Linux-libre 4.4-gnupck-4.4-gnu

15 files changed, 116 insertions, 173 deletions

diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 874e1823f..066f7f9ba 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -456,7 +456,6 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
 		sys->busnr   = busnr;
 		sys->swizzle = hw->swizzle;
 		sys->map_irq = hw->map_irq;
-		sys->align_resource = hw->align_resource;
 		INIT_LIST_HEAD(&sys->resources);
 
 		if (hw->private_data)
@@ -465,6 +464,8 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
 		ret = hw->setup(nr, sys);
 
 		if (ret > 0) {
+			struct pci_host_bridge *host_bridge;
+
 			ret = pcibios_init_resources(nr, sys);
 			if (ret)  {
 				kfree(sys);
@@ -486,6 +487,9 @@ static void pcibios_init_hw(struct device *parent, struct hw_pci *hw,
 			busnr = sys->bus->busn_res.end + 1;
 
 			list_add(&sys->node, head);
+
+			host_bridge = pci_find_host_bridge(sys->bus);
+			host_bridge->align_resource = hw->align_resource;
 		} else {
 			kfree(sys);
 			if (ret < 0)
@@ -572,16 +576,19 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
 				resource_size_t size, resource_size_t align)
 {
 	struct pci_dev *dev = data;
-	struct pci_sys_data *sys = dev->sysdata;
 	resource_size_t start = res->start;
+	struct pci_host_bridge *host_bridge;
 
 	if (res->flags & IORESOURCE_IO && start & 0x300)
 		start = (start + 0x3ff) & ~0x3ff;
 
 	start = (start + align - 1) & ~(align - 1);
 
-	if (sys->align_resource)
-		return sys->align_resource(dev, res, start, size, align);
+	host_bridge = pci_find_host_bridge(dev->bus);
+
+	if (host_bridge->align_resource)
+		return host_bridge->align_resource(dev, res,
+				start, size, align);
 
 	return start;
 }
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index fde6c88d5..ac368bb06 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -399,6 +399,7 @@
 		CALL(sys_execveat)
 		CALL(sys_userfaultfd)
 		CALL(sys_membarrier)
+		CALL(sys_mlock2)
 #ifndef syscalls_counted
 .equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
 #define syscalls_counted
diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index 11c54de9f..65addcbf5 100644
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -101,6 +101,7 @@ void __init arm_dt_init_cpu_maps(void)
 		if (of_property_read_u32(cpu, "reg", &hwid)) {
 			pr_debug(" * %s missing reg property\n",
 				     cpu->full_name);
+			of_node_put(cpu);
 			return;
 		}
 
@@ -108,8 +109,10 @@ void __init arm_dt_init_cpu_maps(void)
 		 * 8 MSBs must be set to 0 in the DT since the reg property
 		 * defines the MPIDR[23:0].
 		 */
-		if (hwid & ~MPIDR_HWID_BITMASK)
+		if (hwid & ~MPIDR_HWID_BITMASK) {
+			of_node_put(cpu);
 			return;
+		}
 
 		/*
 		 * Duplicate MPIDRs are a recipe for disaster.
@@ -119,9 +122,11 @@ void __init arm_dt_init_cpu_maps(void)
 		 * to avoid matching valid MPIDR[23:0] values.
 		 */
 		for (j = 0; j < cpuidx; j++)
-			if (WARN(tmp_map[j] == hwid, "Duplicate /cpu reg "
-						     "properties in the DT\n"))
+			if (WARN(tmp_map[j] == hwid,
+				 "Duplicate /cpu reg properties in the DT\n")) {
+				of_node_put(cpu);
 				return;
+			}
 
 		/*
 		 * Build a stashed array of MPIDR values. Numbering scheme
@@ -143,6 +148,7 @@ void __init arm_dt_init_cpu_maps(void)
 					       "max cores %u, capping them\n",
 					       cpuidx, nr_cpu_ids)) {
 			cpuidx = nr_cpu_ids;
+			of_node_put(cpu);
 			break;
 		}
 
