Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:

 - add arch/arm/Kbuild from Masahiro Yamada.

 - simplify act_mm macro, since it contains an open-coded
   get_thread_info.

 - VFP updates for Clang from Stefan Agner.

 - Fix unwinder for Clang from Nathan Huckleberry.

 - Remove unused it8152 PCI host controller, used by the removed cm-x2xx
   platforms from Mike Rapoport.

 - Further explanation of __range_ok().

 - Remove kimage_voffset that isn't used anymore from Marc Zyngier.

 - Drop ancient Thumb-2 workaround for old binutils from Ard Biesheuvel.

 - Documentation cleanup for mach-* from Pete Zaitcev.

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8996/1: Documentation/Clean up the description of mach-<class>
  ARM: 8995/1: drop Thumb-2 workaround for ancient binutils
  ARM: 8994/1: mm: drop kimage_voffset which was only used by KVM
  ARM: uaccess: add further explanation of __range_ok()
  ARM: 8993/1: remove it8152 PCI controller driver
  ARM: 8992/1: Fix unwind_frame for clang-built kernels
  ARM: 8991/1: use VFP assembler mnemonics if available
  ARM: 8990/1: use VFP assembler mnemonics in register load/store macros
  ARM: 8989/1: use .fpu assembler directives instead of assembler arguments
  ARM: 8982/1: mm: Simplify act_mm macro
  ARM: 8981/1: add arch/arm/Kbuild

Documentation/arm/arm.rst

@@ -184,10 +184,8 @@ Kernel entry (head.S)
   We group machine (or platform) support code into machine classes.  A
   class typically based around one or more system on a chip devices, and
   acts as a natural container around the actual implementations.  These
-  classes are given directories - arch/arm/mach-<class> and
-  arch/arm/mach-<class> - which contain the source files to/include/mach
-  support the machine class.  This directories also contain any machine
-  specific supporting code.
+  classes are given directories - arch/arm/mach-<class> - which contain
+  the source files and include/mach/ to support the machine class.
 
   For example, the SA1100 class is based upon the SA1100 and SA1110 SoC
   devices, and contains the code to support the way the on-board and off-

arch/arm/Kbuild

+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_FPE_NWFPE)		+= nwfpe/
+# Put arch/arm/fastfpe/ to use this.
+obj-$(CONFIG_FPE_FASTFPE)	+= $(patsubst $(srctree)/$(src)/%,%,$(wildcard $(srctree)/$(src)/fastfpe/))
+obj-$(CONFIG_VFP)		+= vfp/
+obj-$(CONFIG_XEN)		+= xen/
+obj-$(CONFIG_VDSO)		+= vdso/
+obj-y				+= kernel/ mm/ common/
+obj-y				+= probes/
+obj-y				+= net/
+obj-y				+= crypto/

arch/arm/Kconfig

@@ -1150,12 +1150,6 @@ config PCI_NANOENGINE
 	help
 	  Enable PCI on the BSE nanoEngine board.
 
-config PCI_HOST_ITE8152
-	bool
-	depends on PCI && MACH_ARMCORE
-	default y
-	select DMABOUNCE
-
 config ARM_ERRATA_814220
 	bool "ARM errata: Cache maintenance by set/way operations can execute out of order"
 	depends on CPU_V7
@@ -1430,37 +1424,6 @@ config THUMB2_KERNEL
 
 	  If unsure, say N.
 
-config THUMB2_AVOID_R_ARM_THM_JUMP11
-	bool "Work around buggy Thumb-2 short branch relocations in gas"
-	depends on THUMB2_KERNEL && MODULES
-	default y
-	help
-	  Various binutils versions can resolve Thumb-2 branches to
-	  locally-defined, preemptible global symbols as short-range "b.n"
-	  branch instructions.
-
-	  This is a problem, because there's no guarantee the final
-	  destination of the symbol, or any candidate locations for a
-	  trampoline, are within range of the branch.  For this reason, the
-	  kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
-	  relocation in modules at all, and it makes little sense to add
-	  support.
-
-	  The symptom is that the kernel fails with an "unsupported
-	  relocation" error when loading some modules.
-
-	  Until fixed tools are available, passing
-	  -fno-optimize-sibling-calls to gcc should prevent gcc generating
-	  code which hits this problem, at the cost of a bit of extra runtime
-	  stack usage in some cases.
-
-	  The problem is described in more detail at:
-	      https://bugs.launchpad.net/binutils-linaro/+bug/725126
-
-	  Only Thumb-2 kernels are affected.
-
-	  Unless you are sure your tools don't have this problem, say Y.
-
 config ARM_PATCH_IDIV
 	bool "Runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()"
 	depends on CPU_32v7 && !XIP_KERNEL
@@ -2099,3 +2062,5 @@ source "drivers/firmware/Kconfig"
 if CRYPTO
 source "arch/arm/crypto/Kconfig"
 endif
+
+source "arch/arm/Kconfig.assembler"

arch/arm/Kconfig.assembler

+# SPDX-License-Identifier: GPL-2.0
+
+config AS_VFP_VMRS_FPINST
+	def_bool $(as-instr,.fpu vfpv2\nvmrs r0$(comma)FPINST)
+	help
+	  Supported by binutils >= 2.24 and LLVM integrated assembler.

