58 files changed, 347 insertions, 191 deletions

diff --git a/arch/alpha/kernel/Makefile b/arch/alpha/kernel/Makefile
index 9bb7b858ed23..7a6d908bb865 100644
--- a/arch/alpha/kernel/Makefile
+++ b/arch/alpha/kernel/Makefile
@@ -4,7 +4,7 @@
 
 extra-y         := head.o vmlinux.lds
 asflags-y       := $(KBUILD_CFLAGS)
-ccflags-y       := -Werror -Wno-sign-compare
+ccflags-y       := -Wno-sign-compare
 
 obj-y    := entry.o traps.o process.o init_task.o osf_sys.o irq.o \
             irq_alpha.o signal.o setup.o ptrace.o time.o \
diff --git a/arch/alpha/kernel/core_mcpcia.c b/arch/alpha/kernel/core_mcpcia.c
index 381fec0af52e..da7bcc372f16 100644
--- a/arch/alpha/kernel/core_mcpcia.c
+++ b/arch/alpha/kernel/core_mcpcia.c
@@ -88,7 +88,7 @@ conf_read(unsigned long addr, unsigned char type1,
 {
         unsigned long flags;
         unsigned long mid = MCPCIA_HOSE2MID(hose->index);
-        unsigned int stat0, value, temp, cpu;
+        unsigned int stat0, value, cpu;
 
         cpu = smp_processor_id();
 
@@ -101,7 +101,7 @@ conf_read(unsigned long addr, unsigned char type1,
         stat0 = *(vuip)MCPCIA_CAP_ERR(mid);
         *(vuip)MCPCIA_CAP_ERR(mid) = stat0;
         mb();
-        temp = *(vuip)MCPCIA_CAP_ERR(mid);
+        *(vuip)MCPCIA_CAP_ERR(mid);
         DBG_CFG(("conf_read: MCPCIA_CAP_ERR(%d) was 0x%x\n", mid, stat0));
 
         mb();
@@ -136,7 +136,7 @@ conf_write(unsigned long addr, unsigned int value, unsigned char type1,
 {
         unsigned long flags;
         unsigned long mid = MCPCIA_HOSE2MID(hose->index);
-        unsigned int stat0, temp, cpu;
+        unsigned int stat0, cpu;
 
         cpu = smp_processor_id();
 
@@ -145,7 +145,7 @@ conf_write(unsigned long addr, unsigned int value, unsigned char type1,
         /* Reset status register to avoid losing errors.  */
         stat0 = *(vuip)MCPCIA_CAP_ERR(mid);
         *(vuip)MCPCIA_CAP_ERR(mid) = stat0; mb();
-        temp = *(vuip)MCPCIA_CAP_ERR(mid);
+        *(vuip)MCPCIA_CAP_ERR(mid);
         DBG_CFG(("conf_write: MCPCIA CAP_ERR(%d) was 0x%x\n", mid, stat0));
 
         draina();
@@ -157,7 +157,7 @@ conf_write(unsigned long addr, unsigned int value, unsigned char type1,
         *((vuip)addr) = value;
         mb();
         mb();  /* magic */
-        temp = *(vuip)MCPCIA_CAP_ERR(mid); /* read to force the write */
+        *(vuip)MCPCIA_CAP_ERR(mid); /* read to force the write */
         mcheck_expected(cpu) = 0;
         mb();
 
@@ -572,12 +572,10 @@ mcpcia_print_system_area(unsigned long la_ptr)
 void
 mcpcia_machine_check(unsigned long vector, unsigned long la_ptr)
 {
-        struct el_common *mchk_header;
         struct el_MCPCIA_uncorrected_frame_mcheck *mchk_logout;
         unsigned int cpu = smp_processor_id();
         int expected;
 
-        mchk_header = (struct el_common *)la_ptr;
         mchk_logout = (struct el_MCPCIA_uncorrected_frame_mcheck *)la_ptr;
         expected = mcheck_expected(cpu);
 
diff --git a/arch/alpha/kernel/err_titan.c b/arch/alpha/kernel/err_titan.c
index c3b3781a03de..14b26c466c89 100644
--- a/arch/alpha/kernel/err_titan.c
+++ b/arch/alpha/kernel/err_titan.c
@@ -533,8 +533,6 @@ static struct el_subpacket_annotation el_titan_annotations[] = {
 static struct el_subpacket *
 el_process_regatta_subpacket(struct el_subpacket *header)
 {
-        int status;
-
         if (header->class != EL_CLASS__REGATTA_FAMILY) {
                 printk("%s  ** Unexpected header CLASS %d TYPE %d, aborting\n",
                        err_print_prefix,
@@ -551,7 +549,7 @@ el_process_regatta_subpacket(struct el_subpacket *header)
                 printk("%s  ** Occurred on CPU %d:\n", 
                        err_print_prefix,
                        (int)header->by_type.regatta_frame.cpuid);
-                status = privateer_process_logout_frame((struct el_common *)
+                privateer_process_logout_frame((struct el_common *)
                         header->by_type.regatta_frame.data_start, 1);
                 break;
         default:
diff --git a/arch/alpha/kernel/irq_alpha.c b/arch/alpha/kernel/irq_alpha.c
index 1479dc6ebd97..51b7fbd9e4c1 100644
--- a/arch/alpha/kernel/irq_alpha.c
+++ b/arch/alpha/kernel/irq_alpha.c
@@ -228,7 +228,7 @@ struct irqaction timer_irqaction = {
 void __init
 init_rtc_irq(void)
 {
-        irq_set_chip_and_handler_name(RTC_IRQ, &no_irq_chip,
+        irq_set_chip_and_handler_name(RTC_IRQ, &dummy_irq_chip,
                                       handle_simple_irq, "RTC");
         setup_irq(RTC_IRQ, &timer_irqaction);
 }
diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c
index d2634e4476b4..edbddcbd5bc6 100644
--- a/arch/alpha/kernel/setup.c
+++ b/arch/alpha/kernel/setup.c
@@ -1404,8 +1404,6 @@ determine_cpu_caches (unsigned int cpu_type)
         case PCA56_CPU:
         case PCA57_CPU:
           {
-                unsigned long cbox_config, size;
-
                 if (cpu_type == PCA56_CPU) {
                         L1I = CSHAPE(16*1024, 6, 1);
                         L1D = CSHAPE(8*1024, 5, 1);
@@ -1415,10 +1413,12 @@ determine_cpu_caches (unsigned int cpu_type)
                 }
                 L3 = -1;
 
+#if 0
+                unsigned long cbox_config, size;
+
                 cbox_config = *(vulp) phys_to_virt (0xfffff00008UL);
                 size = 512*1024 * (1 << ((cbox_config >> 12) & 3));
 
-#if 0
                 L2 = ((cbox_config >> 31) & 1 ? CSHAPE (size, 6, 1) : -1);
 #else
                 L2 = external_cache_probe(512*1024, 6);
diff --git a/arch/alpha/kernel/smc37c93x.c b/arch/alpha/kernel/smc37c93x.c
index 3e6a2893af9f..6886b834f487 100644
--- a/arch/alpha/kernel/smc37c93x.c
+++ b/arch/alpha/kernel/smc37c93x.c
@@ -79,7 +79,6 @@
 static unsigned long __init SMCConfigState(unsigned long baseAddr)
 {
         unsigned char devId;
-        unsigned char devRev;
 
         unsigned long configPort;
         unsigned long indexPort;
@@ -100,7 +99,7 @@ static unsigned long __init SMCConfigState(unsigned long baseAddr)
                 devId = inb(dataPort);
                 if (devId == VALID_DEVICE_ID) {
                         outb(DEVICE_REV, indexPort);
-                        devRev = inb(dataPort);
+                        /* unsigned char devRev = */ inb(dataPort);
                         break;
                 }
                 else
diff --git a/arch/alpha/kernel/sys_wildfire.c b/arch/alpha/kernel/sys_wildfire.c
index d3cb28bb8eb0..d92cdc715c65 100644
--- a/arch/alpha/kernel/sys_wildfire.c
+++ b/arch/alpha/kernel/sys_wildfire.c
@@ -156,7 +156,6 @@ static void __init
 wildfire_init_irq_per_pca(int qbbno, int pcano)
 {
         int i, irq_bias;
-        unsigned long io_bias;
         static struct irqaction isa_enable = {
                 .handler        = no_action,
                 .name           = "isa_enable",
@@ -165,10 +164,12 @@ wildfire_init_irq_per_pca(int qbbno, int pcano)
         irq_bias = qbbno * (WILDFIRE_PCA_PER_QBB * WILDFIRE_IRQ_PER_PCA)
                  + pcano * WILDFIRE_IRQ_PER_PCA;
 
+#if 0
+        unsigned long io_bias;
+
         /* Only need the following for first PCI bus per PCA. */
         io_bias = WILDFIRE_IO(qbbno, pcano<<1) - WILDFIRE_IO_BIAS;
 
