Merge branches 'fixes' and 'misc' into for-linus

arch/arm/Kconfig

@@ -258,6 +258,7 @@ config ARCH_INTEGRATOR
 	select ARCH_HAS_CPUFREQ
 	select CLKDEV_LOOKUP
 	select HAVE_MACH_CLKDEV
+	select HAVE_TCM
 	select ICST
 	select GENERIC_CLOCKEVENTS
 	select PLAT_VERSATILE
@@ -1126,6 +1127,11 @@ config ARM_TIMER_SP804
 
 source arch/arm/mm/Kconfig
 
+config ARM_NR_BANKS
+	int
+	default 16 if ARCH_EP93XX
+	default 8
+
 config IWMMXT
 	bool "Enable iWMMXt support"
 	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
@@ -1560,6 +1566,16 @@ config LOCAL_TIMERS
 	  accounting to be spread across the timer interval, preventing a
 	  "thundering herd" at every timer tick.
 
+config ARCH_NR_GPIO
+	int
+	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
+	default 350 if ARCH_U8500
+	default 0
+	help
+	  Maximum number of GPIOs in the system.
+
+	  If unsure, leave the default value.
+
 source kernel/Kconfig.preempt
 
 config HZ

arch/arm/common/timer-sp.c

@@ -143,7 +143,6 @@ static int sp804_set_next_event(unsigned long next,
 }
 
 static struct clock_event_device sp804_clockevent = {
-	.shift		= 32,
 	.features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
 	.set_mode	= sp804_set_mode,
 	.set_next_event	= sp804_set_next_event,
@@ -169,13 +168,9 @@ void __init sp804_clockevents_init(void __iomem *base, unsigned int irq,
 
 	clkevt_base = base;
 	clkevt_reload = DIV_ROUND_CLOSEST(rate, HZ);
-
 	evt->name = name;
 	evt->irq = irq;
-	evt->mult = div_sc(rate, NSEC_PER_SEC, evt->shift);
-	evt->max_delta_ns = clockevent_delta2ns(0xffffffff, evt);
-	evt->min_delta_ns = clockevent_delta2ns(0xf, evt);
 
 	setup_irq(irq, &sp804_timer_irq);
-	clockevents_register_device(evt);
+	clockevents_config_and_register(evt, rate, 0xf, 0xffffffff);
 }

arch/arm/include/asm/edac.h

+/*
+ * Copyright 2011 Calxeda, Inc.
+ * Based on PPC version Copyright 2007 MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef ASM_EDAC_H
+#define ASM_EDAC_H
+/*
+ * ECC atomic, DMA, SMP and interrupt safe scrub function.
+ * Implements the per arch atomic_scrub() that EDAC use for software
+ * ECC scrubbing.  It reads memory and then writes back the original
+ * value, allowing the hardware to detect and correct memory errors.
+ */
+static inline void atomic_scrub(void *va, u32 size)
+{
+#if __LINUX_ARM_ARCH__ >= 6
+	unsigned int *virt_addr = va;
+	unsigned int temp, temp2;
+	unsigned int i;
+
+	for (i = 0; i < size / sizeof(*virt_addr); i++, virt_addr++) {
+		/* Very carefully read and write to memory atomically
+		 * so we are interrupt, DMA and SMP safe.
+		 */
+		__asm__ __volatile__("\n"
+			"1:	ldrex	%0, [%2]\n"
+			"	strex	%1, %0, [%2]\n"
+			"	teq	%1, #0\n"
+			"	bne	1b\n"
+			: "=&r"(temp), "=&r"(temp2)
+			: "r"(virt_addr)
+			: "cc");
+	}
+#endif
+}
+
+#endif

arch/arm/include/asm/gpio.h

 #ifndef _ARCH_ARM_GPIO_H
 #define _ARCH_ARM_GPIO_H
 
+#if CONFIG_ARCH_NR_GPIO > 0
+#define ARCH_NR_GPIO CONFIG_ARCH_NR_GPIO
+#endif
+
 /* not all ARM platforms necessarily support this API ... */
 #include <mach/gpio.h>
 

arch/arm/include/asm/hardirq.h

@@ -27,23 +27,6 @@ u64 smp_irq_stat_cpu(unsigned int cpu);
 
 #define arch_irq_stat_cpu	smp_irq_stat_cpu
 
-#if NR_IRQS > 512
-#define HARDIRQ_BITS	10
-#elif NR_IRQS > 256
-#define HARDIRQ_BITS	9
-#else
-#define HARDIRQ_BITS	8
-#endif
-
-/*
- * The hardirq mask has to be large enough to have space
- * for potentially all IRQ sources in the system nesting
- * on a single CPU:
- */
-#if (1 << HARDIRQ_BITS) < NR_IRQS
-# error HARDIRQ_BITS is too low!
-#endif
-
 #define __ARCH_IRQ_EXIT_IRQS_DISABLED	1
 