arch/arm/Makefile

@@ -123,10 +123,6 @@ AFLAGS_NOWARN	:=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
 ifeq ($(CONFIG_THUMB2_KERNEL),y)
 CFLAGS_ISA	:=-mthumb -Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
 AFLAGS_ISA	:=$(CFLAGS_ISA) -Wa$(comma)-mthumb
-# Work around buggy relocation from gas if requested:
-ifeq ($(CONFIG_THUMB2_AVOID_R_ARM_THM_JUMP11),y)
-KBUILD_CFLAGS_MODULE	+=-fno-optimize-sibling-calls
-endif
 else
 CFLAGS_ISA	:=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
 AFLAGS_ISA	:=$(CFLAGS_ISA)
@@ -276,18 +272,8 @@ endif
 
 export	TEXT_OFFSET GZFLAGS MMUEXT
 
-core-$(CONFIG_FPE_NWFPE)	+= arch/arm/nwfpe/
-# Put arch/arm/fastfpe/ to use this.
-core-$(CONFIG_FPE_FASTFPE)	+= $(patsubst $(srctree)/%,%,$(wildcard $(srctree)/arch/arm/fastfpe/))
-core-$(CONFIG_VFP)		+= arch/arm/vfp/
-core-$(CONFIG_XEN)		+= arch/arm/xen/
-core-$(CONFIG_VDSO)		+= arch/arm/vdso/
-
+core-y				+= arch/arm/
 # If we have a machine-specific directory, then include it in the build.
-core-y				+= arch/arm/kernel/ arch/arm/mm/ arch/arm/common/
-core-y				+= arch/arm/probes/
-core-y				+= arch/arm/net/
-core-y				+= arch/arm/crypto/
 core-y				+= $(machdirs) $(platdirs)
 
 # For cleaning

arch/arm/common/Makefile

@@ -12,7 +12,6 @@ obj-$(CONFIG_SHARP_LOCOMO)	+= locomo.o
 obj-$(CONFIG_SHARP_PARAM)	+= sharpsl_param.o
 obj-$(CONFIG_SHARP_SCOOP)	+= scoop.o
 obj-$(CONFIG_CPU_V7)		+= secure_cntvoff.o
-obj-$(CONFIG_PCI_HOST_ITE8152)  += it8152.o
 obj-$(CONFIG_MCPM)		+= mcpm_head.o mcpm_entry.o mcpm_platsmp.o vlock.o
 CFLAGS_REMOVE_mcpm_entry.o	= -pg
 AFLAGS_mcpm_head.o		:= -march=armv7-a