-#if 0
         outb(0, DMA1_RESET_REG + io_bias);
         outb(0, DMA2_RESET_REG + io_bias);
         outb(DMA_MODE_CASCADE, DMA2_MODE_REG + io_bias);
diff --git a/arch/alpha/kernel/time.c b/arch/alpha/kernel/time.c
index a58e84f1a63b..918e8e0b72ff 100644
--- a/arch/alpha/kernel/time.c
+++ b/arch/alpha/kernel/time.c
@@ -153,6 +153,7 @@ void read_persistent_clock(struct timespec *ts)
                 year += 100;
 
         ts->tv_sec = mktime(year, mon, day, hour, min, sec);
+        ts->tv_nsec = 0;
 }
 
 
diff --git a/arch/arm/mach-msm/board-qsd8x50.c b/arch/arm/mach-msm/board-qsd8x50.c
index 7f568611547e..6a96911b0ad5 100644
--- a/arch/arm/mach-msm/board-qsd8x50.c
+++ b/arch/arm/mach-msm/board-qsd8x50.c
@@ -160,10 +160,7 @@ static struct msm_mmc_platform_data qsd8x50_sdc1_data = {
 
 static void __init qsd8x50_init_mmc(void)
 {
-        if (machine_is_qsd8x50_ffa() || machine_is_qsd8x50a_ffa())
-                vreg_mmc = vreg_get(NULL, "gp6");
-        else
-                vreg_mmc = vreg_get(NULL, "gp5");
+        vreg_mmc = vreg_get(NULL, "gp5");
 
         if (IS_ERR(vreg_mmc)) {
                 pr_err("vreg get for vreg_mmc failed (%ld)\n",
diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c
index 56f920c55b6a..38b95e949d13 100644
--- a/arch/arm/mach-msm/timer.c
+++ b/arch/arm/mach-msm/timer.c
@@ -269,7 +269,7 @@ int __cpuinit local_timer_setup(struct clock_event_device *evt)
 
         /* Use existing clock_event for cpu 0 */
         if (!smp_processor_id())
-                return;
+                return 0;
 
         writel(DGT_CLK_CTL_DIV_4, MSM_TMR_BASE + DGT_CLK_CTL);
 
diff --git a/arch/arm/mach-tegra/gpio.c b/arch/arm/mach-tegra/gpio.c
index 76a3f654220f..65a1aba6823d 100644
--- a/arch/arm/mach-tegra/gpio.c
+++ b/arch/arm/mach-tegra/gpio.c
@@ -257,7 +257,8 @@ static void tegra_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
 void tegra_gpio_resume(void)
 {
         unsigned long flags;
-        int b, p, i;
+        int b;
+        int p;
 
         local_irq_save(flags);
 
@@ -280,7 +281,8 @@ void tegra_gpio_resume(void)
 void tegra_gpio_suspend(void)
 {
         unsigned long flags;
-        int b, p, i;
+        int b;
+        int p;
 
         local_irq_save(flags);
         for (b = 0; b < ARRAY_SIZE(tegra_gpio_banks); b++) {
diff --git a/arch/arm/mach-tegra/tegra2_clocks.c b/arch/arm/mach-tegra/tegra2_clocks.c
index 6d7c4eea4dcb..4459470c052d 100644
--- a/arch/arm/mach-tegra/tegra2_clocks.c
+++ b/arch/arm/mach-tegra/tegra2_clocks.c
@@ -1362,14 +1362,15 @@ static int tegra_clk_shared_bus_set_rate(struct clk *c, unsigned long rate)
 {
         unsigned long flags;
         int ret;
+        long new_rate = rate;
 
-        rate = clk_round_rate(c->parent, rate);
-        if (rate < 0)
-                return rate;
+        new_rate = clk_round_rate(c->parent, new_rate);
+        if (new_rate < 0)
+                return new_rate;
 
         spin_lock_irqsave(&c->parent->spinlock, flags);
 
-        c->u.shared_bus_user.rate = rate;
+        c->u.shared_bus_user.rate = new_rate;
         ret = tegra_clk_shared_bus_update(c->parent);
 
         spin_unlock_irqrestore(&c->parent->spinlock, flags);
diff --git a/arch/arm/plat-s5p/pm.c b/arch/arm/plat-s5p/pm.c
index d592b6304b48..d15dc47b0e3d 100644
--- a/arch/arm/plat-s5p/pm.c
+++ b/arch/arm/plat-s5p/pm.c
@@ -19,17 +19,6 @@
 
 #define PFX "s5p pm: "
 
-/* s3c_pm_check_resume_pin
- *
- * check to see if the pin is configured correctly for sleep mode, and
- * make any necessary adjustments if it is not
-*/
-
-static void s3c_pm_check_resume_pin(unsigned int pin, unsigned int irqoffs)
-{
-        /* nothing here yet */
-}
-
 /* s3c_pm_configure_extint
  *
  * configure all external interrupt pins
diff --git a/arch/arm/plat-samsung/pm-check.c b/arch/arm/plat-samsung/pm-check.c
index e4baf76f374a..6b733fafe7cd 100644
--- a/arch/arm/plat-samsung/pm-check.c
+++ b/arch/arm/plat-samsung/pm-check.c
@@ -164,7 +164,6 @@ static inline int in_region(void *ptr, int size, void *what, size_t whatsz)
  */
 static u32 *s3c_pm_runcheck(struct resource *res, u32 *val)
 {
-        void *save_at = phys_to_virt(s3c_sleep_save_phys);
         unsigned long addr;
         unsigned long left;
         void *stkpage;
@@ -192,11 +191,6 @@ static u32 *s3c_pm_runcheck(struct resource *res, u32 *val)
                         goto skip_check;
                 }
 
-                if (in_region(ptr, left, save_at, 32*4 )) {
-                        S3C_PMDBG("skipping %08lx, has save block in\n", addr);
-                        goto skip_check;
-                }
-
                 /* calculate and check the checksum */
 
                 calc = crc32_le(~0, ptr, left);
diff --git a/arch/arm/plat-samsung/pm.c b/arch/arm/plat-samsung/pm.c
index d5b58d31903c..5c0a440d6e16 100644
--- a/arch/arm/plat-samsung/pm.c
+++ b/arch/arm/plat-samsung/pm.c
@@ -214,8 +214,9 @@ void s3c_pm_do_restore_core(struct sleep_save *ptr, int count)
  *
  * print any IRQs asserted at resume time (ie, we woke from)
 */
-static void s3c_pm_show_resume_irqs(int start, unsigned long which,
-                                    unsigned long mask)
+static void __maybe_unused s3c_pm_show_resume_irqs(int start,
+                                                   unsigned long which,
+                                                   unsigned long mask)
 {
         int i;
 
diff --git a/arch/avr32/include/asm/setup.h b/arch/avr32/include/asm/setup.h
index ff5b7cf6be4d..160543dbec7e 100644
--- a/arch/avr32/include/asm/setup.h
+++ b/arch/avr32/include/asm/setup.h
@@ -94,6 +94,13 @@ struct tag_ethernet {
 
 #define ETH_INVALID_PHY 0xff
 
+/* board information */
+#define ATAG_BOARDINFO  0x54410008
+
+struct tag_boardinfo {
+        u32     board_number;
+};
+
 struct tag {
         struct tag_header hdr;
         union {
@@ -102,6 +109,7 @@ struct tag {
                 struct tag_cmdline cmdline;
                 struct tag_clock clock;
                 struct tag_ethernet ethernet;
+                struct tag_boardinfo boardinfo;
         } u;
 };
 
@@ -128,6 +136,7 @@ extern struct tag *bootloader_tags;
 
 extern resource_size_t fbmem_start;
 extern resource_size_t fbmem_size;
+extern u32 board_number;
 
 void setup_processor(void);
 
diff --git a/arch/avr32/kernel/setup.c b/arch/avr32/kernel/setup.c
index 5c7083916c33..bb0974cce4ac 100644
--- a/arch/avr32/kernel/setup.c
+++ b/arch/avr32/kernel/setup.c
@@ -391,6 +391,21 @@ static int __init parse_tag_clock(struct tag *tag)
 __tagtable(ATAG_CLOCK, parse_tag_clock);
 