 #endif /* __ASM_HARDIRQ_H */

arch/arm/include/asm/opcodes.h

+/*
+ *  arch/arm/include/asm/opcodes.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_ARM_OPCODES_H
+#define __ASM_ARM_OPCODES_H
+
+#ifndef __ASSEMBLY__
+extern asmlinkage unsigned int arm_check_condition(u32 opcode, u32 psr);
+#endif
+
+#define ARM_OPCODE_CONDTEST_FAIL   0
+#define ARM_OPCODE_CONDTEST_PASS   1
+#define ARM_OPCODE_CONDTEST_UNCOND 2
+
+#endif /* __ASM_ARM_OPCODES_H */

arch/arm/include/asm/pgtable.h

@@ -336,6 +336,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
  * We provide our own arch_get_unmapped_area to cope with VIPT caches.
  */
 #define HAVE_ARCH_UNMAPPED_AREA
+#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
 
 /*
  * remap a physical page `pfn' of size `size' with page protection `prot'

arch/arm/include/asm/processor.h

@@ -123,6 +123,8 @@ static inline void prefetch(const void *ptr)
 
 #endif
 
+#define HAVE_ARCH_PICK_MMAP_LAYOUT
+
 #endif
 
 #endif /* __ASM_ARM_PROCESSOR_H */

arch/arm/include/asm/setup.h

@@ -192,11 +192,7 @@ static const struct tagtable __tagtable_##fn __tag = { tag, fn }
 /*
  * Memory map description
  */
-#ifdef CONFIG_ARCH_EP93XX
-# define NR_BANKS 16
-#else
-# define NR_BANKS 8
-#endif
+#define NR_BANKS	CONFIG_ARM_NR_BANKS
 
 struct membank {
 	phys_addr_t start;

arch/arm/include/asm/swab.h

@@ -24,12 +24,13 @@
 
 #if defined(__KERNEL__) && __LINUX_ARM_ARCH__ >= 6
 
-static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
+static inline __attribute_const__ __u32 __arch_swahb32(__u32 x)
 {
 	__asm__ ("rev16 %0, %1" : "=r" (x) : "r" (x));
 	return x;
 }
-#define __arch_swab16 __arch_swab16
+#define __arch_swahb32 __arch_swahb32
+#define __arch_swab16(x) ((__u16)__arch_swahb32(x))
 
 static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
 {

arch/arm/kernel/Makefile

@@ -13,7 +13,7 @@ CFLAGS_REMOVE_return_address.o = -pg
 
 # Object file lists.
 
-obj-y		:= elf.o entry-armv.o entry-common.o irq.o \
+obj-y		:= elf.o entry-armv.o entry-common.o irq.o opcodes.o \
 		   process.o ptrace.o return_address.o setup.o signal.o \
 		   sys_arm.o stacktrace.o time.o traps.o
 

arch/arm/kernel/kprobes-test.c

@@ -202,6 +202,8 @@
 #include <linux/slab.h>
 #include <linux/kprobes.h>
 
+#include <asm/opcodes.h>
+
 #include "kprobes.h"
 #include "kprobes-test.h"
 
@@ -1050,65 +1052,9 @@ static int test_instance;
 
 static unsigned long test_check_cc(int cc, unsigned long cpsr)
 {
-	unsigned long temp;
-
-	switch (cc) {
-	case 0x0: /* eq */
-		return cpsr & PSR_Z_BIT;
-
-	case 0x1: /* ne */
-		return (~cpsr) & PSR_Z_BIT;
-
-	case 0x2: /* cs */
-		return cpsr & PSR_C_BIT;
-
-	case 0x3: /* cc */
-		return (~cpsr) & PSR_C_BIT;
-
-	case 0x4: /* mi */
-		return cpsr & PSR_N_BIT;
-
-	case 0x5: /* pl */
-		return (~cpsr) & PSR_N_BIT;
-
-	case 0x6: /* vs */
-		return cpsr & PSR_V_BIT;
-
-	case 0x7: /* vc */
-		return (~cpsr) & PSR_V_BIT;
+	int ret = arm_check_condition(cc << 28, cpsr);
 
-	case 0x8: /* hi */
-		cpsr &= ~(cpsr >> 1); /* PSR_C_BIT &= ~PSR_Z_BIT */
-		return cpsr & PSR_C_BIT;
-
-	case 0x9: /* ls */
-		cpsr &= ~(cpsr >> 1); /* PSR_C_BIT &= ~PSR_Z_BIT */
-		return (~cpsr) & PSR_C_BIT;
-
-	case 0xa: /* ge */
-		cpsr ^= (cpsr << 3); /* PSR_N_BIT ^= PSR_V_BIT */
-		return (~cpsr) & PSR_N_BIT;
-
-	case 0xb: /* lt */
-		cpsr ^= (cpsr << 3); /* PSR_N_BIT ^= PSR_V_BIT */
-		return cpsr & PSR_N_BIT;
-
-	case 0xc: /* gt */
-		temp = cpsr ^ (cpsr << 3); /* PSR_N_BIT ^= PSR_V_BIT */
-		temp |= (cpsr << 1);	   /* PSR_N_BIT |= PSR_Z_BIT */
-		return (~temp) & PSR_N_BIT;
-
-	case 0xd: /* le */
-		temp = cpsr ^ (cpsr << 3); /* PSR_N_BIT ^= PSR_V_BIT */
-		temp |= (cpsr << 1);	   /* PSR_N_BIT |= PSR_Z_BIT */
-		return temp & PSR_N_BIT;
-
-	case 0xe: /* al */
-	case 0xf: /* unconditional */
-		return true;
-	}
-	BUG();
-	return false;
+	return (ret != ARM_OPCODE_CONDTEST_FAIL);
 }
 