arch/arm/common/it8152.c

-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * linux/arch/arm/common/it8152.c
- *
- * Copyright Compulab Ltd, 2002-2007
- * Mike Rapoport <mike@compulab.co.il>
- *
- * The DMA bouncing part is taken from arch/arm/mach-ixp4xx/common-pci.c
- * (see this file for respective copyrights)
- *
- * Thanks to Guennadi Liakhovetski <gl@dsa-ac.de> for IRQ enumberation
- * and demux code.
- */
-
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/ptrace.h>
-#include <linux/interrupt.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/export.h>
-
-#include <asm/mach/pci.h>
-#include <asm/hardware/it8152.h>
-
-#define MAX_SLOTS		21
-
-static void it8152_mask_irq(struct irq_data *d)
-{
-	unsigned int irq = d->irq;
-
-       if (irq >= IT8152_LD_IRQ(0)) {
-	       __raw_writel((__raw_readl(IT8152_INTC_LDCNIMR) |
-			    (1 << (irq - IT8152_LD_IRQ(0)))),
-			    IT8152_INTC_LDCNIMR);
-       } else if (irq >= IT8152_LP_IRQ(0)) {
-	       __raw_writel((__raw_readl(IT8152_INTC_LPCNIMR) |
-			    (1 << (irq - IT8152_LP_IRQ(0)))),
-			    IT8152_INTC_LPCNIMR);
-       } else if (irq >= IT8152_PD_IRQ(0)) {
-	       __raw_writel((__raw_readl(IT8152_INTC_PDCNIMR) |
-			    (1 << (irq - IT8152_PD_IRQ(0)))),
-			    IT8152_INTC_PDCNIMR);
-       }
-}
-
-static void it8152_unmask_irq(struct irq_data *d)
-{
-	unsigned int irq = d->irq;
-
-       if (irq >= IT8152_LD_IRQ(0)) {
-	       __raw_writel((__raw_readl(IT8152_INTC_LDCNIMR) &
-			     ~(1 << (irq - IT8152_LD_IRQ(0)))),
-			    IT8152_INTC_LDCNIMR);
-       } else if (irq >= IT8152_LP_IRQ(0)) {
-	       __raw_writel((__raw_readl(IT8152_INTC_LPCNIMR) &
-			     ~(1 << (irq - IT8152_LP_IRQ(0)))),
-			    IT8152_INTC_LPCNIMR);
-       } else if (irq >= IT8152_PD_IRQ(0)) {
-	       __raw_writel((__raw_readl(IT8152_INTC_PDCNIMR) &
-			     ~(1 << (irq - IT8152_PD_IRQ(0)))),
-			    IT8152_INTC_PDCNIMR);
-       }
-}
-
-static struct irq_chip it8152_irq_chip = {
-	.name		= "it8152",
-	.irq_ack	= it8152_mask_irq,
-	.irq_mask	= it8152_mask_irq,
-	.irq_unmask	= it8152_unmask_irq,
-};
-
-void it8152_init_irq(void)
-{
-	int irq;
-
-	__raw_writel((0xffff), IT8152_INTC_PDCNIMR);
-	__raw_writel((0), IT8152_INTC_PDCNIRR);
-	__raw_writel((0xffff), IT8152_INTC_LPCNIMR);
-	__raw_writel((0), IT8152_INTC_LPCNIRR);
-	__raw_writel((0xffff), IT8152_INTC_LDCNIMR);
-	__raw_writel((0), IT8152_INTC_LDCNIRR);
-
-	for (irq = IT8152_IRQ(0); irq <= IT8152_LAST_IRQ; irq++) {
-		irq_set_chip_and_handler(irq, &it8152_irq_chip,
-					 handle_level_irq);
-		irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
-	}
-}
-
-void it8152_irq_demux(struct irq_desc *desc)
-{
-       int bits_pd, bits_lp, bits_ld;
-       int i;
-
-       while (1) {
-	       /* Read all */
-	       bits_pd = __raw_readl(IT8152_INTC_PDCNIRR);
-	       bits_lp = __raw_readl(IT8152_INTC_LPCNIRR);
-	       bits_ld = __raw_readl(IT8152_INTC_LDCNIRR);
-
-	       /* Ack */
-	       __raw_writel((~bits_pd), IT8152_INTC_PDCNIRR);
-	       __raw_writel((~bits_lp), IT8152_INTC_LPCNIRR);
-	       __raw_writel((~bits_ld), IT8152_INTC_LDCNIRR);
-
-	       if (!(bits_ld | bits_lp | bits_pd)) {
-		       /* Re-read to guarantee, that there was a moment of
-			  time, when they all three were 0. */
-		       bits_pd = __raw_readl(IT8152_INTC_PDCNIRR);
-		       bits_lp = __raw_readl(IT8152_INTC_LPCNIRR);
-		       bits_ld = __raw_readl(IT8152_INTC_LDCNIRR);
-		       if (!(bits_ld | bits_lp | bits_pd))
-			       return;
-	       }
-
-	       bits_pd &= ((1 << IT8152_PD_IRQ_COUNT) - 1);
-	       while (bits_pd) {
-		       i = __ffs(bits_pd);
-		       generic_handle_irq(IT8152_PD_IRQ(i));
-		       bits_pd &= ~(1 << i);
-	       }
-
-	       bits_lp &= ((1 << IT8152_LP_IRQ_COUNT) - 1);
-	       while (bits_lp) {
-		       i = __ffs(bits_lp);
-		       generic_handle_irq(IT8152_LP_IRQ(i));
-		       bits_lp &= ~(1 << i);
-	       }
-
-	       bits_ld &= ((1 << IT8152_LD_IRQ_COUNT) - 1);
-	       while (bits_ld) {
-		       i = __ffs(bits_ld);
-		       generic_handle_irq(IT8152_LD_IRQ(i));
-		       bits_ld &= ~(1 << i);
-	       }
-       }
-}
-
-/* mapping for on-chip devices */
-int __init it8152_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-{
-	if ((dev->vendor == PCI_VENDOR_ID_ITE) &&
-	    (dev->device == PCI_DEVICE_ID_ITE_8152)) {
-		if ((dev->class >> 8) == PCI_CLASS_MULTIMEDIA_AUDIO)
-			return IT8152_AUDIO_INT;
-		if ((dev->class >> 8) == PCI_CLASS_SERIAL_USB)
-			return IT8152_USB_INT;
-		if ((dev->class >> 8) == PCI_CLASS_SYSTEM_DMA)
-			return IT8152_CDMA_INT;
-	}
-
-	return 0;
-}
-
-static unsigned long it8152_pci_dev_base_address(struct pci_bus *bus,
-						 unsigned int devfn)
-{
-	unsigned long addr = 0;
-
-	if (bus->number == 0) {
-			if (devfn < PCI_DEVFN(MAX_SLOTS, 0))