 /*
+ * The board_number correspond to the bd->bi_board_number in U-Boot. This
+ * parameter is only available during initialisation and can be used in some
+ * kind of board identification.
+ */
+u32 __initdata board_number;
+
+static int __init parse_tag_boardinfo(struct tag *tag)
+{
+        board_number = tag->u.boardinfo.board_number;
+
+        return 0;
+}
+__tagtable(ATAG_BOARDINFO, parse_tag_boardinfo);
+
+/*
  * Scan the tag table for this tag, and call its parse function. The
  * tag table is built by the linker from all the __tagtable
  * declarations.
diff --git a/arch/avr32/kernel/traps.c b/arch/avr32/kernel/traps.c
index b91b2044af9c..7aa25756412f 100644
--- a/arch/avr32/kernel/traps.c
+++ b/arch/avr32/kernel/traps.c
@@ -95,28 +95,6 @@ void _exception(long signr, struct pt_regs *regs, int code,
         info.si_code = code;
         info.si_addr = (void __user *)addr;
         force_sig_info(signr, &info, current);
-
-        /*
-         * Init gets no signals that it doesn't have a handler for.
-         * That's all very well, but if it has caused a synchronous
-         * exception and we ignore the resulting signal, it will just
-         * generate the same exception over and over again and we get
-         * nowhere.  Better to kill it and let the kernel panic.
-         */
-        if (is_global_init(current)) {
-                __sighandler_t handler;
-
-                spin_lock_irq(&current->sighand->siglock);
-                handler = current->sighand->action[signr-1].sa.sa_handler;
-                spin_unlock_irq(&current->sighand->siglock);
-                if (handler == SIG_DFL) {
-                        /* init has generated a synchronous exception
-                           and it doesn't have a handler for the signal */
-                        printk(KERN_CRIT "init has generated signal %ld "
-                               "but has no handler for it\n", signr);
-                        do_exit(signr);
-                }
-        }
 }
 
 asmlinkage void do_nmi(unsigned long ecr, struct pt_regs *regs)
diff --git a/arch/avr32/mach-at32ap/clock.c b/arch/avr32/mach-at32ap/clock.c
index 442f08c5e641..86925fd6ea5b 100644
--- a/arch/avr32/mach-at32ap/clock.c
+++ b/arch/avr32/mach-at32ap/clock.c
@@ -35,22 +35,30 @@ void at32_clk_register(struct clk *clk)
         spin_unlock(&clk_list_lock);
 }
 
-struct clk *clk_get(struct device *dev, const char *id)
+static struct clk *__clk_get(struct device *dev, const char *id)
 {
         struct clk *clk;
 
-        spin_lock(&clk_list_lock);
-
         list_for_each_entry(clk, &at32_clock_list, list) {
                 if (clk->dev == dev && strcmp(id, clk->name) == 0) {
-                        spin_unlock(&clk_list_lock);
                         return clk;
                 }
         }
 
-        spin_unlock(&clk_list_lock);
         return ERR_PTR(-ENOENT);
 }
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+        struct clk *clk;
+
+        spin_lock(&clk_list_lock);
+        clk = __clk_get(dev, id);
+        spin_unlock(&clk_list_lock);
+
+        return clk;
+}
+
 EXPORT_SYMBOL(clk_get);
 
 void clk_put(struct clk *clk)
@@ -257,15 +265,15 @@ static int clk_show(struct seq_file *s, void *unused)
         spin_lock(&clk_list_lock);
 
         /* show clock tree as derived from the three oscillators */
-        clk = clk_get(NULL, "osc32k");
+        clk = __clk_get(NULL, "osc32k");
         dump_clock(clk, &r);
         clk_put(clk);
 
-        clk = clk_get(NULL, "osc0");
+        clk = __clk_get(NULL, "osc0");
         dump_clock(clk, &r);
         clk_put(clk);
 
-        clk = clk_get(NULL, "osc1");
+        clk = __clk_get(NULL, "osc1");
         dump_clock(clk, &r);
         clk_put(clk);
 
diff --git a/arch/avr32/mach-at32ap/extint.c b/arch/avr32/mach-at32ap/extint.c
index 47ba4b9b6db1..fbc2aeaebddb 100644
--- a/arch/avr32/mach-at32ap/extint.c
+++ b/arch/avr32/mach-at32ap/extint.c
@@ -61,34 +61,34 @@ struct eic {
 static struct eic *nmi_eic;
 static bool nmi_enabled;
 
-static void eic_ack_irq(struct irq_chip *d)
+static void eic_ack_irq(struct irq_data *d)
 {
-        struct eic *eic = irq_data_get_irq_chip_data(data);
+        struct eic *eic = irq_data_get_irq_chip_data(d);
         eic_writel(eic, ICR, 1 << (d->irq - eic->first_irq));
 }
 
-static void eic_mask_irq(struct irq_chip *d)
+static void eic_mask_irq(struct irq_data *d)
 {
-        struct eic *eic = irq_data_get_irq_chip_data(data);
+        struct eic *eic = irq_data_get_irq_chip_data(d);
         eic_writel(eic, IDR, 1 << (d->irq - eic->first_irq));
 }
 
-static void eic_mask_ack_irq(struct irq_chip *d)
+static void eic_mask_ack_irq(struct irq_data *d)
 {
-        struct eic *eic = irq_data_get_irq_chip_data(data);
+        struct eic *eic = irq_data_get_irq_chip_data(d);
         eic_writel(eic, ICR, 1 << (d->irq - eic->first_irq));
         eic_writel(eic, IDR, 1 << (d->irq - eic->first_irq));
 }
 
-static void eic_unmask_irq(struct irq_chip *d)
+static void eic_unmask_irq(struct irq_data *d)
 {
-        struct eic *eic = irq_data_get_irq_chip_data(data);
+        struct eic *eic = irq_data_get_irq_chip_data(d);
         eic_writel(eic, IER, 1 << (d->irq - eic->first_irq));
 }
 
-static int eic_set_irq_type(struct irq_chip *d, unsigned int flow_type)
+static int eic_set_irq_type(struct irq_data *d, unsigned int flow_type)
 {
-        struct eic *eic = irq_data_get_irq_chip_data(data);
+        struct eic *eic = irq_data_get_irq_chip_data(d);
         unsigned int irq = d->irq;
         unsigned int i = irq - eic->first_irq;
         u32 mode, edge, level;
@@ -191,7 +191,7 @@ static int __init eic_probe(struct platform_device *pdev)
 
         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         int_irq = platform_get_irq(pdev, 0);
-        if (!regs || !int_irq) {
+        if (!regs || (int)int_irq <= 0) {
                 dev_dbg(&pdev->dev, "missing regs and/or irq resource\n");
                 return -ENXIO;
         }
diff --git a/arch/avr32/mach-at32ap/pio.c b/arch/avr32/mach-at32ap/pio.c
index f308e1ddc629..2e0aa853a4bc 100644
--- a/arch/avr32/mach-at32ap/pio.c
+++ b/arch/avr32/mach-at32ap/pio.c
@@ -257,7 +257,7 @@ static void gpio_irq_mask(struct irq_data *d)
         pio_writel(pio, IDR, 1 << (gpio & 0x1f));
 }
 
-static void gpio_irq_unmask(struct irq_data *d))
+static void gpio_irq_unmask(struct irq_data *d)
 {
         unsigned                gpio = irq_to_gpio(d->irq);
         struct pio_device       *pio = &pio_dev[gpio >> 5];
diff --git a/arch/avr32/mach-at32ap/pm-at32ap700x.S b/arch/avr32/mach-at32ap/pm-at32ap700x.S
index 17503b0ed6c9..f868f4ce761b 100644
--- a/arch/avr32/mach-at32ap/pm-at32ap700x.S
+++ b/arch/avr32/mach-at32ap/pm-at32ap700x.S
@@ -53,7 +53,7 @@ cpu_enter_idle:
         st.w    r8[TI_flags], r9
         unmask_interrupts
         sleep   CPU_SLEEP_IDLE
-        .size   cpu_idle_sleep, . - cpu_idle_sleep
+        .size   cpu_enter_idle, . - cpu_enter_idle
 
         /*
          * Common return path for PM functions that don't run from
diff --git a/arch/blackfin/include/asm/system.h b/arch/blackfin/include/asm/system.h
index 19e2c7c3e63a..44bd0cced725 100644
--- a/arch/blackfin/include/asm/system.h
+++ b/arch/blackfin/include/asm/system.h
@@ -19,11 +19,11 @@
  * Force strict CPU ordering.
  */
 #define nop()  __asm__ __volatile__ ("nop;\n\t" : : )
-#define mb()   __asm__ __volatile__ (""   : : : "memory")
-#define rmb()  __asm__ __volatile__ (""   : : : "memory")
-#define wmb()  __asm__ __volatile__ (""   : : : "memory")
-#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
-#define read_barrier_depends()          do { } while(0)
+#define smp_mb()  mb()
+#define smp_rmb() rmb()
+#define smp_wmb() wmb()
+#define set_mb(var, value) do { var = value; mb(); } while (0)
+#define smp_read_barrier_depends()      read_barrier_depends()
 
 #ifdef CONFIG_SMP
 asmlinkage unsigned long __raw_xchg_1_asm(volatile void *ptr, unsigned long value);
@@ -37,16 +37,16 @@ asmlinkage unsigned long __raw_cmpxchg_4_asm(volatile void *ptr,
                                         unsigned long new, unsigned long old);
 