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 3e1c26eb3..3ce377f72 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -427,8 +427,7 @@ ENDPROC(__fiq_abt)
 	.endm
 
 	.macro	kuser_cmpxchg_check
-#if !defined(CONFIG_CPU_32v6K) && defined(CONFIG_KUSER_HELPERS) && \
-    !defined(CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG)
+#if !defined(CONFIG_CPU_32v6K) && defined(CONFIG_KUSER_HELPERS)
 #ifndef CONFIG_MMU
 #warning "NPTL on non MMU needs fixing"
 #else
@@ -859,20 +858,7 @@ __kuser_helper_start:
 
 __kuser_cmpxchg64:				@ 0xffff0f60
 
-#if defined(CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG)
-
-	/*
-	 * Poor you.  No fast solution possible...
-	 * The kernel itself must perform the operation.
-	 * A special ghost syscall is used for that (see traps.c).
-	 */
-	stmfd	sp!, {r7, lr}
-	ldr	r7, 1f			@ it's 20 bits
-	swi	__ARM_NR_cmpxchg64
-	ldmfd	sp!, {r7, pc}
-1:	.word	__ARM_NR_cmpxchg64
-
-#elif defined(CONFIG_CPU_32v6K)
+#if defined(CONFIG_CPU_32v6K)
 
 	stmfd	sp!, {r4, r5, r6, r7}
 	ldrd	r4, r5, [r0]			@ load old val
@@ -948,20 +934,7 @@ __kuser_memory_barrier:				@ 0xffff0fa0
 
 __kuser_cmpxchg:				@ 0xffff0fc0
 
-#if defined(CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG)
-
-	/*
-	 * Poor you.  No fast solution possible...
-	 * The kernel itself must perform the operation.
-	 * A special ghost syscall is used for that (see traps.c).
-	 */
-	stmfd	sp!, {r7, lr}
-	ldr	r7, 1f			@ it's 20 bits
-	swi	__ARM_NR_cmpxchg
-	ldmfd	sp!, {r7, pc}
-1:	.word	__ARM_NR_cmpxchg
-
-#elif __LINUX_ARM_ARCH__ < 6
+#if __LINUX_ARM_ARCH__ < 6
 
 #ifdef CONFIG_MMU
 
diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c
index dc7d0a95b..6284779d6 100644
--- a/arch/arm/kernel/hw_breakpoint.c
+++ b/arch/arm/kernel/hw_breakpoint.c
@@ -35,7 +35,6 @@
 #include <asm/cputype.h>
 #include <asm/current.h>
 #include <asm/hw_breakpoint.h>
-#include <asm/kdebug.h>
 #include <asm/traps.h>
 
 /* Breakpoint currently in use for each BRP. */
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 2766183e6..1d45320ee 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -39,6 +39,7 @@
 #include <linux/export.h>
 
 #include <asm/hardware/cache-l2x0.h>
+#include <asm/hardware/cache-uniphier.h>
 #include <asm/outercache.h>
 #include <asm/exception.h>
 #include <asm/mach/arch.h>
@@ -97,6 +98,8 @@ void __init init_IRQ(void)
 		if (ret)
 			pr_err("L2C: failed to init: %d\n", ret);
 	}
+
+	uniphier_cache_init();
 }
 
 #ifdef CONFIG_MULTI_IRQ_HANDLER
diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c
index fd9eefce0..9232caee7 100644
--- a/arch/arm/kernel/kgdb.c
+++ b/arch/arm/kernel/kgdb.c
@@ -74,7 +74,7 @@ int dbg_set_reg(int regno, void *mem, struct pt_regs *regs)
 void
 sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *task)
 {
-	struct pt_regs *thread_regs;
+	struct thread_info *ti;
 	int regno;
 
 	/* Just making sure... */
@@ -86,24 +86,17 @@ sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *task)
 		gdb_regs[regno] = 0;
 
