Merge branch 'v3.2-rc6' into next/drivers

25 files changed, 177 insertions, 181 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 96804b5dd21b..b8c69726839c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -220,8 +220,9 @@ config NEED_MACH_MEMORY_H
 	  be avoided when possible.
 
 config PHYS_OFFSET
-	hex "Physical address of main memory"
+	hex "Physical address of main memory" if MMU
 	depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
+	default DRAM_BASE if !MMU
 	help
 	  Please provide the physical address corresponding to the
 	  location of main memory in your system.
diff --git a/arch/arm/include/asm/unwind.h b/arch/arm/include/asm/unwind.h
index a5edf421005c..d1c3f3a71c94 100644
--- a/arch/arm/include/asm/unwind.h
+++ b/arch/arm/include/asm/unwind.h
@@ -30,14 +30,15 @@ enum unwind_reason_code {
 };
 
 struct unwind_idx {
-	unsigned long addr;
+	unsigned long addr_offset;
 	unsigned long insn;
 };
 
 struct unwind_table {
 	struct list_head list;
-	struct unwind_idx *start;
-	struct unwind_idx *stop;
+	const struct unwind_idx *start;
+	const struct unwind_idx *origin;
+	const struct unwind_idx *stop;
 	unsigned long begin_addr;
 	unsigned long end_addr;
 };
@@ -49,15 +50,6 @@ extern struct unwind_table *unwind_table_add(unsigned long start,
 extern void unwind_table_del(struct unwind_table *tab);
 extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk);
 
-#ifdef CONFIG_ARM_UNWIND
-extern int __init unwind_init(void);
-#else
-static inline int __init unwind_init(void)
-{
-	return 0;
-}
-#endif
-
 #endif	/* !__ASSEMBLY__ */
 
 #ifdef CONFIG_ARM_UNWIND
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 8e9c98edc068..88b0941ce51e 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -640,6 +640,9 @@ static struct platform_device_id armpmu_plat_device_ids[] = {
 
 static int __devinit armpmu_device_probe(struct platform_device *pdev)
 {
+	if (!cpu_pmu)
+		return -ENODEV;
+
 	cpu_pmu->plat_device = pdev;
 	return 0;
 }
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 3448a3f9cc8c..8fc2c8fcbdc6 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -895,8 +895,6 @@ void __init setup_arch(char **cmdline_p)
 {
 	struct machine_desc *mdesc;
 
-	unwind_init();
-
 	setup_processor();
 	mdesc = setup_machine_fdt(__atags_pointer);
 	if (!mdesc)
@@ -904,6 +902,12 @@ void __init setup_arch(char **cmdline_p)
 	machine_desc = mdesc;
 	machine_name = mdesc->name;
 
+#ifdef CONFIG_ZONE_DMA
+	if (mdesc->dma_zone_size) {
+		extern unsigned long arm_dma_zone_size;
+		arm_dma_zone_size = mdesc->dma_zone_size;
+	}
+#endif
 	if (mdesc->soft_reboot)
 		reboot_setup("s");
 
@@ -934,12 +938,6 @@ void __init setup_arch(char **cmdline_p)
 
 	tcm_init();
 
-#ifdef CONFIG_ZONE_DMA
-	if (mdesc->dma_zone_size) {
-		extern unsigned long arm_dma_zone_size;
-		arm_dma_zone_size = mdesc->dma_zone_size;
-	}
-#endif
 #ifdef CONFIG_MULTI_IRQ_HANDLER
 	handle_arch_irq = mdesc->handle_irq;
 #endif
diff --git a/arch/arm/kernel/unwind.c b/arch/arm/kernel/unwind.c
index e7e8365795c3..00df012c4678 100644
--- a/arch/arm/kernel/unwind.c
+++ b/arch/arm/kernel/unwind.c
@@ -67,7 +67,7 @@ EXPORT_SYMBOL(__aeabi_unwind_cpp_pr2);
 
 struct unwind_ctrl_block {
 	unsigned long vrs[16];		/* virtual register set */
-	unsigned long *insn;		/* pointer to the current instructions word */
+	const unsigned long *insn;	/* pointer to the current instructions word */
 	int entries;			/* number of entries left to interpret */
 	int byte;			/* current byte number in the instructions word */
 };
@@ -83,8 +83,9 @@ enum regs {
 	PC = 15
 };
 
