: smp_call_function timeout for %p(%p)\n"
                        "      callmap %lx pending %lx, %swait\n",
-                       smp_processor_id(), func, info, callmap, data.pending,
-                       wait ? "" : "no ");
+                       smp_processor_id(), func, info, *cpus_addr(callmap),
+                       *cpus_addr(data.pending), wait ? "" : "no ");
 
                 /*
                  * TRACE
diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c
index 01b264be5029..267bb07e39b7 100644
--- a/arch/arm/mach-realview/realview_eb.c
+++ b/arch/arm/mach-realview/realview_eb.c
@@ -43,14 +43,44 @@
 #include "clock.h"
 
 static struct map_desc realview_eb_io_desc[] __initdata = {
- { IO_ADDRESS(REALVIEW_SYS_BASE),       REALVIEW_SYS_BASE,      SZ_4K,  MT_DEVICE },
- { IO_ADDRESS(REALVIEW_GIC_CPU_BASE),   REALVIEW_GIC_CPU_BASE,  SZ_4K,  MT_DEVICE },
- { IO_ADDRESS(REALVIEW_GIC_DIST_BASE),  REALVIEW_GIC_DIST_BASE, SZ_4K,  MT_DEVICE },
- { IO_ADDRESS(REALVIEW_SCTL_BASE),      REALVIEW_SCTL_BASE,     SZ_4K,  MT_DEVICE },
- { IO_ADDRESS(REALVIEW_TIMER0_1_BASE),  REALVIEW_TIMER0_1_BASE, SZ_4K,  MT_DEVICE },
- { IO_ADDRESS(REALVIEW_TIMER2_3_BASE),  REALVIEW_TIMER2_3_BASE, SZ_4K,  MT_DEVICE },
+        {
+                .virtual        = IO_ADDRESS(REALVIEW_SYS_BASE),
+                .pfn            = __phys_to_pfn(REALVIEW_SYS_BASE),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        }, {
+                .virtual        = IO_ADDRESS(REALVIEW_GIC_CPU_BASE),
+                .pfn            = __phys_to_pfn(REALVIEW_GIC_CPU_BASE),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        }, {
+                .virtual        = IO_ADDRESS(REALVIEW_GIC_DIST_BASE),
+                .pfn            = __phys_to_pfn(REALVIEW_GIC_DIST_BASE),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        }, {
+                .virtual        = IO_ADDRESS(REALVIEW_SCTL_BASE),
+                .pfn            = __phys_to_pfn(REALVIEW_SCTL_BASE),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        }, {
+                .virtual        = IO_ADDRESS(REALVIEW_TIMER0_1_BASE),
+                .pfn            = __phys_to_pfn(REALVIEW_TIMER0_1_BASE),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        }, {
+                .virtual        = IO_ADDRESS(REALVIEW_TIMER2_3_BASE),
+                .pfn            = __phys_to_pfn(REALVIEW_TIMER2_3_BASE),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        },
 #ifdef CONFIG_DEBUG_LL
- { IO_ADDRESS(REALVIEW_UART0_BASE),     REALVIEW_UART0_BASE,    SZ_4K,  MT_DEVICE },
+        {
+                .virtual        = IO_ADDRESS(REALVIEW_UART0_BASE),
+                .pfn            = __phys_to_pfn(REALVIEW_UART0_BASE),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        }
 #endif
 };
 
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index fd079ff1fc53..c168f322ef8c 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -486,10 +486,17 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
 
         /*
          * Ask the machine support to map in the statically mapped devices.
-         * After this point, we can start to touch devices again.
          */
         if (mdesc->map_io)
                 mdesc->map_io();
+
+        /*
+         * Finally flush the tlb again - this ensures that we're in a
+         * consistent state wrt the writebuffer if the writebuffer needs
+         * draining.  After this point, we can start to touch devices
+         * again.
+         */
+        local_flush_tlb_all();
 }
 