 	/* Otherwise, we have only some registers from switch_to() */
-	thread_regs		= task_pt_regs(task);
-	gdb_regs[_R0]		= thread_regs->ARM_r0;
-	gdb_regs[_R1]		= thread_regs->ARM_r1;
-	gdb_regs[_R2]		= thread_regs->ARM_r2;
-	gdb_regs[_R3]		= thread_regs->ARM_r3;
-	gdb_regs[_R4]		= thread_regs->ARM_r4;
-	gdb_regs[_R5]		= thread_regs->ARM_r5;
-	gdb_regs[_R6]		= thread_regs->ARM_r6;
-	gdb_regs[_R7]		= thread_regs->ARM_r7;
-	gdb_regs[_R8]		= thread_regs->ARM_r8;
-	gdb_regs[_R9]		= thread_regs->ARM_r9;
-	gdb_regs[_R10]		= thread_regs->ARM_r10;
-	gdb_regs[_FP]		= thread_regs->ARM_fp;
-	gdb_regs[_IP]		= thread_regs->ARM_ip;
-	gdb_regs[_SPT]		= thread_regs->ARM_sp;
-	gdb_regs[_LR]		= thread_regs->ARM_lr;
-	gdb_regs[_PC]		= thread_regs->ARM_pc;
-	gdb_regs[_CPSR]		= thread_regs->ARM_cpsr;
+	ti			= task_thread_info(task);
+	gdb_regs[_R4]		= ti->cpu_context.r4;
+	gdb_regs[_R5]		= ti->cpu_context.r5;
+	gdb_regs[_R6]		= ti->cpu_context.r6;
+	gdb_regs[_R7]		= ti->cpu_context.r7;
+	gdb_regs[_R8]		= ti->cpu_context.r8;
+	gdb_regs[_R9]		= ti->cpu_context.r9;
+	gdb_regs[_R10]		= ti->cpu_context.sl;
+	gdb_regs[_FP]		= ti->cpu_context.fp;
+	gdb_regs[_SPT]		= ti->cpu_context.sp;
+	gdb_regs[_PC]		= ti->cpu_context.pc;
 }
 
 void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc)
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 7a7c4cea5..4adfb46e3 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -95,6 +95,22 @@ void __show_regs(struct pt_regs *regs)
 {
 	unsigned long flags;
 	char buf[64];
+#ifndef CONFIG_CPU_V7M
+	unsigned int domain;
+#ifdef CONFIG_CPU_SW_DOMAIN_PAN
+	/*
+	 * Get the domain register for the parent context. In user
+	 * mode, we don't save the DACR, so lets use what it should
+	 * be. For other modes, we place it after the pt_regs struct.
+	 */
+	if (user_mode(regs))
+		domain = DACR_UACCESS_ENABLE;
+	else
+		domain = *(unsigned int *)(regs + 1);
+#else
+	domain = get_domain();
+#endif
+#endif
 
 	show_regs_print_info(KERN_DEFAULT);
 
@@ -123,21 +139,8 @@ void __show_regs(struct pt_regs *regs)
 
 #ifndef CONFIG_CPU_V7M
 	{
-		unsigned int domain = get_domain();
 		const char *segment;
 
-#ifdef CONFIG_CPU_SW_DOMAIN_PAN
-		/*
-		 * Get the domain register for the parent context. In user
-		 * mode, we don't save the DACR, so lets use what it should
-		 * be. For other modes, we place it after the pt_regs struct.
-		 */
-		if (user_mode(regs))
-			domain = DACR_UACCESS_ENABLE;
-		else
-			domain = *(unsigned int *)(regs + 1);
-#endif
-
 		if ((domain & domain_mask(DOMAIN_USER)) ==
 		    domain_val(DOMAIN_USER, DOMAIN_NOACCESS))
 			segment = "none";
@@ -163,11 +166,11 @@ void __show_regs(struct pt_regs *regs)
 		buf[0] = '\0';
 #ifdef CONFIG_CPU_CP15_MMU
 		{
-			unsigned int transbase, dac = get_domain();
+			unsigned int transbase;
 			asm("mrc p15, 0, %0, c2, c0\n\t"
 			    : "=r" (transbase));
 			snprintf(buf, sizeof(buf), "  Table: %08x  DAC: %08x",
-			  	transbase, dac);
+				transbase, domain);
 		}
 #endif
 		asm("mrc p15, 0, %0, c1, c0\n" : "=r" (ctrl));
diff --git a/arch/arm/kernel/psci_smp.c b/arch/arm/kernel/psci_smp.c
index 61c04b02f..9d479b2ea 100644
--- a/arch/arm/kernel/psci_smp.c
+++ b/arch/arm/kernel/psci_smp.c
@@ -71,7 +71,7 @@ int psci_cpu_disable(unsigned int cpu)
 	return 0;
 }
 