-extern struct unwind_idx __start_unwind_idx[];
-extern struct unwind_idx __stop_unwind_idx[];
+extern const struct unwind_idx __start_unwind_idx[];
+static const struct unwind_idx *__origin_unwind_idx;
+extern const struct unwind_idx __stop_unwind_idx[];
 
 static DEFINE_SPINLOCK(unwind_lock);
 static LIST_HEAD(unwind_tables);
@@ -98,45 +99,99 @@ static LIST_HEAD(unwind_tables);
 })
 
 /*
- * Binary search in the unwind index. The entries entries are
+ * Binary search in the unwind index. The entries are
  * guaranteed to be sorted in ascending order by the linker.
+ *
+ * start = first entry
+ * origin = first entry with positive offset (or stop if there is no such entry)
+ * stop - 1 = last entry
  */
-static struct unwind_idx *search_index(unsigned long addr,
-				       struct unwind_idx *first,
-				       struct unwind_idx *last)
+static const struct unwind_idx *search_index(unsigned long addr,
+				       const struct unwind_idx *start,
+				       const struct unwind_idx *origin,
+				       const struct unwind_idx *stop)
 {
-	pr_debug("%s(%08lx, %p, %p)\n", __func__, addr, first, last);
+	unsigned long addr_prel31;
+
+	pr_debug("%s(%08lx, %p, %p, %p)\n",
+			__func__, addr, start, origin, stop);
+
+	/*
+	 * only search in the section with the matching sign. This way the
+	 * prel31 numbers can be compared as unsigned longs.
+	 */
+	if (addr < (unsigned long)start)
+		/* negative offsets: [start; origin) */
+		stop = origin;
+	else
+		/* positive offsets: [origin; stop) */
+		start = origin;
+
+	/* prel31 for address relavive to start */
+	addr_prel31 = (addr - (unsigned long)start) & 0x7fffffff;
 
-	if (addr < first->addr) {
+	while (start < stop - 1) {
+		const struct unwind_idx *mid = start + ((stop - start) >> 1);
+
+		/*
+		 * As addr_prel31 is relative to start an offset is needed to
+		 * make it relative to mid.
+		 */
+		if (addr_prel31 - ((unsigned long)mid - (unsigned long)start) <
+				mid->addr_offset)
+			stop = mid;
+		else {
+			/* keep addr_prel31 relative to start */
+			addr_prel31 -= ((unsigned long)mid -
+					(unsigned long)start);
+			start = mid;
+		}
+	}
+
+	if (likely(start->addr_offset <= addr_prel31))
+		return start;
+	else {
 		pr_warning("unwind: Unknown symbol address %08lx\n", addr);
 		return NULL;
-	} else if (addr >= last->addr)
-		return last;
+	}
+}
 
-	while (first < last - 1) {
-		struct unwind_idx *mid = first + ((last - first + 1) >> 1);
+static const struct unwind_idx *unwind_find_origin(
+		const struct unwind_idx *start, const struct unwind_idx *stop)
+{
+	pr_debug("%s(%p, %p)\n", __func__, start, stop);
+	while (start < stop) {
+		const struct unwind_idx *mid = start + ((stop - start) >> 1);
 
-		if (addr < mid->addr)
-			last = mid;
+		if (mid->addr_offset >= 0x40000000)
+			/* negative offset */
+			start = mid + 1;
 		else
-			first = mid;
+			/* positive offset */
+			stop = mid;
 	}
-
-	return first;
+	pr_debug("%s -> %p\n", __func__, stop);
+	return stop;
 }
 
-static struct unwind_idx *unwind_find_idx(unsigned long addr)
+static const struct unwind_idx *unwind_find_idx(unsigned long addr)
 {
-	struct unwind_idx *idx = NULL;
+	const struct unwind_idx *idx = NULL;
 	unsigned long flags;
 
 	pr_debug("%s(%08lx)\n", __func__, addr);
 