 #ifdef __ARCH_SYNC_CORE_DCACHE
-# define smp_mb()       do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0)
-# define smp_rmb()      do { barrier(); smp_check_barrier(); } while (0)
-# define smp_wmb()      do { barrier(); smp_mark_barrier(); } while (0)
-#define smp_read_barrier_depends()      do { barrier(); smp_check_barrier(); } while (0)
-
+/* Force Core data cache coherence */
+# define mb()   do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0)
+# define rmb()  do { barrier(); smp_check_barrier(); } while (0)
+# define wmb()  do { barrier(); smp_mark_barrier(); } while (0)
+# define read_barrier_depends() do { barrier(); smp_check_barrier(); } while (0)
 #else
-# define smp_mb()       barrier()
-# define smp_rmb()      barrier()
-# define smp_wmb()      barrier()
-#define smp_read_barrier_depends()      barrier()
+# define mb()   barrier()
+# define rmb()  barrier()
+# define wmb()  barrier()
+# define read_barrier_depends() do { } while (0)
 #endif
 
 static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
@@ -99,10 +99,10 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
 
 #else /* !CONFIG_SMP */
 
-#define smp_mb()        barrier()
-#define smp_rmb()       barrier()
-#define smp_wmb()       barrier()
-#define smp_read_barrier_depends()      do { } while(0)
+#define mb()    barrier()
+#define rmb()   barrier()
+#define wmb()   barrier()
+#define read_barrier_depends()  do { } while (0)
 
 struct __xchg_dummy {
         unsigned long a[100];
diff --git a/arch/blackfin/kernel/gptimers.c b/arch/blackfin/kernel/gptimers.c
index cdbe075de1dc..8b81dc04488a 100644
--- a/arch/blackfin/kernel/gptimers.c
+++ b/arch/blackfin/kernel/gptimers.c
@@ -268,7 +268,7 @@ void disable_gptimers(uint16_t mask)
         _disable_gptimers(mask);
         for (i = 0; i < MAX_BLACKFIN_GPTIMERS; ++i)
                 if (mask & (1 << i))
-                        group_regs[BFIN_TIMER_OCTET(i)]->status |= trun_mask[i];
+                        group_regs[BFIN_TIMER_OCTET(i)]->status = trun_mask[i];
         SSYNC();
 }
 EXPORT_SYMBOL(disable_gptimers);
diff --git a/arch/blackfin/kernel/time-ts.c b/arch/blackfin/kernel/time-ts.c
index 8c9a43daf80f..cdb4beb6bc8f 100644
--- a/arch/blackfin/kernel/time-ts.c
+++ b/arch/blackfin/kernel/time-ts.c
@@ -206,8 +206,14 @@ irqreturn_t bfin_gptmr0_interrupt(int irq, void *dev_id)
 {
         struct clock_event_device *evt = dev_id;
         smp_mb();
-        evt->event_handler(evt);
+        /*
+         * We want to ACK before we handle so that we can handle smaller timer
+         * intervals.  This way if the timer expires again while we're handling
+         * things, we're more likely to see that 2nd int rather than swallowing
+         * it by ACKing the int at the end of this handler.
+         */
         bfin_gptmr0_ack();
+        evt->event_handler(evt);
         return IRQ_HANDLED;
 }
 
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index 6e17a265c4d3..8bce5ed031e4 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -109,10 +109,23 @@ static void ipi_flush_icache(void *info)
         struct blackfin_flush_data *fdata = info;
 
         /* Invalidate the memory holding the bounds of the flushed region. */
-        invalidate_dcache_range((unsigned long)fdata,
-                (unsigned long)fdata + sizeof(*fdata));
+        blackfin_dcache_invalidate_range((unsigned long)fdata,
+                                         (unsigned long)fdata + sizeof(*fdata));
+
+        /* Make sure all write buffers in the data side of the core
+         * are flushed before trying to invalidate the icache.  This
+         * needs to be after the data flush and before the icache
+         * flush so that the SSYNC does the right thing in preventing
+         * the instruction prefetcher from hitting things in cached
+         * memory at the wrong time -- it runs much further ahead than
+         * the pipeline.
+         */
+        SSYNC();
 
-        flush_icache_range(fdata->start, fdata->end);
+        /* ipi_flaush_icache is invoked by generic flush_icache_range,
+         * so call blackfin arch icache flush directly here.
+         */
+        blackfin_icache_flush_range(fdata->start, fdata->end);
 }
 
 static void ipi_call_function(unsigned int cpu, struct ipi_message *msg)
diff --git a/arch/m68k/include/asm/unistd.h b/arch/m68k/include/asm/unistd.h
index 26d851d385bb..29e17907d9f2 100644
--- a/arch/m68k/include/asm/unistd.h
+++ b/arch/m68k/include/asm/unistd.h
@@ -343,10 +343,14 @@
 #define __NR_fanotify_init      337
 #define __NR_fanotify_mark      338
 #define __NR_prlimit64          339
+#define __NR_name_to_handle_at  340
+#define __NR_open_by_handle_at  341
+#define __NR_clock_adjtime      342
+#define __NR_syncfs             343
 
 #ifdef __KERNEL__
 
-#define NR_syscalls             340
+#define NR_syscalls             344
 
 #define __ARCH_WANT_IPC_PARSE_VERSION
 #define __ARCH_WANT_OLD_READDIR
diff --git a/arch/m68k/kernel/entry_mm.S b/arch/m68k/kernel/entry_mm.S
index 1559dea36e55..1359ee659574 100644
--- a/arch/m68k/kernel/entry_mm.S
+++ b/arch/m68k/kernel/entry_mm.S
@@ -750,4 +750,8 @@ sys_call_table:
         .long sys_fanotify_init
         .long sys_fanotify_mark
         .long sys_prlimit64
+        .long sys_name_to_handle_at     /* 340 */
+        .long sys_open_by_handle_at
+        .long sys_clock_adjtime
+        .long sys_syncfs
 
diff --git a/arch/m68k/kernel/syscalltable.S b/arch/m68k/kernel/syscalltable.S
index 79b1ed198c07..9b8393d8adb8 100644
--- a/arch/m68k/kernel/syscalltable.S
+++ b/arch/m68k/kernel/syscalltable.S
@@ -358,6 +358,10 @@ ENTRY(sys_call_table)
         .long sys_fanotify_init
         .long sys_fanotify_mark
         .long sys_prlimit64
+        .long sys_name_to_handle_at     /* 340 */
+        .long sys_open_by_handle_at
+        .long sys_clock_adjtime
+        .long sys_syncfs
 
         .rept NR_syscalls-(.-sys_call_table)/4
                 .long sys_ni_syscall
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 851b3bf6e962..eccdefe70d4e 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -6,7 +6,6 @@ config MICROBLAZE
         select HAVE_FUNCTION_GRAPH_TRACER
         select HAVE_DYNAMIC_FTRACE
         select HAVE_FTRACE_MCOUNT_RECORD
-        select USB_ARCH_HAS_EHCI
         select ARCH_WANT_OPTIONAL_GPIOLIB
         select HAVE_OPROFILE
         select HAVE_ARCH_KGDB
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index b6ff882f695b..8f4d50b0adfa 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -209,7 +209,7 @@ config ARCH_HIBERNATION_POSSIBLE
 config ARCH_SUSPEND_POSSIBLE
         def_bool y
         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
-                   PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
+                   (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
 
 config PPC_DCR_NATIVE
         bool
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index be3cdf9134ce..1833d1a07e79 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -382,10 +382,12 @@ extern const char *powerpc_base_platform;
 #define CPU_FTRS_E500_2 (CPU_FTR_MAYBE_CAN_DOZE | CPU_FTR_USE_TB | \
             CPU_FTR_SPE_COMP | CPU_FTR_MAYBE_CAN_NAP | \
             CPU_FTR_NODSISRALIGN | CPU_FTR_NOEXECUTE)
-#define CPU_FTRS_E500MC (CPU_FTR_MAYBE_CAN_DOZE | CPU_FTR_USE_TB | \
-            CPU_FTR_MAYBE_CAN_NAP | CPU_FTR_NODSISRALIGN | \
+#define CPU_FTRS_E500MC (CPU_FTR_USE_TB | CPU_FTR_NODSISRALIGN | \
             CPU_FTR_L2CSR | CPU_FTR_LWSYNC | CPU_FTR_NOEXECUTE | \
             CPU_FTR_DBELL)
+#define CPU_FTRS_E5500  (CPU_FTR_USE_TB | CPU_FTR_NODSISRALIGN | \
+            CPU_FTR_L2CSR | CPU_FTR_LWSYNC | CPU_FTR_NOEXECUTE | \
+            CPU_FTR_DBELL | CPU_FTR_POPCNTB | CPU_FTR_POPCNTD)
 #define CPU_FTRS_GENERIC_32     (CPU_FTR_COMMON | CPU_FTR_NODSISRALIGN)
 