-				addr = (devfn << 8);
-	} else
-		addr = (bus->number << 16) | (devfn << 8);
-
-	return addr;
-}
-
-static int it8152_pci_read_config(struct pci_bus *bus,
-				  unsigned int devfn, int where,
-				  int size, u32 *value)
-{
-	unsigned long addr = it8152_pci_dev_base_address(bus, devfn);
-	u32 v;
-	int shift;
-
-	shift = (where & 3);
-
-	__raw_writel((addr + where), IT8152_PCI_CFG_ADDR);
-	v = (__raw_readl(IT8152_PCI_CFG_DATA)  >> (8 * (shift)));
-
-	*value = v;
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int it8152_pci_write_config(struct pci_bus *bus,
-				   unsigned int devfn, int where,
-				   int size, u32 value)
-{
-	unsigned long addr = it8152_pci_dev_base_address(bus, devfn);
-	u32 v, vtemp, mask = 0;
-	int shift;
-
-	if (size == 1)
-		mask = 0xff;
-	if (size == 2)
-		mask = 0xffff;
-
-	shift = (where & 3);
-
-	__raw_writel((addr + where), IT8152_PCI_CFG_ADDR);
-	vtemp = __raw_readl(IT8152_PCI_CFG_DATA);
-
-	if (mask)
-		vtemp &= ~(mask << (8 * shift));
-	else
-		vtemp = 0;
-
-	v = (value << (8 * shift));
-	__raw_writel((addr + where), IT8152_PCI_CFG_ADDR);
-	__raw_writel((v | vtemp), IT8152_PCI_CFG_DATA);
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-struct pci_ops it8152_ops = {
-	.read = it8152_pci_read_config,
-	.write = it8152_pci_write_config,
-};
-
-static struct resource it8152_io = {
-	.name	= "IT8152 PCI I/O region",
-	.flags	= IORESOURCE_IO,
-};
-
-static struct resource it8152_mem = {
-	.name	= "IT8152 PCI memory region",
-	.start	= 0x10000000,
-	.end	= 0x13e00000,
-	.flags	= IORESOURCE_MEM,
-};
-
-/*
- * The following functions are needed for DMA bouncing.
- * ITE8152 chip can address up to 64MByte, so all the devices
- * connected to ITE8152 (PCI and USB) should have limited DMA window
- */
-static int it8152_needs_bounce(struct device *dev, dma_addr_t dma_addr, size_t size)
-{
-	dev_dbg(dev, "%s: dma_addr %08x, size %08x\n",
-		__func__, dma_addr, size);
-	return (dma_addr + size - PHYS_OFFSET) >= SZ_64M;
-}
-
-/*
- * Setup DMA mask to 64MB on devices connected to ITE8152. Ignore all
- * other devices.
- */
-static int it8152_pci_platform_notify(struct device *dev)
-{
-	if (dev_is_pci(dev)) {
-		if (dev->dma_mask)
-			*dev->dma_mask = (SZ_64M - 1) | PHYS_OFFSET;
-		dev->coherent_dma_mask = (SZ_64M - 1) | PHYS_OFFSET;
-		dmabounce_register_dev(dev, 2048, 4096, it8152_needs_bounce);
-	}
-	return 0;
-}
-
-static int it8152_pci_platform_notify_remove(struct device *dev)
-{
-	if (dev_is_pci(dev))
-		dmabounce_unregister_dev(dev);
-
-	return 0;
-}
-
-int dma_set_coherent_mask(struct device *dev, u64 mask)
-{
-	if (mask >= PHYS_OFFSET + SZ_64M - 1)
-		return 0;
-
-	return -EIO;
-}
-
-int __init it8152_pci_setup(int nr, struct pci_sys_data *sys)
-{
-	/*
-	 * FIXME: use pci_ioremap_io to remap the IO space here and
-	 * move over to the generic io.h implementation.
-	 * This requires solving the same problem for PXA PCMCIA
-	 * support.
-	 */
-	it8152_io.start = (unsigned long)IT8152_IO_BASE + 0x12000;
-	it8152_io.end	= (unsigned long)IT8152_IO_BASE + 0x12000 + 0x100000;
-
-	sys->mem_offset = 0x10000000;
-	sys->io_offset  = (unsigned long)IT8152_IO_BASE;
-
-	if (request_resource(&ioport_resource, &it8152_io)) {
-		printk(KERN_ERR "PCI: unable to allocate IO region\n");
-		goto err0;
-	}
-	if (request_resource(&iomem_resource, &it8152_mem)) {
-		printk(KERN_ERR "PCI: unable to allocate memory region\n");
-		goto err1;
-	}
-
-	pci_add_resource_offset(&sys->resources, &it8152_io, sys->io_offset);
-	pci_add_resource_offset(&sys->resources, &it8152_mem, sys->mem_offset);
-
-	if (platform_notify || platform_notify_remove) {
-		printk(KERN_ERR "PCI: Can't use platform_notify\n");
-		goto err2;
-	}
-
-	platform_notify = it8152_pci_platform_notify;
-	platform_notify_remove = it8152_pci_platform_notify_remove;
-
-	return 1;
-
-err2:
-	release_resource(&it8152_io);
-err1:
-	release_resource(&it8152_mem);
-err0:
-	return -EBUSY;
-}
-
-/* ITE bridge requires setting latency timer to avoid early bus access
-   termination by PCI bus master devices
-*/
-void pcibios_set_master(struct pci_dev *dev)
-{
-	u8 lat;
-
-	/* no need to update on-chip OHCI controller */
-	if ((dev->vendor == PCI_VENDOR_ID_ITE) &&
-	    (dev->device == PCI_DEVICE_ID_ITE_8152) &&
-	    ((dev->class >> 8) == PCI_CLASS_SERIAL_USB))
-		return;
-
-	pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
-	if (lat < 16)
-		lat = (64 <= pcibios_max_latency) ? 64 : pcibios_max_latency;
-	else if (lat > pcibios_max_latency)
-		lat = pcibios_max_latency;
-	else
-		return;
-	printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n",
-	       pci_name(dev), lat);
-	pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
-}
-
-
-EXPORT_SYMBOL(dma_set_coherent_mask);