-	if (core_kernel_text(addr))
+	if (core_kernel_text(addr)) {
+		if (unlikely(!__origin_unwind_idx))
+			__origin_unwind_idx =
+				unwind_find_origin(__start_unwind_idx,
+						__stop_unwind_idx);
+
 		/* main unwind table */
 		idx = search_index(addr, __start_unwind_idx,
-				   __stop_unwind_idx - 1);
-	else {
+				   __origin_unwind_idx,
+				   __stop_unwind_idx);
+	} else {
 		/* module unwind tables */
 		struct unwind_table *table;
 
@@ -145,7 +200,8 @@ static struct unwind_idx *unwind_find_idx(unsigned long addr)
 			if (addr >= table->begin_addr &&
 			    addr < table->end_addr) {
 				idx = search_index(addr, table->start,
-						   table->stop - 1);
+						   table->origin,
+						   table->stop);
 				/* Move-to-front to exploit common traces */
 				list_move(&table->list, &unwind_tables);
 				break;
@@ -274,7 +330,7 @@ static int unwind_exec_insn(struct unwind_ctrl_block *ctrl)
 int unwind_frame(struct stackframe *frame)
 {
 	unsigned long high, low;
-	struct unwind_idx *idx;
+	const struct unwind_idx *idx;
 	struct unwind_ctrl_block ctrl;
 
 	/* only go to a higher address on the stack */
@@ -399,7 +455,6 @@ struct unwind_table *unwind_table_add(unsigned long start, unsigned long size,
 				      unsigned long text_size)
 {
 	unsigned long flags;
-	struct unwind_idx *idx;
 	struct unwind_table *tab = kmalloc(sizeof(*tab), GFP_KERNEL);
 
 	pr_debug("%s(%08lx, %08lx, %08lx, %08lx)\n", __func__, start, size,
@@ -408,15 +463,12 @@ struct unwind_table *unwind_table_add(unsigned long start, unsigned long size,
 	if (!tab)
 		return tab;
 
-	tab->start = (struct unwind_idx *)start;
-	tab->stop = (struct unwind_idx *)(start + size);
+	tab->start = (const struct unwind_idx *)start;
+	tab->stop = (const struct unwind_idx *)(start + size);
+	tab->origin = unwind_find_origin(tab->start, tab->stop);
 	tab->begin_addr = text_addr;
 	tab->end_addr = text_addr + text_size;
 
-	/* Convert the symbol addresses to absolute values */
-	for (idx = tab->start; idx < tab->stop; idx++)
-		idx->addr = prel31_to_addr(&idx->addr);
-
 	spin_lock_irqsave(&unwind_lock, flags);
 	list_add_tail(&tab->list, &unwind_tables);
 	spin_unlock_irqrestore(&unwind_lock, flags);
@@ -437,16 +489,3 @@ void unwind_table_del(struct unwind_table *tab)
 
 	kfree(tab);
 }
-
-int __init unwind_init(void)
-{
-	struct unwind_idx *idx;
-
-	/* Convert the symbol addresses to absolute values */
-	for (idx = __start_unwind_idx; idx < __stop_unwind_idx; idx++)
-		idx->addr = prel31_to_addr(&idx->addr);
-
-	pr_debug("unwind: ARM stack unwinding initialised\n");
-
-	return 0;
-}
diff --git a/arch/arm/mach-exynos/mct.c b/arch/arm/mach-exynos/mct.c
index 97343df8f132..85b5527d0918 100644
--- a/arch/arm/mach-exynos/mct.c
+++ b/arch/arm/mach-exynos/mct.c
@@ -44,8 +44,6 @@ struct mct_clock_event_device {
 	char name[10];
 };
 
-static DEFINE_PER_CPU(struct mct_clock_event_device, percpu_mct_tick);
-
 static void exynos4_mct_write(unsigned int value, void *addr)
 {
 	void __iomem *stat_addr;
@@ -264,6 +262,9 @@ static void exynos4_clockevent_init(void)
 }
 