 /*
diff --git a/drivers/video/amba-clcd.c b/drivers/video/amba-clcd.c
index cde6fd8eb390..4fc93dc2b4d3 100644
--- a/drivers/video/amba-clcd.c
+++ b/drivers/video/amba-clcd.c
@@ -505,14 +505,14 @@ static int clcdfb_remove(struct amba_device *dev)
 static struct amba_id clcdfb_id_table[] = {
         {
                 .id     = 0x00041110,
-                .mask   = 0x000fffff,
+                .mask   = 0x000ffffe,
         },
         { 0, 0 },
 };
 
 static struct amba_driver clcd_driver = {
         .drv            = {
-                .name   = "clcd-pl110",
+                .name   = "clcd-pl11x",
         },
         .probe          = clcdfb_probe,
         .remove         = clcdfb_remove,
diff --git a/include/asm-arm/arch-ixp4xx/io.h b/include/asm-arm/arch-ixp4xx/io.h
index 80d05ecad2f0..688f7f90d93e 100644
--- a/include/asm-arm/arch-ixp4xx/io.h
+++ b/include/asm-arm/arch-ixp4xx/io.h
@@ -80,9 +80,9 @@ __ixp4xx_iounmap(void __iomem *addr)
 #define __arch_ioremap(a, s, f, x)      __ixp4xx_ioremap(a, s, f, x)
 #define __arch_iounmap(a)               __ixp4xx_iounmap(a)
 
-#define writeb(p, v)                    __ixp4xx_writeb(p, v)
-#define writew(p, v)                    __ixp4xx_writew(p, v)
-#define writel(p, v)                    __ixp4xx_writel(p, v)
+#define writeb(v, p)                    __ixp4xx_writeb(v, p)
+#define writew(v, p)                    __ixp4xx_writew(v, p)
+#define writel(v, p)                    __ixp4xx_writel(v, p)
 
 #define writesb(p, v, l)                __ixp4xx_writesb(p, v, l)
 #define writesw(p, v, l)                __ixp4xx_writesw(p, v, l)
@@ -97,8 +97,9 @@ __ixp4xx_iounmap(void __iomem *addr)
 #define readsl(p, v, l)                 __ixp4xx_readsl(p, v, l)
 
 static inline void 
-__ixp4xx_writeb(u8 value, u32 addr)
+__ixp4xx_writeb(u8 value, volatile void __iomem *p)
 {
+        u32 addr = (u32)p;
         u32 n, byte_enables, data;
 
         if (addr >= VMALLOC_START) {
@@ -113,15 +114,16 @@ __ixp4xx_writeb(u8 value, u32 addr)
 }
 
 static inline void
-__ixp4xx_writesb(u32 bus_addr, const u8 *vaddr, int count)
+__ixp4xx_writesb(volatile void __iomem *bus_addr, const u8 *vaddr, int count)
 {
         while (count--)
                 writeb(*vaddr++, bus_addr);
 }
 
 static inline void 
-__ixp4xx_writew(u16 value, u32 addr)
+__ixp4xx_writew(u16 value, volatile void __iomem *p)
 {
+        u32 addr = (u32)p;
         u32 n, byte_enables, data;
 
         if (addr >= VMALLOC_START) {
@@ -136,15 +138,16 @@ __ixp4xx_writew(u16 value, u32 addr)
 }
 
 static inline void
-__ixp4xx_writesw(u32 bus_addr, const u16 *vaddr, int count)
+__ixp4xx_writesw(volatile void __iomem *bus_addr, const u16 *vaddr, int count)
 {
         while (count--)
                 writew(*vaddr++, bus_addr);
 }
 
 static inline void 
-__ixp4xx_writel(u32 value, u32 addr)
+__ixp4xx_writel(u32 value, volatile void __iomem *p)
 {
+        u32 addr = (u32)p;
         if (addr >= VMALLOC_START) {
                 __raw_writel(value, addr);
                 return;
@@ -154,15 +157,16 @@ __ixp4xx_writel(u32 value, u32 addr)
 }
 