 /* 64-bit CPUs */
@@ -435,11 +437,15 @@ extern const char *powerpc_base_platform;
 #define CPU_FTRS_COMPATIBLE     (CPU_FTR_USE_TB | CPU_FTR_PPCAS_ARCH_V2)
 
 #ifdef __powerpc64__
+#ifdef CONFIG_PPC_BOOK3E
+#define CPU_FTRS_POSSIBLE       (CPU_FTRS_E5500)
+#else
 #define CPU_FTRS_POSSIBLE       \
             (CPU_FTRS_POWER3 | CPU_FTRS_RS64 | CPU_FTRS_POWER4 |        \
             CPU_FTRS_PPC970 | CPU_FTRS_POWER5 | CPU_FTRS_POWER6 |       \
             CPU_FTRS_POWER7 | CPU_FTRS_CELL | CPU_FTRS_PA6T |           \
             CPU_FTR_1T_SEGMENT | CPU_FTR_VSX)
+#endif
 #else
 enum {
         CPU_FTRS_POSSIBLE =
@@ -473,16 +479,21 @@ enum {
 #endif
 #ifdef CONFIG_E500
             CPU_FTRS_E500 | CPU_FTRS_E500_2 | CPU_FTRS_E500MC |
+            CPU_FTRS_E5500 |
 #endif
             0,
 };
 #endif /* __powerpc64__ */
 
 #ifdef __powerpc64__
+#ifdef CONFIG_PPC_BOOK3E
+#define CPU_FTRS_ALWAYS         (CPU_FTRS_E5500)
+#else
 #define CPU_FTRS_ALWAYS         \
             (CPU_FTRS_POWER3 & CPU_FTRS_RS64 & CPU_FTRS_POWER4 &        \
             CPU_FTRS_PPC970 & CPU_FTRS_POWER5 & CPU_FTRS_POWER6 &       \
             CPU_FTRS_POWER7 & CPU_FTRS_CELL & CPU_FTRS_PA6T & CPU_FTRS_POSSIBLE)
+#endif
 #else
 enum {
         CPU_FTRS_ALWAYS =
@@ -513,6 +524,7 @@ enum {
 #endif
 #ifdef CONFIG_E500
             CPU_FTRS_E500 & CPU_FTRS_E500_2 & CPU_FTRS_E500MC &
+            CPU_FTRS_E5500 &
 #endif
             CPU_FTRS_POSSIBLE,
 };
diff --git a/arch/powerpc/include/asm/pte-common.h b/arch/powerpc/include/asm/pte-common.h
index 811f04ac3660..8d1569c29042 100644
--- a/arch/powerpc/include/asm/pte-common.h
+++ b/arch/powerpc/include/asm/pte-common.h
@@ -162,7 +162,7 @@ extern unsigned long bad_call_to_PMD_PAGE_SIZE(void);
  * on platforms where such control is possible.
  */
 #if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) ||\
-        defined(CONFIG_KPROBES)
+        defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE)
 #define PAGE_KERNEL_TEXT        PAGE_KERNEL_X
 #else
 #define PAGE_KERNEL_TEXT        PAGE_KERNEL_ROX
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index c9b68d07ac4f..b9602ee06deb 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -1973,7 +1973,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
                 .pvr_mask               = 0xffff0000,
                 .pvr_value              = 0x80240000,
                 .cpu_name               = "e5500",
-                .cpu_features           = CPU_FTRS_E500MC,
+                .cpu_features           = CPU_FTRS_E5500,
                 .cpu_user_features      = COMMON_USER_BOOKE,
                 .mmu_features           = MMU_FTR_TYPE_FSL_E | MMU_FTR_BIG_PHYS |
                         MMU_FTR_USE_TLBILX,
diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
index 3d3d416339dd..5b5e1f002a8e 100644
--- a/arch/powerpc/kernel/crash.c
+++ b/arch/powerpc/kernel/crash.c
@@ -163,7 +163,7 @@ static void crash_kexec_prepare_cpus(int cpu)
 }
 
 /* wait for all the CPUs to hit real mode but timeout if they don't come in */
-#if defined(CONFIG_PPC_STD_MMU_64) && defined(CONFIG_SMP)
+#ifdef CONFIG_PPC_STD_MMU_64
 static void crash_kexec_wait_realmode(int cpu)
 {
         unsigned int msecs;
@@ -188,9 +188,7 @@ static void crash_kexec_wait_realmode(int cpu)
         }
         mb();
 }
-#else
-static inline void crash_kexec_wait_realmode(int cpu) {}
-#endif
+#endif  /* CONFIG_PPC_STD_MMU_64 */
 
 /*
  * This function will be called by secondary cpus or by kexec cpu
@@ -235,7 +233,9 @@ void crash_kexec_secondary(struct pt_regs *regs)
         crash_ipi_callback(regs);
 }
 
-#else
+#else   /* ! CONFIG_SMP */
+static inline void crash_kexec_wait_realmode(int cpu) {}
+
 static void crash_kexec_prepare_cpus(int cpu)
 {
         /*
@@ -255,7 +255,7 @@ void crash_kexec_secondary(struct pt_regs *regs)
 {
         cpus_in_sr = CPU_MASK_NONE;
 }
-#endif
+#endif  /* CONFIG_SMP */
 
 /*
  * Register a function to be called on shutdown.  Only use this if you
diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c
index c00d4ca1ee15..28581f1ad2c0 100644
--- a/arch/powerpc/kernel/ibmebus.c
+++ b/arch/powerpc/kernel/ibmebus.c
@@ -527,7 +527,7 @@ static int ibmebus_bus_pm_resume_noirq(struct device *dev)
 
 #endif /* !CONFIG_SUSPEND */
 
-#ifdef CONFIG_HIBERNATION
+#ifdef CONFIG_HIBERNATE_CALLBACKS
 
 static int ibmebus_bus_pm_freeze(struct device *dev)
 {
@@ -665,7 +665,7 @@ static int ibmebus_bus_pm_restore_noirq(struct device *dev)
         return ret;
 }
 
-#else /* !CONFIG_HIBERNATION */
+#else /* !CONFIG_HIBERNATE_CALLBACKS */
 
 #define ibmebus_bus_pm_freeze           NULL
 #define ibmebus_bus_pm_thaw             NULL
@@ -676,7 +676,7 @@ static int ibmebus_bus_pm_restore_noirq(struct device *dev)
 #define ibmebus_bus_pm_poweroff_noirq   NULL
 #define ibmebus_bus_pm_restore_noirq    NULL
 
-#endif /* !CONFIG_HIBERNATION */
+#endif /* !CONFIG_HIBERNATE_CALLBACKS */
 
 static struct dev_pm_ops ibmebus_bus_dev_pm_ops = {
         .prepare = ibmebus_bus_pm_prepare,
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index c834757bebc0..2b97b80d6d7d 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -330,9 +330,11 @@ void __init find_legacy_serial_ports(void)
                 if (!parent)
                         continue;
                 if (of_match_node(legacy_serial_parents, parent) != NULL) {
-                        index = add_legacy_soc_port(np, np);
-                        if (index >= 0 && np == stdout)
-                                legacy_serial_console = index;
+                        if (of_device_is_available(np)) {
+                                index = add_legacy_soc_port(np, np);
+                                if (index >= 0 && np == stdout)
+                                        legacy_serial_console = index;
+                        }
                 }
                 of_node_put(parent);
         }
diff --git a/arch/powerpc/kernel/perf_event.c b/arch/powerpc/kernel/perf_event.c
index c4063b7f49a0..822f63008ae1 100644
--- a/arch/powerpc/kernel/perf_event.c
+++ b/arch/powerpc/kernel/perf_event.c
@@ -398,6 +398,25 @@ static int check_excludes(struct perf_event **ctrs, unsigned int cflags[],
         return 0;
 }
 
+static u64 check_and_compute_delta(u64 prev, u64 val)
+{
+        u64 delta = (val - prev) & 0xfffffffful;
+
+        /*
+         * POWER7 can roll back counter values, if the new value is smaller
+         * than the previous value it will cause the delta and the counter to
+         * have bogus values unless we rolled a counter over.  If a coutner is
+         * rolled back, it will be smaller, but within 256, which is the maximum
+         * number of events to rollback at once.  If we dectect a rollback
+         * return 0.  This can lead to a small lack of precision in the
+         * counters.
+         */
+        if (prev > val && (prev - val) < 256)
+                delta = 0;
+
+        return delta;
+}
+
 static void power_pmu_read(struct perf_event *event)
 {
         s64 val, delta, prev;
@@ -416,10 +435,11 @@ static void power_pmu_read(struct perf_event *event)
                 prev = local64_read(&event->hw.prev_count);
                 barrier();
                 val = read_pmc(event->hw.idx);
+                delta = check_and_compute_delta(prev, val);
+                if (!delta)
+                        return;
         } while (local64_cmpxchg(&event->hw.prev_count, prev, val) != prev);
 