 #ifdef CONFIG_LOCAL_TIMERS
+
+static DEFINE_PER_CPU(struct mct_clock_event_device, percpu_mct_tick);
+
 /* Clock event handling */
 static void exynos4_mct_tick_stop(struct mct_clock_event_device *mevt)
 {
@@ -428,9 +429,13 @@ int __cpuinit local_timer_setup(struct clock_event_device *evt)
 
 void local_timer_stop(struct clock_event_device *evt)
 {
+	unsigned int cpu = smp_processor_id();
 	evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt);
 	if (mct_int_type == MCT_INT_SPI)
-		disable_irq(evt->irq);
+		if (cpu == 0)
+			remove_irq(evt->irq, &mct_tick0_event_irq);
+		else
+			remove_irq(evt->irq, &mct_tick1_event_irq);
 	else
 		disable_percpu_irq(IRQ_MCT_LOCALTIMER);
 }
@@ -443,6 +448,7 @@ static void __init exynos4_timer_resources(void)
 
 	clk_rate = clk_get_rate(mct_clk);
 
+#ifdef CONFIG_LOCAL_TIMERS
 	if (mct_int_type == MCT_INT_PPI) {
 		int err;
 
@@ -452,6 +458,7 @@ static void __init exynos4_timer_resources(void)
 		WARN(err, "MCT: can't request IRQ %d (%d)\n",
 		     IRQ_MCT_LOCALTIMER, err);
 	}
+#endif /* CONFIG_LOCAL_TIMERS */
 }
 
 static void __init exynos4_timer_init(void)
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index 5c837603ff0f..24994bb52147 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -362,7 +362,7 @@ static void __init mx51_babbage_init(void)
 {
 	iomux_v3_cfg_t usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
 	iomux_v3_cfg_t power_key = NEW_PAD_CTRL(MX51_PAD_EIM_A27__GPIO2_21,
-		PAD_CTL_SRE_FAST | PAD_CTL_DSE_HIGH | PAD_CTL_PUS_100K_UP);
+		PAD_CTL_SRE_FAST | PAD_CTL_DSE_HIGH);
 
 	imx51_soc_init();
 
diff --git a/arch/arm/mach-mx5/board-mx53_evk.c b/arch/arm/mach-mx5/board-mx53_evk.c
index 6bea31ab8f85..64bbfcea6f35 100644
--- a/arch/arm/mach-mx5/board-mx53_evk.c
+++ b/arch/arm/mach-mx5/board-mx53_evk.c
@@ -106,7 +106,7 @@ static inline void mx53_evk_fec_reset(void)
 	gpio_set_value(MX53_EVK_FEC_PHY_RST, 1);
 }
 
-static struct fec_platform_data mx53_evk_fec_pdata = {
+static const struct fec_platform_data mx53_evk_fec_pdata __initconst = {
 	.phy = PHY_INTERFACE_MODE_RMII,
 };
 
diff --git a/arch/arm/mach-mx5/board-mx53_loco.c b/arch/arm/mach-mx5/board-mx53_loco.c
index 7678f7734db6..237bdecd9331 100644
--- a/arch/arm/mach-mx5/board-mx53_loco.c
+++ b/arch/arm/mach-mx5/board-mx53_loco.c
@@ -242,7 +242,7 @@ static inline void mx53_loco_fec_reset(void)
 	gpio_set_value(LOCO_FEC_PHY_RST, 1);
 }
 
-static struct fec_platform_data mx53_loco_fec_data = {
+static const struct fec_platform_data mx53_loco_fec_data __initconst = {
 	.phy = PHY_INTERFACE_MODE_RMII,
 };
 
diff --git a/arch/arm/mach-mx5/board-mx53_smd.c b/arch/arm/mach-mx5/board-mx53_smd.c
index 59c0845eb4a6..d42132a80e8f 100644
--- a/arch/arm/mach-mx5/board-mx53_smd.c
+++ b/arch/arm/mach-mx5/board-mx53_smd.c
@@ -104,7 +104,7 @@ static inline void mx53_smd_fec_reset(void)
 	gpio_set_value(SMD_FEC_PHY_RST, 1);
 }
 