 static inline void
-__ixp4xx_writesl(u32 bus_addr, const u32 *vaddr, int count)
+__ixp4xx_writesl(volatile void __iomem *bus_addr, const u32 *vaddr, int count)
 {
         while (count--)
                 writel(*vaddr++, bus_addr);
 }
 
 static inline unsigned char 
-__ixp4xx_readb(u32 addr)
+__ixp4xx_readb(const volatile void __iomem *p)
 {
+        u32 addr = (u32)p;
         u32 n, byte_enables, data;
 
         if (addr >= VMALLOC_START)
@@ -177,15 +181,16 @@ __ixp4xx_readb(u32 addr)
 }
 
 static inline void
-__ixp4xx_readsb(u32 bus_addr, u8 *vaddr, u32 count)
+__ixp4xx_readsb(const volatile void __iomem *bus_addr, u8 *vaddr, u32 count)
 {
         while (count--)
                 *vaddr++ = readb(bus_addr);
 }
 
 static inline unsigned short 
-__ixp4xx_readw(u32 addr)
+__ixp4xx_readw(const volatile void __iomem *p)
 {
+        u32 addr = (u32)p;
         u32 n, byte_enables, data;
 
         if (addr >= VMALLOC_START)
@@ -200,15 +205,16 @@ __ixp4xx_readw(u32 addr)
 }
 
 static inline void 
-__ixp4xx_readsw(u32 bus_addr, u16 *vaddr, u32 count)
+__ixp4xx_readsw(const volatile void __iomem *bus_addr, u16 *vaddr, u32 count)
 {
         while (count--)
                 *vaddr++ = readw(bus_addr);
 }
 
 static inline unsigned long 
-__ixp4xx_readl(u32 addr)
+__ixp4xx_readl(const volatile void __iomem *p)
 {
+        u32 addr = (u32)p;
         u32 data;
 
         if (addr >= VMALLOC_START)
@@ -221,7 +227,7 @@ __ixp4xx_readl(u32 addr)
 }
 
 static inline void 
-__ixp4xx_readsl(u32 bus_addr, u32 *vaddr, u32 count)
+__ixp4xx_readsl(const volatile void __iomem *bus_addr, u32 *vaddr, u32 count)
 {
         while (count--)
                 *vaddr++ = readl(bus_addr);
@@ -239,7 +245,7 @@ __ixp4xx_readsl(u32 bus_addr, u32 *vaddr, u32 count)
                                 eth_copy_and_sum((s),__mem_pci(c),(l),(b))
 
 static inline int
-check_signature(unsigned long bus_addr, const unsigned char *signature,
+check_signature(const unsigned char __iomem *bus_addr, const unsigned char *signature,
                 int length)
 {
         int retval = 0;
@@ -389,7 +395,7 @@ __ixp4xx_insl(u32 io_addr, u32 *vaddr, u32 count)
 #define __is_io_address(p)      (((unsigned long)p >= PIO_OFFSET) && \
                                         ((unsigned long)p <= (PIO_MASK + PIO_OFFSET)))
 static inline unsigned int
-__ixp4xx_ioread8(void __iomem *addr)
+__ixp4xx_ioread8(const void __iomem *addr)
 {
         unsigned long port = (unsigned long __force)addr;
         if (__is_io_address(port))
@@ -398,12 +404,12 @@ __ixp4xx_ioread8(void __iomem *addr)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 return (unsigned int)__raw_readb(port);
 #else
-                return (unsigned int)__ixp4xx_readb(port);
+                return (unsigned int)__ixp4xx_readb(addr);
 #endif
 }
 
 static inline void
-__ixp4xx_ioread8_rep(void __iomem *addr, void *vaddr, u32 count)
+__ixp4xx_ioread8_rep(const void __iomem *addr, void *vaddr, u32 count)
 {
         unsigned long port = (unsigned long __force)addr;
         if (__is_io_address(port))
@@ -412,12 +418,12 @@ __ixp4xx_ioread8_rep(void __iomem *addr, void *vaddr, u32 count)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 __raw_readsb(addr, vaddr, count);
 #else
-                __ixp4xx_readsb(port, vaddr, count);
+                __ixp4xx_readsb(addr, vaddr, count);
 #endif
 }
 