arch/arm/include/asm/hardware/it8152.h

-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * linux/include/arm/hardware/it8152.h
- *
- * Copyright Compulab Ltd., 2006,2007
- * Mike Rapoport <mike@compulab.co.il>
- *
- * ITE 8152 companion chip register definitions
- */
-
-#ifndef __ASM_HARDWARE_IT8152_H
-#define __ASM_HARDWARE_IT8152_H
-
-#include <mach/irqs.h>
-
-extern void __iomem *it8152_base_address;
-
-#define IT8152_IO_BASE			(it8152_base_address + 0x03e00000)
-#define IT8152_CFGREG_BASE		(it8152_base_address + 0x03f00000)
-
-#define __REG_IT8152(x)			(it8152_base_address + (x))
-
-#define IT8152_PCI_CFG_ADDR		__REG_IT8152(0x3f00800)
-#define IT8152_PCI_CFG_DATA		__REG_IT8152(0x3f00804)
-
-#define IT8152_INTC_LDCNIRR		__REG_IT8152(0x3f00300)
-#define IT8152_INTC_LDPNIRR		__REG_IT8152(0x3f00304)
-#define IT8152_INTC_LDCNIMR		__REG_IT8152(0x3f00308)
-#define IT8152_INTC_LDPNIMR		__REG_IT8152(0x3f0030C)
-#define IT8152_INTC_LDNITR		__REG_IT8152(0x3f00310)
-#define IT8152_INTC_LDNIAR		__REG_IT8152(0x3f00314)
-#define IT8152_INTC_LPCNIRR		__REG_IT8152(0x3f00320)
-#define IT8152_INTC_LPPNIRR		__REG_IT8152(0x3f00324)
-#define IT8152_INTC_LPCNIMR		__REG_IT8152(0x3f00328)
-#define IT8152_INTC_LPPNIMR		__REG_IT8152(0x3f0032C)
-#define IT8152_INTC_LPNITR		__REG_IT8152(0x3f00330)
-#define IT8152_INTC_LPNIAR		__REG_IT8152(0x3f00334)
-#define IT8152_INTC_PDCNIRR		__REG_IT8152(0x3f00340)
-#define IT8152_INTC_PDPNIRR		__REG_IT8152(0x3f00344)
-#define IT8152_INTC_PDCNIMR		__REG_IT8152(0x3f00348)
-#define IT8152_INTC_PDPNIMR		__REG_IT8152(0x3f0034C)
-#define IT8152_INTC_PDNITR		__REG_IT8152(0x3f00350)
-#define IT8152_INTC_PDNIAR		__REG_IT8152(0x3f00354)
-#define IT8152_INTC_INTC_TYPER		__REG_IT8152(0x3f003FC)
-
-#define IT8152_GPIO_GPDR		__REG_IT8152(0x3f00500)
-
-/*
-  Interrupt controller per register summary:
-  ---------------------------------------
-  LCDNIRR:
-  IT8152_LD_IRQ(8) PCICLK stop
-  IT8152_LD_IRQ(7) MCLK ready
-  IT8152_LD_IRQ(6) s/w
-  IT8152_LD_IRQ(5) UART
-  IT8152_LD_IRQ(4) GPIO
-  IT8152_LD_IRQ(3) TIMER 4
-  IT8152_LD_IRQ(2) TIMER 3
-  IT8152_LD_IRQ(1) TIMER 2
-  IT8152_LD_IRQ(0) TIMER 1
-
-  LPCNIRR:
-  IT8152_LP_IRQ(x) serial IRQ x
-
-  PCIDNIRR:
-  IT8152_PD_IRQ(14) PCISERR
-  IT8152_PD_IRQ(13) CPU/PCI bridge target abort (h2pTADR)
-  IT8152_PD_IRQ(12) CPU/PCI bridge master abort (h2pMADR)
-  IT8152_PD_IRQ(11) PCI INTD
-  IT8152_PD_IRQ(10) PCI INTC
-  IT8152_PD_IRQ(9)  PCI INTB
-  IT8152_PD_IRQ(8)  PCI INTA
-  IT8152_PD_IRQ(7)  serial INTD
-  IT8152_PD_IRQ(6)  serial INTC
-  IT8152_PD_IRQ(5)  serial INTB
-  IT8152_PD_IRQ(4)  serial INTA
-  IT8152_PD_IRQ(3)  serial IRQ IOCHK (IOCHKR)
-  IT8152_PD_IRQ(2)  chaining DMA (CDMAR)
-  IT8152_PD_IRQ(1)  USB (USBR)
-  IT8152_PD_IRQ(0)  Audio controller (ACR)
- */
-#define IT8152_IRQ(x)   (IRQ_BOARD_START + (x))
-#define IT8152_LAST_IRQ	(IRQ_BOARD_START + 40)
-
-/* IRQ-sources in 3 groups - local devices, LPC (serial), and external PCI */
-#define IT8152_LD_IRQ_COUNT     9
-#define IT8152_LP_IRQ_COUNT     16
-#define IT8152_PD_IRQ_COUNT     15
-
-/* Priorities: */
-#define IT8152_PD_IRQ(i)        IT8152_IRQ(i)
-#define IT8152_LP_IRQ(i)        (IT8152_IRQ(i) + IT8152_PD_IRQ_COUNT)
-#define IT8152_LD_IRQ(i)        (IT8152_IRQ(i) + IT8152_PD_IRQ_COUNT + IT8152_LP_IRQ_COUNT)
-
-/* frequently used interrupts */
-#define IT8152_PCISERR		IT8152_PD_IRQ(14)
-#define IT8152_H2PTADR		IT8152_PD_IRQ(13)
-#define IT8152_H2PMAR		IT8152_PD_IRQ(12)
-#define IT8152_PCI_INTD		IT8152_PD_IRQ(11)
-#define IT8152_PCI_INTC		IT8152_PD_IRQ(10)
-#define IT8152_PCI_INTB		IT8152_PD_IRQ(9)
-#define IT8152_PCI_INTA		IT8152_PD_IRQ(8)
-#define IT8152_CDMA_INT		IT8152_PD_IRQ(2)
-#define IT8152_USB_INT		IT8152_PD_IRQ(1)
-#define IT8152_AUDIO_INT	IT8152_PD_IRQ(0)
-
-struct pci_dev;
-struct pci_sys_data;
-
-extern void it8152_irq_demux(struct irq_desc *desc);
-extern void it8152_init_irq(void);
-extern int it8152_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
-extern int it8152_pci_setup(int nr, struct pci_sys_data *sys);
-extern struct pci_ops it8152_ops;
-
-#endif /* __ASM_HARDWARE_IT8152_H */