-static struct fec_platform_data mx53_smd_fec_data = {
+static const struct fec_platform_data mx53_smd_fec_data __initconst = {
 	.phy = PHY_INTERFACE_MODE_RMII,
 };
 
diff --git a/arch/arm/mach-s5pv210/mach-smdkv210.c b/arch/arm/mach-s5pv210/mach-smdkv210.c
index a9106c392398..8662ef6e5681 100644
--- a/arch/arm/mach-s5pv210/mach-smdkv210.c
+++ b/arch/arm/mach-s5pv210/mach-smdkv210.c
@@ -273,6 +273,7 @@ static struct samsung_bl_gpio_info smdkv210_bl_gpio_info = {
 
 static struct platform_pwm_backlight_data smdkv210_bl_data = {
 	.pwm_id = 3,
+	.pwm_period_ns = 1000,
 };
 
 static void __init smdkv210_map_io(void)
diff --git a/arch/arm/plat-mxc/cpufreq.c b/arch/arm/plat-mxc/cpufreq.c
index 74aac96cda20..adbff706ef6f 100644
--- a/arch/arm/plat-mxc/cpufreq.c
+++ b/arch/arm/plat-mxc/cpufreq.c
@@ -17,6 +17,7 @@
  * the CPU clock speed on the fly.
  */
 
+#include <linux/module.h>
 #include <linux/cpufreq.h>
 #include <linux/clk.h>
 #include <linux/err.h>
diff --git a/arch/arm/plat-mxc/pwm.c b/arch/arm/plat-mxc/pwm.c
index 42d74ea59084..845de59f07ed 100644
--- a/arch/arm/plat-mxc/pwm.c
+++ b/arch/arm/plat-mxc/pwm.c
@@ -32,6 +32,9 @@
 #define MX3_PWMSAR                0x0C    /* PWM Sample Register */
 #define MX3_PWMPR                 0x10    /* PWM Period Register */
 #define MX3_PWMCR_PRESCALER(x)    (((x - 1) & 0xFFF) << 4)
+#define MX3_PWMCR_DOZEEN                (1 << 24)
+#define MX3_PWMCR_WAITEN                (1 << 23)
+#define MX3_PWMCR_DBGEN			(1 << 22)
 #define MX3_PWMCR_CLKSRC_IPG_HIGH (2 << 16)
 #define MX3_PWMCR_CLKSRC_IPG      (1 << 16)
 #define MX3_PWMCR_EN              (1 << 0)
@@ -77,7 +80,9 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
 		writel(duty_cycles, pwm->mmio_base + MX3_PWMSAR);
 		writel(period_cycles, pwm->mmio_base + MX3_PWMPR);
 
-		cr = MX3_PWMCR_PRESCALER(prescale) | MX3_PWMCR_EN;
+		cr = MX3_PWMCR_PRESCALER(prescale) |
+			MX3_PWMCR_DOZEEN | MX3_PWMCR_WAITEN |
+			MX3_PWMCR_DBGEN | MX3_PWMCR_EN;
 
 		if (cpu_is_mx25())
 			cr |= MX3_PWMCR_CLKSRC_IPG;
diff --git a/arch/arm/plat-samsung/dev-backlight.c b/arch/arm/plat-samsung/dev-backlight.c
index e657305644cc..a976c023b286 100644
--- a/arch/arm/plat-samsung/dev-backlight.c
+++ b/arch/arm/plat-samsung/dev-backlight.c
@@ -15,7 +15,6 @@
 #include <linux/slab.h>
 #include <linux/io.h>
 #include <linux/pwm_backlight.h>
-#include <linux/slab.h>
 
 #include <plat/devs.h>
 #include <plat/gpio-cfg.h>
diff --git a/arch/sparc/kernel/ds.c b/arch/sparc/kernel/ds.c
index 7429b47c3aca..381edcd5bc29 100644
--- a/arch/sparc/kernel/ds.c
+++ b/arch/sparc/kernel/ds.c
@@ -1181,13 +1181,11 @@ static int __devinit ds_probe(struct vio_dev *vdev,
 
 	dp->rcv_buf_len = 4096;
 
-	dp->ds_states = kzalloc(sizeof(ds_states_template),
-				GFP_KERNEL);
+	dp->ds_states = kmemdup(ds_states_template,
+				sizeof(ds_states_template), GFP_KERNEL);
 	if (!dp->ds_states)
 		goto out_free_rcv_buf;
 