 static int is_last_scenario;
@@ -1128,7 +1074,9 @@ static unsigned long test_context_cpsr(int scenario)
 
 	if (!test_case_is_thumb) {
 		/* Testing ARM code */
-		probe_should_run = test_check_cc(current_instruction >> 28, cpsr) != 0;
+		int cc = current_instruction >> 28;
+
+		probe_should_run = test_check_cc(cc, cpsr) != 0;
 		if (scenario == 15)
 			is_last_scenario = true;
 

arch/arm/kernel/opcodes.c

+/*
+ *  linux/arch/arm/kernel/opcodes.c
+ *
+ *  A32 condition code lookup feature moved from nwfpe/fpopcode.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <asm/opcodes.h>
+
+#define ARM_OPCODE_CONDITION_UNCOND 0xf
+
+/*
+ * condition code lookup table
+ * index into the table is test code: EQ, NE, ... LT, GT, AL, NV
+ *
+ * bit position in short is condition code: NZCV
+ */
+static const unsigned short cc_map[16] = {
+	0xF0F0,			/* EQ == Z set            */
+	0x0F0F,			/* NE                     */
+	0xCCCC,			/* CS == C set            */
+	0x3333,			/* CC                     */
+	0xFF00,			/* MI == N set            */
+	0x00FF,			/* PL                     */
+	0xAAAA,			/* VS == V set            */
+	0x5555,			/* VC                     */
+	0x0C0C,			/* HI == C set && Z clear */
+	0xF3F3,			/* LS == C clear || Z set */
+	0xAA55,			/* GE == (N==V)           */
+	0x55AA,			/* LT == (N!=V)           */
+	0x0A05,			/* GT == (!Z && (N==V))   */
+	0xF5FA,			/* LE == (Z || (N!=V))    */
+	0xFFFF,			/* AL always              */
+	0			/* NV                     */
+};
+
+/*
+ * Returns:
+ * ARM_OPCODE_CONDTEST_FAIL   - if condition fails
+ * ARM_OPCODE_CONDTEST_PASS   - if condition passes (including AL)
+ * ARM_OPCODE_CONDTEST_UNCOND - if NV condition, or separate unconditional
+ *                              opcode space from v5 onwards
+ *
+ * Code that tests whether a conditional instruction would pass its condition
+ * check should check that return value == ARM_OPCODE_CONDTEST_PASS.
+ *
+ * Code that tests if a condition means that the instruction would be executed
+ * (regardless of conditional or unconditional) should instead check that the
+ * return value != ARM_OPCODE_CONDTEST_FAIL.
+ */
+asmlinkage unsigned int arm_check_condition(u32 opcode, u32 psr)
+{
+	u32 cc_bits  = opcode >> 28;
+	u32 psr_cond = psr >> 28;
+	unsigned int ret;
+
+	if (cc_bits != ARM_OPCODE_CONDITION_UNCOND) {
+		if ((cc_map[cc_bits] >> (psr_cond)) & 1)
+			ret = ARM_OPCODE_CONDTEST_PASS;
+		else
+			ret = ARM_OPCODE_CONDTEST_FAIL;
+	} else {
+		ret = ARM_OPCODE_CONDTEST_UNCOND;
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(arm_check_condition);

arch/arm/kernel/smp_twd.c

@@ -10,8 +10,11 @@
  */
 #include <linux/init.h>
 #include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/cpufreq.h>
 #include <linux/delay.h>
 #include <linux/device.h>
+#include <linux/err.h>
 #include <linux/smp.h>
 #include <linux/jiffies.h>
 #include <linux/clockchips.h>
@@ -25,6 +28,7 @@
 /* set up by the platform code */
 void __iomem *twd_base;
 
+static struct clk *twd_clk;
 static unsigned long twd_timer_rate;
 
 static struct clock_event_device __percpu **twd_evt;
@@ -89,6 +93,52 @@ void twd_timer_stop(struct clock_event_device *clk)
 	disable_percpu_irq(clk->irq);
 }
 
+#ifdef CONFIG_CPU_FREQ
+
+/*
+ * Updates clockevent frequency when the cpu frequency changes.
+ * Called on the cpu that is changing frequency with interrupts disabled.
+ */
+static void twd_update_frequency(void *data)
+{
+	twd_timer_rate = clk_get_rate(twd_clk);
+
+	clockevents_update_freq(*__this_cpu_ptr(twd_evt), twd_timer_rate);
+}
+
+static int twd_cpufreq_transition(struct notifier_block *nb,
+	unsigned long state, void *data)
+{
+	struct cpufreq_freqs *freqs = data;
+
+	/*
+	 * The twd clock events must be reprogrammed to account for the new
+	 * frequency.  The timer is local to a cpu, so cross-call to the
+	 * changing cpu.
+	 */
+	if (state == CPUFREQ_POSTCHANGE || state == CPUFREQ_RESUMECHANGE)
+		smp_call_function_single(freqs->cpu, twd_update_frequency,
+			NULL, 1);
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block twd_cpufreq_nb = {
+	.notifier_call = twd_cpufreq_transition,
+};
+
+static int twd_cpufreq_init(void)
+{
+	if (!IS_ERR(twd_clk))
+		return cpufreq_register_notifier(&twd_cpufreq_nb,
+			CPUFREQ_TRANSITION_NOTIFIER);
+
+	return 0;
+}
+core_initcall(twd_cpufreq_init);
+
+#endif
+
 static void __cpuinit twd_calibrate_rate(void)
 {
 	unsigned long count;
@@ -140,6 +190,35 @@ static irqreturn_t twd_handler(int irq, void *dev_id)
 	return IRQ_NONE;
 }
 