arch/arm/include/asm/uaccess.h

@@ -78,7 +78,11 @@ static inline void set_fs(mm_segment_t fs)
 
 #define segment_eq(a, b)	((a) == (b))
 
-/* We use 33-bit arithmetic here... */
+/*
+ * We use 33-bit arithmetic here.  Success returns zero, failure returns
+ * addr_limit.  We take advantage that addr_limit will be zero for KERNEL_DS,
+ * so this will always return success in that case.
+ */
 #define __range_ok(addr, size) ({ \
 	unsigned long flag, roksum; \
 	__chk_user_ptr(addr);	\

arch/arm/include/asm/vfp.h

@@ -9,6 +9,7 @@
 #ifndef __ASM_VFP_H
 #define __ASM_VFP_H
 
+#ifndef CONFIG_AS_VFP_VMRS_FPINST
 #define FPSID			cr0
 #define FPSCR			cr1
 #define MVFR1			cr6
@@ -16,6 +17,7 @@
 #define FPEXC			cr8
 #define FPINST			cr9
 #define FPINST2			cr10
+#endif
 
 /* FPSID bits */
 #define FPSID_IMPLEMENTER_BIT	(24)

arch/arm/include/asm/vfpmacros.h

@@ -8,7 +8,16 @@
 
 #include <asm/vfp.h>
 
-@ Macros to allow building with old toolkits (with no VFP support)
+#ifdef CONFIG_AS_VFP_VMRS_FPINST
+	.macro	VFPFMRX, rd, sysreg, cond
+	vmrs\cond	\rd, \sysreg
+	.endm
+
+	.macro	VFPFMXR, sysreg, rd, cond
+	vmsr\cond	\sysreg, \rd
+	.endm
+#else
+	@ Macros to allow building with old toolkits (with no VFP support)
 	.macro	VFPFMRX, rd, sysreg, cond
 	MRC\cond	p10, 7, \rd, \sysreg, cr0, 0	@ FMRX	\rd, \sysreg
 	.endm
@@ -16,26 +25,29 @@
 	.macro	VFPFMXR, sysreg, rd, cond
 	MCR\cond	p10, 7, \rd, \sysreg, cr0, 0	@ FMXR	\sysreg, \rd
 	.endm
+#endif
 
 	@ read all the working registers back into the VFP
 	.macro	VFPFLDMIA, base, tmp
+	.fpu	vfpv2
 #if __LINUX_ARM_ARCH__ < 6
-	LDC	p11, cr0, [\base],#33*4		    @ FLDMIAX \base!, {d0-d15}
+	fldmiax	\base!, {d0-d15}
 #else
-	LDC	p11, cr0, [\base],#32*4		    @ FLDMIAD \base!, {d0-d15}
+	vldmia	\base!, {d0-d15}
 #endif
 #ifdef CONFIG_VFPv3
+	.fpu	vfpv3
 #if __LINUX_ARM_ARCH__ <= 6
 	ldr	\tmp, =elf_hwcap		    @ may not have MVFR regs
 	ldr	\tmp, [\tmp, #0]
 	tst	\tmp, #HWCAP_VFPD32
-	ldclne	p11, cr0, [\base],#32*4		    @ FLDMIAD \base!, {d16-d31}
+	vldmiane \base!, {d16-d31}
 	addeq	\base, \base, #32*4		    @ step over unused register space
 #else
 	VFPFMRX	\tmp, MVFR0			    @ Media and VFP Feature Register 0
 	and	\tmp, \tmp, #MVFR0_A_SIMD_MASK	    @ A_SIMD field
 	cmp	\tmp, #2			    @ 32 x 64bit registers?
-	ldcleq	p11, cr0, [\base],#32*4		    @ FLDMIAD \base!, {d16-d31}
+	vldmiaeq \base!, {d16-d31}
 	addne	\base, \base, #32*4		    @ step over unused register space
 #endif
 #endif
@@ -44,22 +56,23 @@
 	@ write all the working registers out of the VFP
 	.macro	VFPFSTMIA, base, tmp
 #if __LINUX_ARM_ARCH__ < 6
-	STC	p11, cr0, [\base],#33*4		    @ FSTMIAX \base!, {d0-d15}
+	fstmiax	\base!, {d0-d15}
 #else
-	STC	p11, cr0, [\base],#32*4		    @ FSTMIAD \base!, {d0-d15}
+	vstmia	\base!, {d0-d15}
 #endif
 #ifdef CONFIG_VFPv3
+	.fpu	vfpv3
 #if __LINUX_ARM_ARCH__ <= 6
 	ldr	\tmp, =elf_hwcap		    @ may not have MVFR regs
 	ldr	\tmp, [\tmp, #0]
 	tst	\tmp, #HWCAP_VFPD32
-	stclne	p11, cr0, [\base],#32*4		    @ FSTMIAD \base!, {d16-d31}
+	vstmiane \base!, {d16-d31}
 	addeq	\base, \base, #32*4		    @ step over unused register space
 #else
 	VFPFMRX	\tmp, MVFR0			    @ Media and VFP Feature Register 0
 	and	\tmp, \tmp, #MVFR0_A_SIMD_MASK	    @ A_SIMD field
 	cmp	\tmp, #2			    @ 32 x 64bit registers?
-	stcleq	p11, cr0, [\base],#32*4		    @ FSTMIAD \base!, {d16-d31}
+	vstmiaeq \base!, {d16-d31}
 	addne	\base, \base, #32*4		    @ step over unused register space
 #endif
 #endif