-	memcpy(dp->ds_states, ds_states_template,
-	       sizeof(ds_states_template));
 	dp->num_ds_states = ARRAY_SIZE(ds_states_template);
 
 	for (i = 0; i < dp->num_ds_states; i++)
diff --git a/arch/sparc/kernel/prom_common.c b/arch/sparc/kernel/prom_common.c
index 46614807a57f..741df916c124 100644
--- a/arch/sparc/kernel/prom_common.c
+++ b/arch/sparc/kernel/prom_common.c
@@ -58,12 +58,10 @@ int of_set_property(struct device_node *dp, const char *name, void *val, int len
 	void *new_val;
 	int err;
 
-	new_val = kmalloc(len, GFP_KERNEL);
+	new_val = kmemdup(val, len, GFP_KERNEL);
 	if (!new_val)
 		return -ENOMEM;
 
-	memcpy(new_val, val, len);
-
 	err = -ENODEV;
 
 	mutex_lock(&of_set_property_mutex);
diff --git a/arch/sparc/mm/btfixup.c b/arch/sparc/mm/btfixup.c
index 5175ac2f4820..8a7f81743c12 100644
--- a/arch/sparc/mm/btfixup.c
+++ b/arch/sparc/mm/btfixup.c
@@ -302,8 +302,7 @@ void __init btfixup(void)
 				case 'i':	/* INT */
 					if ((insn & 0xc1c00000) == 0x01000000) /* %HI */
 						set_addr(addr, q[1], fmangled, (insn & 0xffc00000) | (p[1] >> 10));
-					else if ((insn & 0x80002000) == 0x80002000 &&
-					         (insn & 0x01800000) != 0x01800000) /* %LO */
+					else if ((insn & 0x80002000) == 0x80002000) /* %LO */
 						set_addr(addr, q[1], fmangled, (insn & 0xffffe000) | (p[1] & 0x3ff));
 					else {
 						prom_printf(insn_i, p, addr, insn);
diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h
index c9547033e38e..908b96957d88 100644
--- a/arch/x86/include/asm/e820.h
+++ b/arch/x86/include/asm/e820.h
@@ -53,13 +53,6 @@
  */
 #define E820_RESERVED_KERN        128
 
-/*
- * Address ranges that need to be mapped by the kernel direct
- * mapping. This is used to make sure regions such as
- * EFI_RUNTIME_SERVICES_DATA are directly mapped. See setup_arch().
- */
-#define E820_RESERVED_EFI         129
-
 #ifndef __ASSEMBLY__
 #include <linux/types.h>
 struct e820entry {
@@ -122,7 +115,6 @@ static inline void early_memtest(unsigned long start, unsigned long end)
 }
 #endif
 
-extern unsigned long e820_end_pfn(unsigned long limit_pfn, unsigned type);
 extern unsigned long e820_end_of_ram_pfn(void);
 extern unsigned long e820_end_of_low_ram_pfn(void);
 extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index b8d8bfcd44a9..7093e4a6a0bc 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -33,6 +33,8 @@ extern unsigned long asmlinkage efi_call_phys(void *, ...);
 #define efi_call_virt6(f, a1, a2, a3, a4, a5, a6)	\
 	efi_call_virt(f, a1, a2, a3, a4, a5, a6)
 
+#define efi_ioremap(addr, size, type)		ioremap_cache(addr, size)
+
 #else /* !CONFIG_X86_32 */
 
 extern u64 efi_call0(void *fp);
@@ -82,6 +84,9 @@ extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
 	efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
 		  (u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
 
+extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
+				 u32 type);
+
 #endif /* CONFIG_X86_32 */
 
 extern int add_efi_memmap;
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 65ffd110a81b..303a0e48f076 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -135,7 +135,6 @@ static void __init e820_print_type(u32 type)
 		printk(KERN_CONT "(usable)");
 		break;
 	case E820_RESERVED:
-	case E820_RESERVED_EFI:
 		printk(KERN_CONT "(reserved)");
 		break;
 	case E820_ACPI:
@@ -784,7 +783,7 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
 /*
  * Find the highest page frame number we have available
  */
-unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
+static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
 {
 	int i;
 	unsigned long last_pfn = 0;
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 9a9e40fb091c..cf0ef986cb6d 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -691,8 +691,6 @@ early_param("reservelow", parse_reservelow);
 
 void __init setup_arch(char **cmdline_p)
 {
-	unsigned long end_pfn;
-
 #ifdef CONFIG_X86_32
 	memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
 	visws_early_detect();
@@ -934,24 +932,7 @@ void __init setup_arch(char **cmdline_p)
 	init_gbpages();
 