-void __ref psci_cpu_die(unsigned int cpu)
+void psci_cpu_die(unsigned int cpu)
 {
 	u32 state = PSCI_POWER_STATE_TYPE_POWER_DOWN <<
 		    PSCI_0_2_POWER_STATE_TYPE_SHIFT;
@@ -83,7 +83,7 @@ void __ref psci_cpu_die(unsigned int cpu)
 	panic("psci: cpu %d failed to shutdown\n", cpu);
 }
 
-int __ref psci_cpu_kill(unsigned int cpu)
+int psci_cpu_kill(unsigned int cpu)
 {
 	int err, i;
 
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 48185a773..b26361355 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -80,7 +80,7 @@ static DECLARE_COMPLETION(cpu_running);
 
 static struct smp_operations smp_ops;
 
-void __init smp_set_ops(struct smp_operations *ops)
+void __init smp_set_ops(const struct smp_operations *ops)
 {
 	if (ops)
 		smp_ops = *ops;
@@ -400,6 +400,7 @@ asmlinkage void secondary_start_kernel(void)
 
 	local_irq_enable();
 	local_fiq_enable();
+	local_abt_enable();
 
 	/*
 	 * OK, it's off to the idle thread for us
@@ -748,6 +749,15 @@ core_initcall(register_cpufreq_notifier);
 
 static void raise_nmi(cpumask_t *mask)
 {
+	/*
+	 * Generate the backtrace directly if we are running in a calling
+	 * context that is not preemptible by the backtrace IPI. Note
+	 * that nmi_cpu_backtrace() automatically removes the current cpu
+	 * from mask.
+	 */
+	if (cpumask_test_cpu(smp_processor_id(), mask) && irqs_disabled())
+		nmi_cpu_backtrace(NULL);
+
 	smp_cross_call(mask, IPI_CPU_BACKTRACE);
 }
 
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index e9035cda1..1bfa7a7f5 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -23,7 +23,6 @@
 #include <linux/of_irq.h>
 #include <linux/of_address.h>
 
-#include <asm/smp_plat.h>
 #include <asm/smp_twd.h>
 
 /* set up by the platform code */
@@ -34,6 +33,8 @@ static unsigned long twd_timer_rate;
 static DEFINE_PER_CPU(bool, percpu_setup_called);
 
 static struct clock_event_device __percpu *twd_evt;
+static unsigned int twd_features =
+		CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
 static int twd_ppi;
 
 static int twd_shutdown(struct clock_event_device *clk)
@@ -294,8 +295,7 @@ static void twd_timer_setup(void)
 	writel_relaxed(0, twd_base + TWD_TIMER_CONTROL);
 
 	clk->name = "local_timer";
-	clk->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
-			CLOCK_EVT_FEAT_C3STOP;
+	clk->features = twd_features;
 	clk->rating = 350;
 	clk->set_state_shutdown = twd_shutdown;
 	clk->set_state_periodic = twd_set_periodic;
@@ -350,6 +350,8 @@ static int __init twd_local_timer_common_register(struct device_node *np)
 		goto out_irq;
 
 	twd_get_clock(np);
+	if (!of_property_read_bool(np, "always-on"))
+		twd_features |= CLOCK_EVT_FEAT_C3STOP;
 