arch/arm/kernel/bios32.c

@@ -252,23 +252,6 @@ static void pci_fixup_cy82c693(struct pci_dev *dev)
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CONTAQ, PCI_DEVICE_ID_CONTAQ_82C693, pci_fixup_cy82c693);
 
-static void pci_fixup_it8152(struct pci_dev *dev)
-{
-	int i;
-	/* fixup for ITE 8152 devices */
-	/* FIXME: add defines for class 0x68000 and 0x80103 */
-	if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST ||
-	    dev->class == 0x68000 ||
-	    dev->class == 0x80103) {
-		for (i = 0; i < PCI_NUM_RESOURCES; i++) {
-			dev->resource[i].start = 0;
-			dev->resource[i].end   = 0;
-			dev->resource[i].flags = 0;
-		}
-	}
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8152, pci_fixup_it8152);
-
 /*
  * If the bus contains any of these devices, then we must not turn on
  * parity checking of any kind.  Currently this is CyberPro 20x0 only.

arch/arm/kernel/stacktrace.c

@@ -22,6 +22,19 @@
  * A simple function epilogue looks like this:
  *	ldm	sp, {fp, sp, pc}
  *
+ * When compiled with clang, pc and sp are not pushed. A simple function
+ * prologue looks like this when built with clang:
+ *
+ *	stmdb	{..., fp, lr}
+ *	add	fp, sp, #x
+ *	sub	sp, sp, #y
+ *
+ * A simple function epilogue looks like this when built with clang:
+ *
+ *	sub	sp, fp, #x
+ *	ldm	{..., fp, pc}
+ *
+ *
  * Note that with framepointer enabled, even the leaf functions have the same
  * prologue and epilogue, therefore we can ignore the LR value in this case.
  */
@@ -34,6 +47,16 @@ int notrace unwind_frame(struct stackframe *frame)
 	low = frame->sp;
 	high = ALIGN(low, THREAD_SIZE);
 
+#ifdef CONFIG_CC_IS_CLANG
+	/* check current frame pointer is within bounds */
+	if (fp < low + 4 || fp > high - 4)
+		return -EINVAL;
+
+	frame->sp = frame->fp;
+	frame->fp = *(unsigned long *)(fp);
+	frame->pc = frame->lr;
+	frame->lr = *(unsigned long *)(fp + 4);
+#else
 	/* check current frame pointer is within bounds */
 	if (fp < low + 12 || fp > high - 4)
 		return -EINVAL;
@@ -42,6 +65,7 @@ int notrace unwind_frame(struct stackframe *frame)
 	frame->fp = *(unsigned long *)(fp - 12);
 	frame->sp = *(unsigned long *)(fp - 8);
 	frame->pc = *(unsigned long *)(fp - 4);
+#endif
 
 	return 0;
 }

arch/arm/mm/mmu.c

@@ -74,8 +74,6 @@ struct cachepolicy {
 	pteval_t	pte;
 };
 
-unsigned long kimage_voffset __ro_after_init;
-
 static struct cachepolicy cache_policies[] __initdata = {
 	{
 		.policy		= "uncached",
@@ -1654,9 +1652,6 @@ void __init paging_init(const struct machine_desc *mdesc)
 
 	empty_zero_page = virt_to_page(zero_page);
 	__flush_dcache_page(NULL, empty_zero_page);
-
-	/* Compute the virt/idmap offset, mostly for the sake of KVM */
-	kimage_voffset = (unsigned long)&kimage_voffset - virt_to_idmap(&kimage_voffset);
 }
 
 void __init early_mm_init(const struct machine_desc *mdesc)

arch/arm/mm/proc-macros.S

@@ -5,7 +5,6 @@
  *  VMA_VM_FLAGS
  *  VM_EXEC
  */
-#include <linux/const.h>
 #include <asm/asm-offsets.h>
 #include <asm/thread_info.h>
 