+static struct clk *twd_get_clock(void)
+{
+	struct clk *clk;
+	int err;
+
+	clk = clk_get_sys("smp_twd", NULL);
+	if (IS_ERR(clk)) {
+		pr_err("smp_twd: clock not found: %d\n", (int)PTR_ERR(clk));
+		return clk;
+	}
+
+	err = clk_prepare(clk);
+	if (err) {
+		pr_err("smp_twd: clock failed to prepare: %d\n", err);
+		clk_put(clk);
+		return ERR_PTR(err);
+	}
+
+	err = clk_enable(clk);
+	if (err) {
+		pr_err("smp_twd: clock failed to enable: %d\n", err);
+		clk_unprepare(clk);
+		clk_put(clk);
+		return ERR_PTR(err);
+	}
+
+	return clk;
+}
+
 /*
  * Setup the local clock events for a CPU.
  */
@@ -165,7 +244,13 @@ void __cpuinit twd_timer_setup(struct clock_event_device *clk)
 		}
 	}
 
-	twd_calibrate_rate();
+	if (!twd_clk)
+		twd_clk = twd_get_clock();
+
+	if (!IS_ERR_OR_NULL(twd_clk))
+		twd_timer_rate = clk_get_rate(twd_clk);
+	else
+		twd_calibrate_rate();
 
 	clk->name = "local_timer";
 	clk->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
@@ -173,15 +258,11 @@ void __cpuinit twd_timer_setup(struct clock_event_device *clk)
 	clk->rating = 350;
 	clk->set_mode = twd_set_mode;
 	clk->set_next_event = twd_set_next_event;
-	clk->shift = 20;
-	clk->mult = div_sc(twd_timer_rate, NSEC_PER_SEC, clk->shift);
-	clk->max_delta_ns = clockevent_delta2ns(0xffffffff, clk);
-	clk->min_delta_ns = clockevent_delta2ns(0xf, clk);
 
 	this_cpu_clk = __this_cpu_ptr(twd_evt);
 	*this_cpu_clk = clk;
 
-	clockevents_register_device(clk);
-
+	clockevents_config_and_register(clk, twd_timer_rate,
+					0xf, 0xffffffff);
 	enable_percpu_irq(clk->irq, 0);
 }

arch/arm/kernel/swp_emulate.c

@@ -25,6 +25,7 @@
 #include <linux/syscalls.h>
 #include <linux/perf_event.h>
 
+#include <asm/opcodes.h>
 #include <asm/traps.h>
 #include <asm/uaccess.h>
 
@@ -185,6 +186,21 @@ static int swp_handler(struct pt_regs *regs, unsigned int instr)
 
 	perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, regs->ARM_pc);
 
+	res = arm_check_condition(instr, regs->ARM_cpsr);
+	switch (res) {
+	case ARM_OPCODE_CONDTEST_PASS:
+		break;
+	case ARM_OPCODE_CONDTEST_FAIL:
+		/* Condition failed - return to next instruction */
+		regs->ARM_pc += 4;
+		return 0;
+	case ARM_OPCODE_CONDTEST_UNCOND:
+		/* If unconditional encoding - not a SWP, undef */
+		return -EFAULT;
+	default:
+		return -EINVAL;
+	}
+
 	if (current->pid != previous_pid) {
 		pr_debug("\"%s\" (%ld) uses deprecated SWP{B} instruction\n",
 			 current->comm, (unsigned long)current->pid);

arch/arm/kernel/tcm.c

@@ -180,9 +180,9 @@ static int __init setup_tcm_bank(u8 type, u8 bank, u8 banks,
  */
 void __init tcm_init(void)
 {
-	u32 tcm_status = read_cpuid_tcmstatus();
-	u8 dtcm_banks = (tcm_status >> 16) & 0x03;
-	u8 itcm_banks = (tcm_status & 0x03);
+	u32 tcm_status;
+	u8 dtcm_banks;
+	u8 itcm_banks;
 	size_t dtcm_code_sz = &__edtcm_data - &__sdtcm_data;
 	size_t itcm_code_sz = &__eitcm_text - &__sitcm_text;
 	char *start;
@@ -191,6 +191,22 @@ void __init tcm_init(void)
 	int ret;
 	int i;
 