 	/*
 	 * Immediately configure the timer on the boot CPU, unless we need
@@ -392,9 +394,6 @@ static void __init twd_local_timer_of_register(struct device_node *np)
 {
 	int err;
 
-	if (!is_smp() || !setup_max_cpus)
-		return;
-
 	twd_ppi = irq_of_parse_and_map(np, 0);
 	if (!twd_ppi) {
 		err = -EINVAL;
diff --git a/arch/arm/kernel/swp_emulate.c b/arch/arm/kernel/swp_emulate.c
index 5b26e7efa..c3fe769d7 100644
--- a/arch/arm/kernel/swp_emulate.c
+++ b/arch/arm/kernel/swp_emulate.c
@@ -36,10 +36,10 @@
  */
 #define __user_swpX_asm(data, addr, res, temp, B)		\
 	__asm__ __volatile__(					\
-	"	mov		%2, %1\n"			\
-	"0:	ldrex"B"	%1, [%3]\n"			\
-	"1:	strex"B"	%0, %2, [%3]\n"			\
+	"0:	ldrex"B"	%2, [%3]\n"			\
+	"1:	strex"B"	%0, %1, [%3]\n"			\
 	"	cmp		%0, #0\n"			\
+	"	moveq		%1, %2\n"			\
 	"	movne		%0, %4\n"			\
 	"2:\n"							\
 	"	.section	 .text.fixup,\"ax\"\n"		\
diff --git a/arch/arm/kernel/sys_oabi-compat.c b/arch/arm/kernel/sys_oabi-compat.c
index b83f3b773..087acb569 100644
--- a/arch/arm/kernel/sys_oabi-compat.c
+++ b/arch/arm/kernel/sys_oabi-compat.c
@@ -193,15 +193,44 @@ struct oabi_flock64 {
 	pid_t	l_pid;
 } __attribute__ ((packed,aligned(4)));
 
-asmlinkage long sys_oabi_fcntl64(unsigned int fd, unsigned int cmd,
+static long do_locks(unsigned int fd, unsigned int cmd,
 				 unsigned long arg)
 {
-	struct oabi_flock64 user;
 	struct flock64 kernel;
-	mm_segment_t fs = USER_DS; /* initialized to kill a warning */
-	unsigned long local_arg = arg;
-	int ret;
+	struct oabi_flock64 user;
+	mm_segment_t fs;
+	long ret;
+
+	if (copy_from_user(&user, (struct oabi_flock64 __user *)arg,
+			   sizeof(user)))
+		return -EFAULT;
+	kernel.l_type	= user.l_type;
+	kernel.l_whence	= user.l_whence;
+	kernel.l_start	= user.l_start;
+	kernel.l_len	= user.l_len;
+	kernel.l_pid	= user.l_pid;
+
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+	ret = sys_fcntl64(fd, cmd, (unsigned long)&kernel);
+	set_fs(fs);
+
+	if (!ret && (cmd == F_GETLK64 || cmd == F_OFD_GETLK)) {
+		user.l_type	= kernel.l_type;
+		user.l_whence	= kernel.l_whence;
+		user.l_start	= kernel.l_start;
+		user.l_len	= kernel.l_len;
+		user.l_pid	= kernel.l_pid;
+		if (copy_to_user((struct oabi_flock64 __user *)arg,
+				 &user, sizeof(user)))
+			ret = -EFAULT;
+	}
+	return ret;
+}
 