 	/* max_pfn_mapped is updated here */
-	end_pfn = max_low_pfn;
-
-#ifdef CONFIG_X86_64
-	/*
-	 * There may be regions after the last E820_RAM region that we
-	 * want to include in the kernel direct mapping, such as
-	 * EFI_RUNTIME_SERVICES_DATA.
-	 */
-	if (efi_enabled) {
-		unsigned long efi_end;
-
-		efi_end = e820_end_pfn(MAXMEM>>PAGE_SHIFT, E820_RESERVED_EFI);
-		if (efi_end > max_low_pfn)
-			end_pfn = efi_end;
-	}
-#endif
-
-	max_low_pfn_mapped = init_memory_mapping(0, end_pfn << PAGE_SHIFT);
+	max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
 	max_pfn_mapped = max_low_pfn_mapped;
 
 #ifdef CONFIG_X86_64
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index c9718a16be15..37718f0f053d 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -323,13 +323,10 @@ static void __init do_add_efi_memmap(void)
 		case EFI_UNUSABLE_MEMORY:
 			e820_type = E820_UNUSABLE;
 			break;
-		case EFI_RUNTIME_SERVICES_DATA:
-			e820_type = E820_RESERVED_EFI;
-			break;
 		default:
 			/*
 			 * EFI_RESERVED_TYPE EFI_RUNTIME_SERVICES_CODE
-			 * EFI_MEMORY_MAPPED_IO
+			 * EFI_RUNTIME_SERVICES_DATA EFI_MEMORY_MAPPED_IO
 			 * EFI_MEMORY_MAPPED_IO_PORT_SPACE EFI_PAL_CODE
 			 */
 			e820_type = E820_RESERVED;
@@ -674,21 +671,10 @@ void __init efi_enter_virtual_mode(void)
 		end_pfn = PFN_UP(end);
 		if (end_pfn <= max_low_pfn_mapped
 		    || (end_pfn > (1UL << (32 - PAGE_SHIFT))
-			&& end_pfn <= max_pfn_mapped)) {
+			&& end_pfn <= max_pfn_mapped))
 			va = __va(md->phys_addr);
-
-			if (!(md->attribute & EFI_MEMORY_WB)) {
-				addr = (u64) (unsigned long)va;
-				npages = md->num_pages;
-				memrange_efi_to_native(&addr, &npages);
-				set_memory_uc(addr, npages);
-			}
-		} else {
-			if (!(md->attribute & EFI_MEMORY_WB))
-				va = ioremap_nocache(md->phys_addr, size);
-			else
-				va = ioremap_cache(md->phys_addr, size);
-		}
+		else
+			va = efi_ioremap(md->phys_addr, size, md->type);
 
 		md->virt_addr = (u64) (unsigned long) va;
 
@@ -698,6 +684,13 @@ void __init efi_enter_virtual_mode(void)
 			continue;
 		}
 
+		if (!(md->attribute & EFI_MEMORY_WB)) {
+			addr = md->virt_addr;
+			npages = md->num_pages;
+			memrange_efi_to_native(&addr, &npages);
+			set_memory_uc(addr, npages);
+		}
+
 		systab = (u64) (unsigned long) efi_phys.systab;
 		if (md->phys_addr <= systab && systab < end) {
 			systab += md->virt_addr - md->phys_addr;
diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c
index e36bf714cb77..40e446941dd7 100644
--- a/arch/x86/platform/efi/efi_32.c
+++ b/arch/x86/platform/efi/efi_32.c
@@ -39,43 +39,14 @@
  */
 
 static unsigned long efi_rt_eflags;
-static pgd_t efi_bak_pg_dir_pointer[2];
 
 void efi_call_phys_prelog(void)
 {
-	unsigned long cr4;
-	unsigned long temp;
 	struct desc_ptr gdt_descr;
 
 	local_irq_save(efi_rt_eflags);
 