+	/*
+	 * Prior to ARMv5 there is no TCM, and trying to read the status
+	 * register will hang the processor.
+	 */
+	if (cpu_architecture() < CPU_ARCH_ARMv5) {
+		if (dtcm_code_sz || itcm_code_sz)
+			pr_info("CPU TCM: %u bytes of DTCM and %u bytes of "
+				"ITCM code compiled in, but no TCM present "
+				"in pre-v5 CPU\n", dtcm_code_sz, itcm_code_sz);
+		return;
+	}
+
+	tcm_status = read_cpuid_tcmstatus();
+	dtcm_banks = (tcm_status >> 16) & 0x03;
+	itcm_banks = (tcm_status & 0x03);
+
 	/* Values greater than 2 for D/ITCM banks are "reserved" */
 	if (dtcm_banks > 2)
 		dtcm_banks = 0;

arch/arm/mach-integrator/Kconfig

@@ -6,6 +6,8 @@ config ARCH_INTEGRATOR_AP
 	bool "Support Integrator/AP and Integrator/PP2 platforms"
 	select CLKSRC_MMIO
 	select MIGHT_HAVE_PCI
+	select SERIAL_AMBA_PL010
+	select SERIAL_AMBA_PL010_CONSOLE
 	help
 	  Include support for the ARM(R) Integrator/AP and
 	  Integrator/PP2 platforms.
@@ -15,6 +17,8 @@ config ARCH_INTEGRATOR_CP
 	select ARCH_CINTEGRATOR
 	select ARM_TIMER_SP804
 	select PLAT_VERSATILE_CLCD
+	select SERIAL_AMBA_PL011
+	select SERIAL_AMBA_PL011_CONSOLE
 	help
 	  Include support for the ARM(R) Integrator CP platform.
 

arch/arm/mach-integrator/core.c

@@ -29,6 +29,7 @@
 #include <mach/cm.h>
 #include <asm/system.h>
 #include <asm/leds.h>
+#include <asm/mach-types.h>
 #include <asm/mach/time.h>
 #include <asm/pgtable.h>
 
@@ -44,7 +45,6 @@ static struct amba_device rtc_device = {
 		.flags	= IORESOURCE_MEM,
 	},
 	.irq		= { IRQ_RTCINT, NO_IRQ },
-	.periphid	= 0x00041030,
 };
 
 static struct amba_device uart0_device = {
@@ -58,7 +58,6 @@ static struct amba_device uart0_device = {
 		.flags	= IORESOURCE_MEM,
 	},
 	.irq		= { IRQ_UARTINT0, NO_IRQ },
-	.periphid	= 0x0041010,
 };
 
 static struct amba_device uart1_device = {
@@ -72,7 +71,6 @@ static struct amba_device uart1_device = {
 		.flags	= IORESOURCE_MEM,
 	},
 	.irq		= { IRQ_UARTINT1, NO_IRQ },
-	.periphid	= 0x0041010,
 };
 
 static struct amba_device kmi0_device = {
@@ -85,7 +83,6 @@ static struct amba_device kmi0_device = {
 		.flags	= IORESOURCE_MEM,
 	},
 	.irq		= { IRQ_KMIINT0, NO_IRQ },
-	.periphid	= 0x00041050,
 };
 
 static struct amba_device kmi1_device = {
@@ -98,7 +95,6 @@ static struct amba_device kmi1_device = {
 		.flags	= IORESOURCE_MEM,
 	},
 	.irq		= { IRQ_KMIINT1, NO_IRQ },
-	.periphid	= 0x00041050,
 };
 
 static struct amba_device *amba_devs[] __initdata = {
@@ -157,6 +153,19 @@ static int __init integrator_init(void)
 {
 	int i;
 
+	/*
+	 * The Integrator/AP lacks necessary AMBA PrimeCell IDs, so we need to
+	 * hard-code them. The Integator/CP and forward have proper cell IDs.
+	 * Else we leave them undefined to the bus driver can autoprobe them.
+	 */
+	if (machine_is_integrator()) {
+		rtc_device.periphid	= 0x00041030;
+		uart0_device.periphid	= 0x00041010;
+		uart1_device.periphid	= 0x00041010;
+		kmi0_device.periphid	= 0x00041050;
+		kmi1_device.periphid	= 0x00041050;
+	}
+
 	for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 		struct amba_device *d = amba_devs[i];
 		amba_device_register(d, &iomem_resource);

arch/arm/mach-kirkwood/sheevaplug-setup.c

@@ -107,7 +107,7 @@ static void __init sheevaplug_init(void)
 	kirkwood_init();
 
 	/* setup gpio pin select */
-	if (machine_is_sheeva_esata())
+	if (machine_is_esata_sheevaplug())
 		kirkwood_mpp_conf(sheeva_esata_mpp_config);
 	else
 		kirkwood_mpp_conf(sheevaplug_mpp_config);
@@ -123,11 +123,11 @@ static void __init sheevaplug_init(void)
 	kirkwood_ge00_init(&sheevaplug_ge00_data);
 
 	/* honor lower power consumption for plugs with out eSATA */
-	if (machine_is_sheeva_esata())
+	if (machine_is_esata_sheevaplug())
 		kirkwood_sata_init(&sheeva_esata_sata_data);
 