@@ -31,8 +30,7 @@
  * act_mm - get current->active_mm
  */
 	.macro	act_mm, rd
-	bic	\rd, sp, #(THREAD_SIZE - 1) & ~63
-	bic	\rd, \rd, #63
+	get_thread_info \rd
 	ldr	\rd, [\rd, #TI_TASK]
 	.if (TSK_ACTIVE_MM > IMM12_MASK)
 	add	\rd, \rd, #TSK_ACTIVE_MM & ~IMM12_MASK

arch/arm/vfp/Makefile

@@ -8,6 +8,4 @@
 # ccflags-y := -DDEBUG
 # asflags-y := -DDEBUG
 
-KBUILD_AFLAGS	:=$(KBUILD_AFLAGS:-msoft-float=-Wa,-mfpu=softvfp+vfp -mfloat-abi=soft)
-
 obj-y		+= vfpmodule.o entry.o vfphw.o vfpsingle.o vfpdouble.o

arch/arm/vfp/vfphw.S

@@ -78,6 +78,7 @@
 ENTRY(vfp_support_entry)
 	DBGSTR3	"instr %08x pc %08x state %p", r0, r2, r10
 
+	.fpu	vfpv2
 	ldr	r3, [sp, #S_PSR]	@ Neither lazy restore nor FP exceptions
 	and	r3, r3, #MODE_MASK	@ are supported in kernel mode
 	teq	r3, #USR_MODE
@@ -258,11 +259,14 @@ vfp_current_hw_state_address:
 
 ENTRY(vfp_get_float)
 	tbl_branch r0, r3, #3
+	.fpu	vfpv2
 	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-1:	mrc	p10, 0, r0, c\dr, c0, 0	@ fmrs	r0, s0
+1:	vmov	r0, s\dr
 	ret	lr
 	.org	1b + 8
-1:	mrc	p10, 0, r0, c\dr, c0, 4	@ fmrs	r0, s1
+	.endr
+	.irp	dr,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
+1:	vmov	r0, s\dr
 	ret	lr
 	.org	1b + 8
 	.endr
@@ -270,11 +274,14 @@ ENDPROC(vfp_get_float)
 
 ENTRY(vfp_put_float)
 	tbl_branch r1, r3, #3
+	.fpu	vfpv2
 	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-1:	mcr	p10, 0, r0, c\dr, c0, 0	@ fmsr	r0, s0
+1:	vmov	s\dr, r0
 	ret	lr
 	.org	1b + 8
-1:	mcr	p10, 0, r0, c\dr, c0, 4	@ fmsr	r0, s1
+	.endr
+	.irp	dr,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
+1:	vmov	s\dr, r0
 	ret	lr
 	.org	1b + 8
 	.endr
@@ -282,15 +289,17 @@ ENDPROC(vfp_put_float)
 
 ENTRY(vfp_get_double)
 	tbl_branch r0, r3, #3
+	.fpu	vfpv2
 	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-1:	fmrrd	r0, r1, d\dr
+1:	vmov	r0, r1, d\dr
 	ret	lr
 	.org	1b + 8
 	.endr
 #ifdef CONFIG_VFPv3
 	@ d16 - d31 registers
-	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-1:	mrrc	p11, 3, r0, r1, c\dr	@ fmrrd	r0, r1, d\dr
+	.fpu	vfpv3
+	.irp	dr,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
+1:	vmov	r0, r1, d\dr
 	ret	lr
 	.org	1b + 8
 	.endr
@@ -304,15 +313,17 @@ ENDPROC(vfp_get_double)
 
 ENTRY(vfp_put_double)
 	tbl_branch r2, r3, #3
+	.fpu	vfpv2
 	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-1:	fmdrr	d\dr, r0, r1
+1:	vmov	d\dr, r0, r1
 	ret	lr
 	.org	1b + 8
 	.endr
 #ifdef CONFIG_VFPv3
+	.fpu	vfpv3
 	@ d16 - d31 registers
-	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
-1:	mcrr	p11, 3, r0, r1, c\dr	@ fmdrr	r0, r1, d\dr
+	.irp	dr,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
+1:	vmov	d\dr, r0, r1
 	ret	lr
 	.org	1b + 8
 	.endr

arch/arm/vfp/vfpinstr.h

@@ -62,10 +62,23 @@
 #define FPSCR_C (1 << 29)
 #define FPSCR_V	(1 << 28)
 
-/*
- * Since we aren't building with -mfpu=vfp, we need to code
- * these instructions using their MRC/MCR equivalents.
- */
+#ifdef CONFIG_AS_VFP_VMRS_FPINST
+
+#define fmrx(_vfp_) ({			\
+	u32 __v;			\
+	asm(".fpu	vfpv2\n"	\
+	    "vmrs	%0, " #_vfp_	\
+	    : "=r" (__v) : : "cc");	\
+	__v;				\
+ })
+
+#define fmxr(_vfp_,_var_)		\
+	asm(".fpu	vfpv2\n"	\
+	    "vmsr	" #_vfp_ ", %0"	\
+	   : : "r" (_var_) : "cc")
+
+#else
+
 #define vfpreg(_vfp_) #_vfp_
 
 #define fmrx(_vfp_) ({			\
@@ -79,6 +92,8 @@
 	asm("mcr p10, 7, %0, " vfpreg(_vfp_) ", cr0, 0 @ fmxr	" #_vfp_ ", %0"	\
 	   : : "r" (_var_) : "cc")
 
+#endif
+
 u32 vfp_single_cpdo(u32 inst, u32 fpscr);
 u32 vfp_single_cprt(u32 inst, u32 fpscr, struct pt_regs *regs);