+asmlinkage long sys_oabi_fcntl64(unsigned int fd, unsigned int cmd,
+				 unsigned long arg)
+{
 	switch (cmd) {
 	case F_OFD_GETLK:
 	case F_OFD_SETLK:
@@ -209,39 +238,11 @@ asmlinkage long sys_oabi_fcntl64(unsigned int fd, unsigned int cmd,
 	case F_GETLK64:
 	case F_SETLK64:
 	case F_SETLKW64:
-		if (copy_from_user(&user, (struct oabi_flock64 __user *)arg,
-				   sizeof(user)))
-			return -EFAULT;
-		kernel.l_type	= user.l_type;
-		kernel.l_whence	= user.l_whence;
-		kernel.l_start	= user.l_start;
-		kernel.l_len	= user.l_len;
-		kernel.l_pid	= user.l_pid;
-		local_arg = (unsigned long)&kernel;
-		fs = get_fs();
-		set_fs(KERNEL_DS);
-	}
-
-	ret = sys_fcntl64(fd, cmd, local_arg);
+		return do_locks(fd, cmd, arg);
 
-	switch (cmd) {
-	case F_GETLK64:
-		if (!ret) {
-			user.l_type	= kernel.l_type;
-			user.l_whence	= kernel.l_whence;
-			user.l_start	= kernel.l_start;
-			user.l_len	= kernel.l_len;
-			user.l_pid	= kernel.l_pid;
-			if (copy_to_user((struct oabi_flock64 __user *)arg,
-					 &user, sizeof(user)))
-				ret = -EFAULT;
-		}
-	case F_SETLK64:
-	case F_SETLKW64:
-		set_fs(fs);
+	default:
+		return sys_fcntl64(fd, cmd, arg);
 	}
-
-	return ret;
 }
 
 struct oabi_epoll_event {
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index a66e37e21..97b22fa7c 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -120,6 +120,6 @@ void __init time_init(void)
 #ifdef CONFIG_COMMON_CLK
 		of_clk_init(NULL);
 #endif
-		clocksource_of_init();
+		clocksource_probe();
 	}
 }
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 969f9d9e6..bc698383e 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -625,58 +625,6 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
 		set_tls(regs->ARM_r0);
 		return 0;
 
-#ifdef CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG
-	/*
-	 * Atomically store r1 in *r2 if *r2 is equal to r0 for user space.
-	 * Return zero in r0 if *MEM was changed or non-zero if no exchange
-	 * happened.  Also set the user C flag accordingly.
-	 * If access permissions have to be fixed up then non-zero is
-	 * returned and the operation has to be re-attempted.
-	 *
-	 * *NOTE*: This is a ghost syscall private to the kernel.  Only the
-	 * __kuser_cmpxchg code in entry-armv.S should be aware of its
-	 * existence.  Don't ever use this from user code.
-	 */
-	case NR(cmpxchg):
-	for (;;) {
-		extern void do_DataAbort(unsigned long addr, unsigned int fsr,
-					 struct pt_regs *regs);
-		unsigned long val;
-		unsigned long addr = regs->ARM_r2;
-		struct mm_struct *mm = current->mm;
-		pgd_t *pgd; pmd_t *pmd; pte_t *pte;
-		spinlock_t *ptl;
-
-		regs->ARM_cpsr &= ~PSR_C_BIT;
-		down_read(&mm->mmap_sem);
-		pgd = pgd_offset(mm, addr);
-		if (!pgd_present(*pgd))
-			goto bad_access;
-		pmd = pmd_offset(pgd, addr);
-		if (!pmd_present(*pmd))
-			goto bad_access;
-		pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
-		if (!pte_present(*pte) || !pte_write(*pte) || !pte_dirty(*pte)) {
-			pte_unmap_unlock(pte, ptl);
-			goto bad_access;
-		}
-		val = *(unsigned long *)addr;
-		val -= regs->ARM_r0;
-		if (val == 0) {
-			*(unsigned long *)addr = regs->ARM_r1;
-			regs->ARM_cpsr |= PSR_C_BIT;
-		}
-		pte_unmap_unlock(pte, ptl);
-		up_read(&mm->mmap_sem);
-		return val;
-
-		bad_access:
-		up_read(&mm->mmap_sem);
-		/* simulate a write access fault */
-		do_DataAbort(addr, 15 + (1 << 11), regs);
-	}
-#endif
-
 	default:
 		/* Calls 9f00xx..9f07ff are defined to return -ENOSYS
 		   if not implemented, rather than raising SIGILL.  This