-	/*
-	 * If I don't have PAE, I should just duplicate two entries in page
-	 * directory. If I have PAE, I just need to duplicate one entry in
-	 * page directory.
-	 */
-	cr4 = read_cr4_safe();
-
-	if (cr4 & X86_CR4_PAE) {
-		efi_bak_pg_dir_pointer[0].pgd =
-		    swapper_pg_dir[pgd_index(0)].pgd;
-		swapper_pg_dir[0].pgd =
-		    swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
-	} else {
-		efi_bak_pg_dir_pointer[0].pgd =
-		    swapper_pg_dir[pgd_index(0)].pgd;
-		efi_bak_pg_dir_pointer[1].pgd =
-		    swapper_pg_dir[pgd_index(0x400000)].pgd;
-		swapper_pg_dir[pgd_index(0)].pgd =
-		    swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
-		temp = PAGE_OFFSET + 0x400000;
-		swapper_pg_dir[pgd_index(0x400000)].pgd =
-		    swapper_pg_dir[pgd_index(temp)].pgd;
-	}
-
-	/*
-	 * After the lock is released, the original page table is restored.
-	 */
+	load_cr3(initial_page_table);
 	__flush_tlb_all();
 
 	gdt_descr.address = __pa(get_cpu_gdt_table(0));
@@ -85,28 +56,13 @@ void efi_call_phys_prelog(void)
 
 void efi_call_phys_epilog(void)
 {
-	unsigned long cr4;
 	struct desc_ptr gdt_descr;
 
 	gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
 	gdt_descr.size = GDT_SIZE - 1;
 	load_gdt(&gdt_descr);
 
-	cr4 = read_cr4_safe();
-
-	if (cr4 & X86_CR4_PAE) {
-		swapper_pg_dir[pgd_index(0)].pgd =
-		    efi_bak_pg_dir_pointer[0].pgd;
-	} else {
-		swapper_pg_dir[pgd_index(0)].pgd =
-		    efi_bak_pg_dir_pointer[0].pgd;
-		swapper_pg_dir[pgd_index(0x400000)].pgd =
-		    efi_bak_pg_dir_pointer[1].pgd;
-	}
-
-	/*
-	 * After the lock is released, the original page table is restored.
-	 */
+	load_cr3(swapper_pg_dir);
 	__flush_tlb_all();
 
 	local_irq_restore(efi_rt_eflags);
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index 312250c6b2de..ac3aa54e2654 100644
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -80,3 +80,20 @@ void __init efi_call_phys_epilog(void)
 	local_irq_restore(efi_flags);
 	early_code_mapping_set_exec(0);
 }
+
+void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size,
+				 u32 type)
+{
+	unsigned long last_map_pfn;
+
+	if (type == EFI_MEMORY_MAPPED_IO)
+		return ioremap(phys_addr, size);
+
+	last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size);
+	if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) {
+		unsigned long top = last_map_pfn << PAGE_SHIFT;
+		efi_ioremap(top, size - (top - phys_addr), type);
+	}
+
+	return (void __iomem *)__va(phys_addr);
+}
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 1093f80c162d..b2c7179fa263 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -173,9 +173,21 @@ static unsigned long __init xen_get_max_pages(void)
 	domid_t domid = DOMID_SELF;
 	int ret;
 
-	ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid);
-	if (ret > 0)
-		max_pages = ret;
+	/*
+	 * For the initial domain we use the maximum reservation as
+	 * the maximum page.
+	 *
+	 * For guest domains the current maximum reservation reflects
+	 * the current maximum rather than the static maximum. In this
+	 * case the e820 map provided to us will cover the static
+	 * maximum region.
+	 */
+	if (xen_initial_domain()) {
+		ret = HYPERVISOR_memory_op(XENMEM_maximum_reservation, &domid);
+		if (ret > 0)
+			max_pages = ret;
+	}
+
 	return min(max_pages, MAX_DOMAIN_PAGES);
 }