-        /* The counters are only 32 bits wide */
-        delta = (val - prev) & 0xfffffffful;
         local64_add(delta, &event->count);
         local64_sub(delta, &event->hw.period_left);
 }
@@ -449,8 +469,9 @@ static void freeze_limited_counters(struct cpu_hw_events *cpuhw,
                 val = (event->hw.idx == 5) ? pmc5 : pmc6;
                 prev = local64_read(&event->hw.prev_count);
                 event->hw.idx = 0;
-                delta = (val - prev) & 0xfffffffful;
-                local64_add(delta, &event->count);
+                delta = check_and_compute_delta(prev, val);
+                if (delta)
+                        local64_add(delta, &event->count);
         }
 }
 
@@ -458,14 +479,16 @@ static void thaw_limited_counters(struct cpu_hw_events *cpuhw,
                                   unsigned long pmc5, unsigned long pmc6)
 {
         struct perf_event *event;
-        u64 val;
+        u64 val, prev;
         int i;
 
         for (i = 0; i < cpuhw->n_limited; ++i) {
                 event = cpuhw->limited_counter[i];
                 event->hw.idx = cpuhw->limited_hwidx[i];
                 val = (event->hw.idx == 5) ? pmc5 : pmc6;
-                local64_set(&event->hw.prev_count, val);
+                prev = local64_read(&event->hw.prev_count);
+                if (check_and_compute_delta(prev, val))
+                        local64_set(&event->hw.prev_count, val);
                 perf_event_update_userpage(event);
         }
 }
@@ -1197,7 +1220,7 @@ static void record_and_restart(struct perf_event *event, unsigned long val,
 
         /* we don't have to worry about interrupts here */
         prev = local64_read(&event->hw.prev_count);
-        delta = (val - prev) & 0xfffffffful;
+        delta = check_and_compute_delta(prev, val);
         local64_add(delta, &event->count);
 
         /*
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 375480c56eb9..f33acfd872ad 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -229,6 +229,9 @@ static u64 scan_dispatch_log(u64 stop_tb)
         u64 stolen = 0;
         u64 dtb;
 
+        if (!dtl)
+                return 0;
+
         if (i == vpa->dtl_idx)
                 return 0;
         while (i < vpa->dtl_idx) {
diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c
index a830c5e80657..bc5f0dc6ae1e 100644
--- a/arch/powerpc/platforms/powermac/smp.c
+++ b/arch/powerpc/platforms/powermac/smp.c
@@ -842,6 +842,7 @@ static void __devinit smp_core99_setup_cpu(int cpu_nr)
         mpic_setup_this_cpu();
 }
 
+#ifdef CONFIG_PPC64
 #ifdef CONFIG_HOTPLUG_CPU
 static int smp_core99_cpu_notify(struct notifier_block *self,
                                  unsigned long action, void *hcpu)
@@ -879,7 +880,6 @@ static struct notifier_block __cpuinitdata smp_core99_cpu_nb = {
 
 static void __init smp_core99_bringup_done(void)
 {
-#ifdef CONFIG_PPC64
         extern void g5_phy_disable_cpu1(void);
 
         /* Close i2c bus if it was used for tb sync */
@@ -894,14 +894,14 @@ static void __init smp_core99_bringup_done(void)
                 set_cpu_present(1, false);
                 g5_phy_disable_cpu1();
         }
-#endif /* CONFIG_PPC64 */
-
 #ifdef CONFIG_HOTPLUG_CPU
         register_cpu_notifier(&smp_core99_cpu_nb);
 #endif
+
         if (ppc_md.progress)
                 ppc_md.progress("smp_core99_bringup_done", 0x349);
 }
+#endif /* CONFIG_PPC64 */
 
 #ifdef CONFIG_HOTPLUG_CPU
 
@@ -975,7 +975,9 @@ static void pmac_cpu_die(void)
 struct smp_ops_t core99_smp_ops = {
         .message_pass   = smp_mpic_message_pass,
         .probe          = smp_core99_probe,
+#ifdef CONFIG_PPC64
         .bringup_done   = smp_core99_bringup_done,
+#endif
         .kick_cpu       = smp_core99_kick_cpu,
         .setup_cpu      = smp_core99_setup_cpu,
         .give_timebase  = smp_core99_give_timebase,
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 000724149089..6c42cfde8415 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -287,14 +287,22 @@ static int alloc_dispatch_logs(void)
         int cpu, ret;
         struct paca_struct *pp;
         struct dtl_entry *dtl;
+        struct kmem_cache *dtl_cache;
 
         if (!firmware_has_feature(FW_FEATURE_SPLPAR))
                 return 0;
 
+        dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES,
+                                                DISPATCH_LOG_BYTES, 0, NULL);
+        if (!dtl_cache) {
+                pr_warn("Failed to create dispatch trace log buffer cache\n");
+                pr_warn("Stolen time statistics will be unreliable\n");
+                return 0;
+        }
+
         for_each_possible_cpu(cpu) {
                 pp = &paca[cpu];
-                dtl = kmalloc_node(DISPATCH_LOG_BYTES, GFP_KERNEL,
-                                   cpu_to_node(cpu));
+                dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL);
                 if (!dtl) {
                         pr_warn("Failed to allocate dispatch trace log for cpu %d\n",
                                 cpu);
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index f8f7f28c6343..68ca9290df94 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -324,6 +324,11 @@ int __init fsl_add_bridge(struct device_node *dev, int is_primary)
         struct resource rsrc;
         const int *bus_range;
 
+        if (!of_device_is_available(dev)) {
+                pr_warning("%s: disabled\n", dev->full_name);
+                return -ENODEV;
+        }
+
         pr_debug("Adding PCI host bridge %s\n", dev->full_name);
 
         /* Fetch host bridge registers address */
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index 14232d57369c..49798532b477 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -1457,7 +1457,6 @@ int fsl_rio_setup(struct platform_device *dev)
         port->ops = ops;
         port->priv = priv;
         port->phys_efptr = 0x100;
-        rio_register_mport(port);
 
         priv->regs_win = ioremap(regs.start, regs.end - regs.start + 1);
         rio_regs_win = priv->regs_win;
@@ -1504,6 +1503,9 @@ int fsl_rio_setup(struct platform_device *dev)
         dev_info(&dev->dev, "RapidIO Common Transport System size: %d\n",
                         port->sys_size ? 65536 : 256);
 
+        if (rio_register_mport(port))
+                goto err;
+
         if (port->host_deviceid >= 0)
                 out_be32(priv->regs_win + RIO_GCCSR, RIO_PORT_GEN_HOST |
                         RIO_PORT_GEN_MASTER | RIO_PORT_GEN_DISCOVERED);
diff --git a/arch/um/Kconfig.x86 b/arch/um/Kconfig.x86
index 02fb017fed47..a9da516a5274 100644
--- a/arch/um/Kconfig.x86
+++ b/arch/um/Kconfig.x86
@@ -4,6 +4,10 @@ menu "UML-specific options"
 
 menu "Host processor type and features"
 
+config CMPXCHG_LOCAL
+        bool
+        default n
+
 source "arch/x86/Kconfig.cpu"
 
 endmenu
diff --git a/arch/um/include/asm/bug.h b/arch/um/include/asm/bug.h
new file mode 100644
index 000000000000..9e33b864c359
--- /dev/null
+++ b/arch/um/include/asm/bug.h
@@ -0,0 +1,6 @@
+#ifndef __UM_BUG_H
+#define __UM_BUG_H
+
+#include <asm-generic/bug.h>
+
+#endif
diff --git a/arch/x86/include/asm/gart.h b/arch/x86/include/asm/gart.h
index 43085bfc99c3..156cd5d18d2a 100644
--- a/arch/x86/include/asm/gart.h
+++ b/arch/x86/include/asm/gart.h
@@ -66,7 +66,7 @@ static inline void gart_set_size_and_enable(struct pci_dev *dev, u32 order)
          * Don't enable translation but enable GART IO and CPU accesses.
          * Also, set DISTLBWALKPRB since GART tables memory is UC.
          */
-        ctl = DISTLBWALKPRB | order << 1;
+        ctl = order << 1;
 
         pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
 }
@@ -75,17 +75,17 @@ static inline void enable_gart_translation(struct pci_dev *dev, u64 addr)
 {
         u32 tmp, ctl;
 
-        /* address of the mappings table */
-        addr >>= 12;
-        tmp = (u32) addr<<4;
-        tmp &= ~0xf;
-        pci_write_config_dword(dev, AMD64_GARTTABLEBASE, tmp);
-
-        /* Enable GART translation for this hammer. */
-        pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl);
-        ctl |= GARTEN;
-        ctl &= ~(DISGARTCPU | DISGARTIO);
-        pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
+        /* address of the mappings table */
+        addr >>= 12;
+        tmp = (u32) addr<<4;
+        tmp &= ~0xf;
+        pci_write_config_dword(dev, AMD64_GARTTABLEBASE, tmp);
+
+        /* Enable GART translation for this hammer. */
+        pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl);
+        ctl |= GARTEN | DISTLBWALKPRB;
+        ctl &= ~(DISGARTCPU | DISGARTIO);
+        pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
 }
 
 static inline int aperture_valid(u64 aper_base, u32 aper_size, u32 min_size)
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index fd5a1f365c95..3cce71413d0b 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -96,11 +96,15 @@
 #define MSR_IA32_MC0_ADDR               0x00000402
 #define MSR_IA32_MC0_MISC               0x00000403
 