 static inline unsigned int
-__ixp4xx_ioread16(void __iomem *addr)
+__ixp4xx_ioread16(const void __iomem *addr)
 {
         unsigned long port = (unsigned long __force)addr;
         if (__is_io_address(port))
@@ -426,12 +432,12 @@ __ixp4xx_ioread16(void __iomem *addr)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 return le16_to_cpu(__raw_readw((u32)port));
 #else
-                return (unsigned int)__ixp4xx_readw((u32)port);
+                return (unsigned int)__ixp4xx_readw(addr);
 #endif
 }
 
 static inline void
-__ixp4xx_ioread16_rep(void __iomem *addr, void *vaddr, u32 count)
+__ixp4xx_ioread16_rep(const void __iomem *addr, void *vaddr, u32 count)
 {
         unsigned long port = (unsigned long __force)addr;
         if (__is_io_address(port))
@@ -440,12 +446,12 @@ __ixp4xx_ioread16_rep(void __iomem *addr, void *vaddr, u32 count)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 __raw_readsw(addr, vaddr, count);
 #else
-                __ixp4xx_readsw(port, vaddr, count);
+                __ixp4xx_readsw(addr, vaddr, count);
 #endif
 }
 
 static inline unsigned int
-__ixp4xx_ioread32(void __iomem *addr)
+__ixp4xx_ioread32(const void __iomem *addr)
 {
         unsigned long port = (unsigned long __force)addr;
         if (__is_io_address(port))
@@ -454,13 +460,13 @@ __ixp4xx_ioread32(void __iomem *addr)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 return le32_to_cpu(__raw_readl((u32)port));
 #else
-                return (unsigned int)__ixp4xx_readl((u32)port);
+                return (unsigned int)__ixp4xx_readl(addr);
 #endif
         }
 }
 
 static inline void
-__ixp4xx_ioread32_rep(void __iomem *addr, void *vaddr, u32 count)
+__ixp4xx_ioread32_rep(const void __iomem *addr, void *vaddr, u32 count)
 {
         unsigned long port = (unsigned long __force)addr;
         if (__is_io_address(port))
@@ -469,7 +475,7 @@ __ixp4xx_ioread32_rep(void __iomem *addr, void *vaddr, u32 count)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 __raw_readsl(addr, vaddr, count);
 #else
-                __ixp4xx_readsl(port, vaddr, count);
+                __ixp4xx_readsl(addr, vaddr, count);
 #endif
 }
 
@@ -483,7 +489,7 @@ __ixp4xx_iowrite8(u8 value, void __iomem *addr)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 __raw_writeb(value, port);
 #else
-                __ixp4xx_writeb(value, port);
+                __ixp4xx_writeb(value, addr);
 #endif
 }
 
@@ -497,7 +503,7 @@ __ixp4xx_iowrite8_rep(void __iomem *addr, const void *vaddr, u32 count)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 __raw_writesb(addr, vaddr, count);
 #else
-                __ixp4xx_writesb(port, vaddr, count);
+                __ixp4xx_writesb(addr, vaddr, count);
 #endif
 }
 
@@ -511,7 +517,7 @@ __ixp4xx_iowrite16(u16 value, void __iomem *addr)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 __raw_writew(cpu_to_le16(value), addr);
 #else
-                __ixp4xx_writew(value, port);
+                __ixp4xx_writew(value, addr);
 #endif
 }
 
@@ -525,7 +531,7 @@ __ixp4xx_iowrite16_rep(void __iomem *addr, const void *vaddr, u32 count)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 __raw_writesw(addr, vaddr, count);
 #else
-                __ixp4xx_writesw(port, vaddr, count);
+                __ixp4xx_writesw(addr, vaddr, count);
 #endif
 }
 