 	/* enable sd wp and sd cd on plugs with esata */
-	if (machine_is_sheeva_esata())
+	if (machine_is_esata_sheevaplug())
 		kirkwood_sdio_init(&sheeva_esata_mvsdio_data);
 	else
 		kirkwood_sdio_init(&sheevaplug_mvsdio_data);

arch/arm/mach-orion5x/ts209-setup.c

@@ -178,7 +178,7 @@ static struct hw_pci qnap_ts209_pci __initdata = {
 
 static int __init qnap_ts209_pci_init(void)
 {
-	if (machine_is_ts_x09())
+	if (machine_is_ts209())
 		pci_common_init(&qnap_ts209_pci);
 
 	return 0;

arch/arm/mach-shmobile/include/mach/gpio.h

@@ -12,8 +12,6 @@
 
 #include <linux/kernel.h>
 #include <linux/errno.h>
-
-#define ARCH_NR_GPIOS 1024
 #include <linux/sh_pfc.h>
 
 #ifdef CONFIG_GPIOLIB

arch/arm/mach-ux500/include/mach/gpio.h

 #ifndef __ASM_ARCH_GPIO_H
 #define __ASM_ARCH_GPIO_H
 
-/*
- * 288 (#267 is the highest one actually hooked up) onchip GPIOs, plus enough
- * room for a couple of GPIO expanders.
- */
-#define ARCH_NR_GPIOS	350
 
 #endif /* __ASM_ARCH_GPIO_H */

arch/arm/mm/fault.c

@@ -231,7 +231,7 @@ static inline bool access_error(unsigned int fsr, struct vm_area_struct *vma)
 
 static int __kprobes
 __do_page_fault(struct mm_struct *mm, unsigned long addr, unsigned int fsr,
-		struct task_struct *tsk)
+		unsigned int flags, struct task_struct *tsk)
 {
 	struct vm_area_struct *vma;
 	int fault;
@@ -253,18 +253,7 @@ __do_page_fault(struct mm_struct *mm, unsigned long addr, unsigned int fsr,
 		goto out;
 	}
 
-	/*
-	 * If for any reason at all we couldn't handle the fault, make
-	 * sure we exit gracefully rather than endlessly redo the fault.
-	 */
-	fault = handle_mm_fault(mm, vma, addr & PAGE_MASK, (fsr & FSR_WRITE) ? FAULT_FLAG_WRITE : 0);
-	if (unlikely(fault & VM_FAULT_ERROR))
-		return fault;
-	if (fault & VM_FAULT_MAJOR)
-		tsk->maj_flt++;
-	else
-		tsk->min_flt++;
-	return fault;
+	return handle_mm_fault(mm, vma, addr & PAGE_MASK, flags);
 
 check_stack:
 	if (vma->vm_flags & VM_GROWSDOWN && !expand_stack(vma, addr))
@@ -279,6 +268,9 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 	struct task_struct *tsk;
 	struct mm_struct *mm;
 	int fault, sig, code;
+	int write = fsr & FSR_WRITE;
+	unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE |
+				(write ? FAULT_FLAG_WRITE : 0);
 
 	if (notify_page_fault(regs, fsr))
 		return 0;
@@ -305,6 +297,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 	if (!down_read_trylock(&mm->mmap_sem)) {
 		if (!user_mode(regs) && !search_exception_tables(regs->ARM_pc))
 			goto no_context;
+retry:
 		down_read(&mm->mmap_sem);
 	} else {
 		/*
@@ -320,14 +313,41 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 #endif
 	}
 
-	fault = __do_page_fault(mm, addr, fsr, tsk);
-	up_read(&mm->mmap_sem);
+	fault = __do_page_fault(mm, addr, fsr, flags, tsk);
+
+	/* If we need to retry but a fatal signal is pending, handle the
+	 * signal first. We do not need to release the mmap_sem because
+	 * it would already be released in __lock_page_or_retry in
+	 * mm/filemap.c. */
+	if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+		return 0;
+
+	/*
+	 * Major/minor page fault accounting is only done on the
+	 * initial attempt. If we go through a retry, it is extremely
+	 * likely that the page will be found in page cache at that point.
+	 */
 
 	perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr);
-	if (fault & VM_FAULT_MAJOR)
-		perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, addr);
-	else if (fault & VM_FAULT_MINOR)
-		perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, addr);
+	if (flags & FAULT_FLAG_ALLOW_RETRY) {
+		if (fault & VM_FAULT_MAJOR) {
+			tsk->maj_flt++;
+			perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1,
+					regs, addr);
+		} else {
+			tsk->min_flt++;
+			perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1,
+					regs, addr);
+		}
+		if (fault & VM_FAULT_RETRY) {
+			/* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk
+			* of starvation. */
+			flags &= ~FAULT_FLAG_ALLOW_RETRY;
+			goto retry;
+		}
+	}
+
+	up_read(&mm->mmap_sem);
 