+#define MSR_AMD64_MC0_MASK              0xc0010044
+
 #define MSR_IA32_MCx_CTL(x)             (MSR_IA32_MC0_CTL + 4*(x))
 #define MSR_IA32_MCx_STATUS(x)          (MSR_IA32_MC0_STATUS + 4*(x))
 #define MSR_IA32_MCx_ADDR(x)            (MSR_IA32_MC0_ADDR + 4*(x))
 #define MSR_IA32_MCx_MISC(x)            (MSR_IA32_MC0_MISC + 4*(x))
 
+#define MSR_AMD64_MCx_MASK(x)           (MSR_AMD64_MC0_MASK + (x))
+
 /* These are consecutive and not in the normal 4er MCE bank block */
 #define MSR_IA32_MC0_CTL2               0x00000280
 #define MSR_IA32_MCx_CTL2(x)            (MSR_IA32_MC0_CTL2 + (x))
diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
index 86d1ad4962a7..73fb469908c6 100644
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -499,7 +499,7 @@ out:
                  * Don't enable translation yet but enable GART IO and CPU
                  * accesses and set DISTLBWALKPRB since GART table memory is UC.
                  */
-                u32 ctl = DISTLBWALKPRB | aper_order << 1;
+                u32 ctl = aper_order << 1;
 
                 bus = amd_nb_bus_dev_ranges[i].bus;
                 dev_base = amd_nb_bus_dev_ranges[i].dev_base;
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 3ecece0217ef..3532d3bf8105 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -615,6 +615,25 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
         /* As a rule processors have APIC timer running in deep C states */
         if (c->x86 >= 0xf && !cpu_has_amd_erratum(amd_erratum_400))
                 set_cpu_cap(c, X86_FEATURE_ARAT);
+
+        /*
+         * Disable GART TLB Walk Errors on Fam10h. We do this here
+         * because this is always needed when GART is enabled, even in a
+         * kernel which has no MCE support built in.
+         */
+        if (c->x86 == 0x10) {
+                /*
+                 * BIOS should disable GartTlbWlk Errors themself. If
+                 * it doesn't do it here as suggested by the BKDG.
+                 *
+                 * Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=33012
+                 */
+                u64 mask;
+
+                rdmsrl(MSR_AMD64_MCx_MASK(4), mask);
+                mask |= (1 << 10);
+                wrmsrl(MSR_AMD64_MCx_MASK(4), mask);
+        }
 }
 
 #ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
index 461f62bbd774..cf4e369cea67 100644
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -8,7 +8,7 @@ static __initconst const u64 amd_hw_cache_event_ids
  [ C(L1D) ] = {
         [ C(OP_READ) ] = {
                 [ C(RESULT_ACCESS) ] = 0x0040, /* Data Cache Accesses        */
-                [ C(RESULT_MISS)   ] = 0x0041, /* Data Cache Misses          */
+                [ C(RESULT_MISS)   ] = 0x0141, /* Data Cache Misses          */
         },
         [ C(OP_WRITE) ] = {
                 [ C(RESULT_ACCESS) ] = 0x0142, /* Data Cache Refills :system */
@@ -427,7 +427,9 @@ static __initconst const struct x86_pmu amd_pmu = {
  *
  * Exceptions:
  *
+ * 0x000        FP      PERF_CTL[3], PERF_CTL[5:3] (*)
  * 0x003        FP      PERF_CTL[3]
+ * 0x004        FP      PERF_CTL[3], PERF_CTL[5:3] (*)
  * 0x00B        FP      PERF_CTL[3]
  * 0x00D        FP      PERF_CTL[3]
  * 0x023        DE      PERF_CTL[2:0]
@@ -448,6 +450,8 @@ static __initconst const struct x86_pmu amd_pmu = {
  * 0x0DF        LS      PERF_CTL[5:0]
  * 0x1D6        EX      PERF_CTL[5:0]
  * 0x1D8        EX      PERF_CTL[5:0]
+ *
+ * (*) depending on the umask all FPU counters may be used
  */
 
 static struct event_constraint amd_f15_PMC0  = EVENT_CONSTRAINT(0, 0x01, 0);
@@ -460,18 +464,28 @@ static struct event_constraint amd_f15_PMC53 = EVENT_CONSTRAINT(0, 0x38, 0);
 static struct event_constraint *
 amd_get_event_constraints_f15h(struct cpu_hw_events *cpuc, struct perf_event *event)
 {
-        unsigned int event_code = amd_get_event_code(&event->hw);
+        struct hw_perf_event *hwc = &event->hw;
+        unsigned int event_code = amd_get_event_code(hwc);
 
         switch (event_code & AMD_EVENT_TYPE_MASK) {
         case AMD_EVENT_FP:
                 switch (event_code) {
+                case 0x000:
+                        if (!(hwc->config & 0x0000F000ULL))
+                                break;
+                        if (!(hwc->config & 0x00000F00ULL))
+                                break;
+                        return &amd_f15_PMC3;
+                case 0x004:
+                        if (hweight_long(hwc->config & ARCH_PERFMON_EVENTSEL_UMASK) <= 1)
+                                break;
+                        return &amd_f15_PMC3;
                 case 0x003:
                 case 0x00B:
                 case 0x00D:
                         return &amd_f15_PMC3;
-                default:
-                        return &amd_f15_PMC53;
                 }
+                return &amd_f15_PMC53;
         case AMD_EVENT_LS:
         case AMD_EVENT_DC:
         case AMD_EVENT_EX_LS:
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index 82ada01625b9..b117efd24f71 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -81,6 +81,9 @@ static u32 gart_unmapped_entry;
 #define AGPEXTERN
 #endif
 
+/* GART can only remap to physical addresses < 1TB */
+#define GART_MAX_PHYS_ADDR      (1ULL << 40)
+
 /* backdoor interface to AGP driver */
 AGPEXTERN int agp_memory_reserved;
 AGPEXTERN __u32 *agp_gatt_table;
@@ -212,9 +215,13 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
                                 size_t size, int dir, unsigned long align_mask)
 {
         unsigned long npages = iommu_num_pages(phys_mem, size, PAGE_SIZE);
-        unsigned long iommu_page = alloc_iommu(dev, npages, align_mask);
+        unsigned long iommu_page;
         int i;
 
+        if (unlikely(phys_mem + size > GART_MAX_PHYS_ADDR))
+                return bad_dma_addr;
+
+        iommu_page = alloc_iommu(dev, npages, align_mask);
         if (iommu_page == -1) {
                 if (!nonforced_iommu(dev, phys_mem, size))
                         return phys_mem;
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index c2871d3c71b6..8ed8908cc9f7 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -312,6 +312,26 @@ void __cpuinit smp_store_cpu_info(int id)
                 identify_secondary_cpu(c);
 }
 
+static void __cpuinit check_cpu_siblings_on_same_node(int cpu1, int cpu2)
+{
+        int node1 = early_cpu_to_node(cpu1);
+        int node2 = early_cpu_to_node(cpu2);
+
+        /*
+         * Our CPU scheduler assumes all logical cpus in the same physical cpu
+         * share the same node. But, buggy ACPI or NUMA emulation might assign
+         * them to different node. Fix it.
+         */
+        if (node1 != node2) {
+                pr_warning("CPU %d in node %d and CPU %d in node %d are in the same physical CPU. forcing same node %d\n",
+                           cpu1, node1, cpu2, node2, node2);
+
+                numa_remove_cpu(cpu1);
+                numa_set_node(cpu1, node2);
+                numa_add_cpu(cpu1);
+        }
+}
+
 static void __cpuinit link_thread_siblings(int cpu1, int cpu2)
 {
         cpumask_set_cpu(cpu1, cpu_sibling_mask(cpu2));
@@ -320,6 +340,7 @@ static void __cpuinit link_thread_siblings(int cpu1, int cpu2)
         cpumask_set_cpu(cpu2, cpu_core_mask(cpu1));
         cpumask_set_cpu(cpu1, cpu_llc_shared_mask(cpu2));
         cpumask_set_cpu(cpu2, cpu_llc_shared_mask(cpu1));
+        check_cpu_siblings_on_same_node(cpu1, cpu2);
 }
 