@@ -539,7 +545,7 @@ __ixp4xx_iowrite32(u32 value, void __iomem *addr)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 __raw_writel(cpu_to_le32(value), port);
 #else
-                __ixp4xx_writel(value, port);
+                __ixp4xx_writel(value, addr);
 #endif
 }
 
@@ -553,7 +559,7 @@ __ixp4xx_iowrite32_rep(void __iomem *addr, const void *vaddr, u32 count)
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
                 __raw_writesl(addr, vaddr, count);
 #else
-                __ixp4xx_writesl(port, vaddr, count);
+                __ixp4xx_writesl(addr, vaddr, count);
 #endif
 }
 
diff --git a/include/asm-arm/arch-realview/memory.h b/include/asm-arm/arch-realview/memory.h
index 99667d5cc617..ed370abb638f 100644
--- a/include/asm-arm/arch-realview/memory.h
+++ b/include/asm-arm/arch-realview/memory.h
@@ -23,7 +23,7 @@
 /*
  * Physical DRAM offset.
  */
-#define PHYS_OFFSET             (0x00000000UL)
+#define PHYS_OFFSET             UL(0x00000000)
 
 /*
  * Virtual view <-> DMA view memory address translations
diff --git a/include/asm-arm/cpu.h b/include/asm-arm/cpu.h
index fcbdd40cb667..751bc7462074 100644
--- a/include/asm-arm/cpu.h
+++ b/include/asm-arm/cpu.h
@@ -16,6 +16,7 @@
 struct cpuinfo_arm {
         struct cpu      cpu;
 #ifdef CONFIG_SMP
+        struct task_struct *idle;
         unsigned int    loops_per_jiffy;
 #endif
 };
diff --git a/include/asm-arm/irq.h b/include/asm-arm/irq.h
index f97912fbb10f..59975ee43cf1 100644
--- a/include/asm-arm/irq.h
+++ b/include/asm-arm/irq.h
@@ -47,5 +47,6 @@ struct irqaction;
 struct pt_regs;
 int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
 
+extern void migrate_irqs(void);
 #endif
 
diff --git a/include/asm-arm/smp.h b/include/asm-arm/smp.h
index dbb4d859c586..551cd3c3093c 100644
--- a/include/asm-arm/smp.h
+++ b/include/asm-arm/smp.h
@@ -66,4 +66,14 @@ struct secondary_data {
 };
 extern struct secondary_data secondary_data;
 
+extern int __cpu_disable(void);
+extern int mach_cpu_disable(unsigned int cpu);
+
+extern void __cpu_die(unsigned int cpu);
+extern void cpu_die(void);
+
+extern void platform_cpu_die(unsigned int cpu);
+extern int platform_cpu_kill(unsigned int cpu);
+extern void platform_cpu_enable(unsigned int cpu);
+
 #endif /* ifndef __ASM_ARM_SMP_H */
diff --git a/include/asm-arm/spinlock.h b/include/asm-arm/spinlock.h
index cb4906b45555..6ed4f916b166 100644
--- a/include/asm-arm/spinlock.h
+++ b/include/asm-arm/spinlock.h
@@ -80,7 +80,7 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lock)
  */
 #define rwlock_is_locked(x)     (*((volatile unsigned int *)(x)) != 0)
 
-static inline void __raw_write_lock(rwlock_t *rw)
+static inline void __raw_write_lock(raw_rwlock_t *rw)
 {
         unsigned long tmp;
 
@@ -97,7 +97,7 @@ static inline void __raw_write_lock(rwlock_t *rw)
         smp_mb();
 }
 
-static inline int __raw_write_trylock(rwlock_t *rw)
+static inline int __raw_write_trylock(raw_rwlock_t *rw)
 {
         unsigned long tmp;
 
@@ -157,7 +157,7 @@ static inline void __raw_read_lock(raw_rwlock_t *rw)
         smp_mb();
 }
 
-static inline void __raw_read_unlock(rwlock_t *rw)
+static inline void __raw_read_unlock(raw_rwlock_t *rw)
 {
         unsigned long tmp, tmp2;