 	/*
 	 * Handle the "normal" case first - VM_FAULT_MAJOR / VM_FAULT_MINOR

arch/arm/mm/mmap.c

@@ -11,10 +11,49 @@
 #include <linux/random.h>
 #include <asm/cachetype.h>
 
+static inline unsigned long COLOUR_ALIGN_DOWN(unsigned long addr,
+					      unsigned long pgoff)
+{
+	unsigned long base = addr & ~(SHMLBA-1);
+	unsigned long off = (pgoff << PAGE_SHIFT) & (SHMLBA-1);
+
+	if (base + off <= addr)
+		return base + off;
+
+	return base - off;
+}
+
 #define COLOUR_ALIGN(addr,pgoff)		\
 	((((addr)+SHMLBA-1)&~(SHMLBA-1)) +	\
 	 (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1)))
 
+/* gap between mmap and stack */
+#define MIN_GAP (128*1024*1024UL)
+#define MAX_GAP ((TASK_SIZE)/6*5)
+
+static int mmap_is_legacy(void)
+{
+	if (current->personality & ADDR_COMPAT_LAYOUT)
+		return 1;
+
+	if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
+		return 1;
+
+	return sysctl_legacy_va_layout;
+}
+
+static unsigned long mmap_base(unsigned long rnd)
+{
+	unsigned long gap = rlimit(RLIMIT_STACK);
+
+	if (gap < MIN_GAP)
+		gap = MIN_GAP;
+	else if (gap > MAX_GAP)
+		gap = MAX_GAP;
+
+	return PAGE_ALIGN(TASK_SIZE - gap - rnd);
+}
+
 /*
  * We need to ensure that shared mappings are correctly aligned to
  * avoid aliasing issues with VIPT caches.  We need to ensure that
@@ -68,13 +107,9 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
 	if (len > mm->cached_hole_size) {
 	        start_addr = addr = mm->free_area_cache;
 	} else {
-	        start_addr = addr = TASK_UNMAPPED_BASE;
+	        start_addr = addr = mm->mmap_base;
 	        mm->cached_hole_size = 0;
 	}
-	/* 8 bits of randomness in 20 address space bits */
-	if ((current->flags & PF_RANDOMIZE) &&
-	    !(current->personality & ADDR_NO_RANDOMIZE))
-		addr += (get_random_int() % (1 << 8)) << PAGE_SHIFT;
 
 full_search:
 	if (do_align)
@@ -111,6 +146,134 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
 	}
 }
 
+unsigned long
+arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
+			const unsigned long len, const unsigned long pgoff,
+			const unsigned long flags)
+{
+	struct vm_area_struct *vma;
+	struct mm_struct *mm = current->mm;
+	unsigned long addr = addr0;
+	int do_align = 0;
+	int aliasing = cache_is_vipt_aliasing();
+
+	/*
+	 * We only need to do colour alignment if either the I or D
+	 * caches alias.
+	 */
+	if (aliasing)
+		do_align = filp || (flags & MAP_SHARED);
+
+	/* requested length too big for entire address space */
+	if (len > TASK_SIZE)
+		return -ENOMEM;
+
+	if (flags & MAP_FIXED) {
+		if (aliasing && flags & MAP_SHARED &&
+		    (addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))
+			return -EINVAL;
+		return addr;
+	}
+
+	/* requesting a specific address */
+	if (addr) {
+		if (do_align)
+			addr = COLOUR_ALIGN(addr, pgoff);
+		else
+			addr = PAGE_ALIGN(addr);
+		vma = find_vma(mm, addr);
+		if (TASK_SIZE - len >= addr &&
+				(!vma || addr + len <= vma->vm_start))
+			return addr;
+	}
+
+	/* check if free_area_cache is useful for us */
+	if (len <= mm->cached_hole_size) {
+		mm->cached_hole_size = 0;
+		mm->free_area_cache = mm->mmap_base;
+	}
+
+	/* either no address requested or can't fit in requested address hole */
+	addr = mm->free_area_cache;
+	if (do_align) {
+		unsigned long base = COLOUR_ALIGN_DOWN(addr - len, pgoff);
+		addr = base + len;
+	}
+
+	/* make sure it can fit in the remaining address space */
+	if (addr > len) {
+		vma = find_vma(mm, addr-len);
+		if (!vma || addr <= vma->vm_start)
+			/* remember the address as a hint for next time */
+			return (mm->free_area_cache = addr-len);
+	}
+
+	if (mm->mmap_base < len)
+		goto bottomup;
+
+	addr = mm->mmap_base - len;
+	if (do_align)
+		addr = COLOUR_ALIGN_DOWN(addr, pgoff);
+
+	do {
+		/*
+		 * Lookup failure means no vma is above this address,
+		 * else if new region fits below vma->vm_start,
+		 * return with success:
+		 */
+		vma = find_vma(mm, addr);
+		if (!vma || addr+len <= vma->vm_start)
+			/* remember the address as a hint for next time */
+			return (mm->free_area_cache = addr);
+
+		/* remember the largest hole we saw so far */
+		if (addr + mm->cached_hole_size < vma->vm_start)
+			mm->cached_hole_size = vma->vm_start - addr;
+
+		/* try just below the current vma->vm_start */
+		addr = vma->vm_start - len;
+		if (do_align)
+			addr = COLOUR_ALIGN_DOWN(addr, pgoff);
+	} while (len < vma->vm_start);
+
+bottomup:
+	/*
+	 * A failed mmap() very likely causes application failure,
+	 * so fall back to the bottom-up function here. This scenario
+	 * can happen with large stack limits and large mmap()
+	 * allocations.
+	 */
+	mm->cached_hole_size = ~0UL;
+	mm->free_area_cache = TASK_UNMAPPED_BASE;
+	addr = arch_get_unmapped_area(filp, addr0, len, pgoff, flags);
+	/*
+	 * Restore the topdown base:
+	 */
+	mm->free_area_cache = mm->mmap_base;
+	mm->cached_hole_size = ~0UL;
+
+	return addr;
+}
+
+void arch_pick_mmap_layout(struct mm_struct *mm)
+{
+	unsigned long random_factor = 0UL;
+
+	/* 8 bits of randomness in 20 address space bits */
+	if ((current->flags & PF_RANDOMIZE) &&
+	    !(current->personality & ADDR_NO_RANDOMIZE))
+		random_factor = (get_random_int() % (1 << 8)) << PAGE_SHIFT;
+
+	if (mmap_is_legacy()) {
+		mm->mmap_base = TASK_UNMAPPED_BASE + random_factor;
+		mm->get_unmapped_area = arch_get_unmapped_area;
+		mm->unmap_area = arch_unmap_area;
+	} else {
+		mm->mmap_base = mmap_base(random_factor);
+		mm->get_unmapped_area = arch_get_unmapped_area_topdown;
+		mm->unmap_area = arch_unmap_area_topdown;
+	}
+}
 