 
@@ -361,10 +382,12 @@ void __cpuinit set_cpu_sibling_map(int cpu)
                     per_cpu(cpu_llc_id, cpu) == per_cpu(cpu_llc_id, i)) {
                         cpumask_set_cpu(i, cpu_llc_shared_mask(cpu));
                         cpumask_set_cpu(cpu, cpu_llc_shared_mask(i));
+                        check_cpu_siblings_on_same_node(cpu, i);
                 }
                 if (c->phys_proc_id == cpu_data(i).phys_proc_id) {
                         cpumask_set_cpu(i, cpu_core_mask(cpu));
                         cpumask_set_cpu(cpu, cpu_core_mask(i));
+                        check_cpu_siblings_on_same_node(cpu, i);
                         /*
                          *  Does this new cpu bringup a new core?
                          */
diff --git a/arch/x86/platform/ce4100/falconfalls.dts b/arch/x86/platform/ce4100/falconfalls.dts
index dc701ea58546..2d6d226f2b10 100644
--- a/arch/x86/platform/ce4100/falconfalls.dts
+++ b/arch/x86/platform/ce4100/falconfalls.dts
@@ -74,6 +74,7 @@
                                 compatible = "intel,ce4100-pci", "pci";
                                 device_type = "pci";
                                 bus-range = <1 1>;
+                                reg = <0x0800 0x0 0x0 0x0 0x0>;
                                 ranges = <0x2000000 0 0xdffe0000 0x2000000 0 0xdffe0000 0 0x1000>;
 
                                 interrupt-parent = <&ioapic2>;
@@ -412,6 +413,7 @@
                                 #address-cells = <2>;
                                 #size-cells = <1>;
                                 compatible = "isa";
+                                reg = <0xf800 0x0 0x0 0x0 0x0>;
                                 ranges = <1 0 0 0 0 0x100>;
 
                                 rtc@70 {
diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c
index 5c0207bf959b..275dbc19e2cf 100644
--- a/arch/x86/platform/mrst/mrst.c
+++ b/arch/x86/platform/mrst/mrst.c
@@ -97,11 +97,11 @@ static int __init sfi_parse_mtmr(struct sfi_table_header *table)
                         pentry->freq_hz, pentry->irq);
                         if (!pentry->irq)
                                 continue;
-                        mp_irq.type = MP_IOAPIC;
+                        mp_irq.type = MP_INTSRC;
                         mp_irq.irqtype = mp_INT;
 /* triggering mode edge bit 2-3, active high polarity bit 0-1 */
                         mp_irq.irqflag = 5;
-                        mp_irq.srcbus = 0;
+                        mp_irq.srcbus = MP_BUS_ISA;
                         mp_irq.srcbusirq = pentry->irq; /* IRQ */
                         mp_irq.dstapic = MP_APIC_ALL;
                         mp_irq.dstirq = pentry->irq;
@@ -168,10 +168,10 @@ int __init sfi_parse_mrtc(struct sfi_table_header *table)
         for (totallen = 0; totallen < sfi_mrtc_num; totallen++, pentry++) {
                 pr_debug("RTC[%d]: paddr = 0x%08x, irq = %d\n",
                         totallen, (u32)pentry->phys_addr, pentry->irq);
-                mp_irq.type = MP_IOAPIC;
+                mp_irq.type = MP_INTSRC;
                 mp_irq.irqtype = mp_INT;
                 mp_irq.irqflag = 0xf;   /* level trigger and active low */
-                mp_irq.srcbus = 0;
+                mp_irq.srcbus = MP_BUS_ISA;
                 mp_irq.srcbusirq = pentry->irq; /* IRQ */
                 mp_irq.dstapic = MP_APIC_ALL;
                 mp_irq.dstirq = pentry->irq;
@@ -282,7 +282,7 @@ void __init x86_mrst_early_setup(void)
         /* Avoid searching for BIOS MP tables */
         x86_init.mpparse.find_smp_config = x86_init_noop;
         x86_init.mpparse.get_smp_config = x86_init_uint_noop;
-
+        set_bit(MP_BUS_ISA, mp_bus_not_pci);
 }
 
 /*
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index 1c7121ba18ff..5cc821cb2e09 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -39,6 +39,7 @@ config XEN_MAX_DOMAIN_MEMORY
 config XEN_SAVE_RESTORE
        bool
        depends on XEN
+       select HIBERNATE_CALLBACKS
        default y
 
 config XEN_DEBUG_FS
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 49dbd78ec3cb..e3c6a06cf725 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -238,6 +238,7 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
 static __init void xen_init_cpuid_mask(void)
 {
         unsigned int ax, bx, cx, dx;
+        unsigned int xsave_mask;
 
         cpuid_leaf1_edx_mask =
                 ~((1 << X86_FEATURE_MCE)  |  /* disable MCE */
@@ -249,24 +250,16 @@ static __init void xen_init_cpuid_mask(void)
                 cpuid_leaf1_edx_mask &=
                         ~((1 << X86_FEATURE_APIC) |  /* disable local APIC */
                           (1 << X86_FEATURE_ACPI));  /* disable ACPI */
-
         ax = 1;
-        cx = 0;
         xen_cpuid(&ax, &bx, &cx, &dx);
 
-        /* cpuid claims we support xsave; try enabling it to see what happens */
-        if (cx & (1 << (X86_FEATURE_XSAVE % 32))) {
-                unsigned long cr4;
-
-                set_in_cr4(X86_CR4_OSXSAVE);
-                
-                cr4 = read_cr4();
+        xsave_mask =
+                (1 << (X86_FEATURE_XSAVE % 32)) |
+                (1 << (X86_FEATURE_OSXSAVE % 32));
 
-                if ((cr4 & X86_CR4_OSXSAVE) == 0)
-                        cpuid_leaf1_ecx_mask &= ~(1 << (X86_FEATURE_XSAVE % 32));
-
-                clear_in_cr4(X86_CR4_OSXSAVE);
-        }
+        /* Xen will set CR4.OSXSAVE if supported and not disabled by force */
+        if ((cx & xsave_mask) != xsave_mask)
+                cpuid_leaf1_ecx_mask &= ~xsave_mask; /* disable XSAVE & OSXSAVE */
 }
 
 static void xen_set_debugreg(int reg, unsigned long val)
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index c82df6c9c0f0..aef7af92b28b 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -565,13 +565,13 @@ pte_t xen_make_pte_debug(pteval_t pte)
         if (io_page &&
             (xen_initial_domain() || addr >= ISA_END_ADDRESS)) {
                 other_addr = pfn_to_mfn(addr >> PAGE_SHIFT) << PAGE_SHIFT;
-                WARN(addr != other_addr,
+                WARN_ONCE(addr != other_addr,
                         "0x%lx is using VM_IO, but it is 0x%lx!\n",
                         (unsigned long)addr, (unsigned long)other_addr);
         } else {
                 pteval_t iomap_set = (_pte.pte & PTE_FLAGS_MASK) & _PAGE_IOMAP;
                 other_addr = (_pte.pte & PTE_PFN_MASK);
-                WARN((addr == other_addr) && (!io_page) && (!iomap_set),
+                WARN_ONCE((addr == other_addr) && (!io_page) && (!iomap_set),
                         "0x%lx is missing VM_IO (and wasn't fixed)!\n",
                         (unsigned long)addr);
         }
@@ -1473,16 +1473,20 @@ static void xen_pgd_free(struct mm_struct *mm, pgd_t *pgd)
 #endif
 }
 
+#ifdef CONFIG_X86_32
 static __init pte_t mask_rw_pte(pte_t *ptep, pte_t pte)
 {
-        unsigned long pfn = pte_pfn(pte);
-
-#ifdef CONFIG_X86_32
         /* If there's an existing pte, then don't allow _PAGE_RW to be set */
         if (pte_val_ma(*ptep) & _PAGE_PRESENT)
                 pte = __pte_ma(((pte_val_ma(*ptep) & _PAGE_RW) | ~_PAGE_RW) &
                                pte_val_ma(pte));
-#endif
+
+        return pte;
+}
+#else /* CONFIG_X86_64 */
+static __init pte_t mask_rw_pte(pte_t *ptep, pte_t pte)
+{
+        unsigned long pfn = pte_pfn(pte);
 
         /*
          * If the new pfn is within the range of the newly allocated
@@ -1497,6 +1501,7 @@ static __init pte_t mask_rw_pte(pte_t *ptep, pte_t pte)
 
         return pte;
 }
+#endif /* CONFIG_X86_64 */
 
 /* Init-time set_pte while constructing initial pagetables, which
    doesn't allow RO pagetable pages to be remapped RW */
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index fa0269a99377..90bac0aac3a5 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -227,7 +227,7 @@ char * __init xen_memory_setup(void)
 
         memcpy(map_raw, map, sizeof(map));
         e820.nr_map = 0;
-        xen_extra_mem_start = mem_end;
+        xen_extra_mem_start = max((1ULL << 32), mem_end);
         for (i = 0; i < memmap.nr_entries; i++) {
                 unsigned long long end;