 /*
  * You really shouldn't be using read() or write() on /dev/mem.  This

arch/arm/mm/proc-v7.S

@@ -284,6 +284,7 @@ __v7_ca5mp_setup:
 __v7_ca9mp_setup:
 	mov	r10, #(1 << 0)			@ TLB ops broadcasting
 	b	1f
+__v7_ca7mp_setup:
 __v7_ca15mp_setup:
 	mov	r10, #0
 1:
@@ -464,6 +465,16 @@ __v7_ca5mp_proc_info:
 	__v7_proc __v7_ca5mp_setup
 	.size	__v7_ca5mp_proc_info, . - __v7_ca5mp_proc_info
 
+	/*
+	 * ARM Ltd. Cortex A7 processor.
+	 */
+	.type	__v7_ca7mp_proc_info, #object
+__v7_ca7mp_proc_info:
+	.long	0x410fc070
+	.long	0xff0ffff0
+	__v7_proc __v7_ca7mp_setup, hwcaps = HWCAP_IDIV
+	.size	__v7_ca7mp_proc_info, . - __v7_ca7mp_proc_info
+
 	/*
 	 * ARM Ltd. Cortex A9 processor.
 	 */

arch/arm/nwfpe/entry.S

@@ -20,6 +20,8 @@
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
+#include <asm/opcodes.h>
+
 /* This is the kernel's entry point into the floating point emulator.
 It is called from the kernel with code similar to this:
 
@@ -81,11 +83,11 @@ nwfpe_enter:
 	mov	r6, r0			@ save the opcode
 emulate:
 	ldr	r1, [sp, #S_PSR]	@ fetch the PSR
-	bl	checkCondition		@ check the condition
-	cmp	r0, #0			@ r0 = 0 ==> condition failed
+	bl	arm_check_condition	@ check the condition
+	cmp	r0, #ARM_OPCODE_CONDTEST_PASS	@ condition passed?
 
 	@ if condition code failed to match, next insn
-	beq	next			@ get the next instruction;
+	bne	next			@ get the next instruction;
 
 	mov	r0, r6			@ prepare for EmulateAll()
 	bl	EmulateAll		@ emulate the instruction

arch/arm/nwfpe/fpopcode.c

@@ -61,29 +61,3 @@ const float32 float32Constant[] = {
 	0x41200000		/* single 10.0 */
 };
 
-/* condition code lookup table
- index into the table is test code: EQ, NE, ... LT, GT, AL, NV
- bit position in short is condition code: NZCV */
-static const unsigned short aCC[16] = {
-	0xF0F0,			// EQ == Z set
-	0x0F0F,			// NE
-	0xCCCC,			// CS == C set
-	0x3333,			// CC
-	0xFF00,			// MI == N set
-	0x00FF,			// PL
-	0xAAAA,			// VS == V set
-	0x5555,			// VC
-	0x0C0C,			// HI == C set && Z clear
-	0xF3F3,			// LS == C clear || Z set
-	0xAA55,			// GE == (N==V)
-	0x55AA,			// LT == (N!=V)
-	0x0A05,			// GT == (!Z && (N==V))
-	0xF5FA,			// LE == (Z || (N!=V))
-	0xFFFF,			// AL always
-	0			// NV
-};
-
-unsigned int checkCondition(const unsigned int opcode, const unsigned int ccodes)
-{
-	return (aCC[opcode >> 28] >> (ccodes >> 28)) & 1;
-}

arch/arm/nwfpe/fpopcode.h

@@ -475,9 +475,6 @@ static inline unsigned int getDestinationSize(const unsigned int opcode)
 	return (nRc);
 }
 
-extern unsigned int checkCondition(const unsigned int opcode,
-				   const unsigned int ccodes);
-
 extern const float64 float64Constant[];
 extern const float32 float32Constant[];