Merge branch 'linus' into tracing/hw-breakpoints

Conflicts:
	arch/x86/kernel/process_64.c

Semantic conflict fixed in:
	arch/x86/kvm/x86.c

Signed-off-by: Ingo Molnar <mingo@elte.hu>

11 files changed, 179 insertions, 42 deletions

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 83c025e72ce..5fe595aeba6 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -758,7 +758,7 @@ config CACHE_FEROCEON_L2_WRITETHROUGH
 config CACHE_L2X0
 	bool "Enable the L2x0 outer cache controller"
 	depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || MACH_REALVIEW_PB1176 || \
-		   REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX
+		   REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX || ARCH_NOMADIK
 	default y
 	select OUTER_CACHE
 	help
diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c
index 03cd27d917b..b270d6228fe 100644
--- a/arch/arm/mm/alignment.c
+++ b/arch/arm/mm/alignment.c
@@ -159,7 +159,9 @@ union offset_union {
 
 #define __get8_unaligned_check(ins,val,addr,err)	\
 	__asm__(					\
-	"1:	"ins"	%1, [%2], #1\n"			\
+ ARM(	"1:	"ins"	%1, [%2], #1\n"	)		\
+ THUMB(	"1:	"ins"	%1, [%2]\n"	)		\
+ THUMB(	"	add	%2, %2, #1\n"	)		\
 	"2:\n"						\
 	"	.section .fixup,\"ax\"\n"		\
 	"	.align	2\n"				\
@@ -215,7 +217,9 @@ union offset_union {
 	do {							\
 		unsigned int err = 0, v = val, a = addr;	\
 		__asm__( FIRST_BYTE_16				\
-		"1:	"ins"	%1, [%2], #1\n"			\
+	 ARM(	"1:	"ins"	%1, [%2], #1\n"	)		\
+	 THUMB(	"1:	"ins"	%1, [%2]\n"	)		\
+	 THUMB(	"	add	%2, %2, #1\n"	)		\
 		"	mov	%1, %1, "NEXT_BYTE"\n"		\
 		"2:	"ins"	%1, [%2]\n"			\
 		"3:\n"						\
@@ -245,11 +249,17 @@ union offset_union {
 	do {							\
 		unsigned int err = 0, v = val, a = addr;	\
 		__asm__( FIRST_BYTE_32				\
-		"1:	"ins"	%1, [%2], #1\n"			\
+	 ARM(	"1:	"ins"	%1, [%2], #1\n"	)		\
+	 THUMB(	"1:	"ins"	%1, [%2]\n"	)		\
+	 THUMB(	"	add	%2, %2, #1\n"	)		\
 		"	mov	%1, %1, "NEXT_BYTE"\n"		\
-		"2:	"ins"	%1, [%2], #1\n"			\
+	 ARM(	"2:	"ins"	%1, [%2], #1\n"	)		\
+	 THUMB(	"2:	"ins"	%1, [%2]\n"	)		\
+	 THUMB(	"	add	%2, %2, #1\n"	)		\
 		"	mov	%1, %1, "NEXT_BYTE"\n"		\
-		"3:	"ins"	%1, [%2], #1\n"			\
+	 ARM(	"3:	"ins"	%1, [%2], #1\n"	)		\
+	 THUMB(	"3:	"ins"	%1, [%2]\n"	)		\
+	 THUMB(	"	add	%2, %2, #1\n"	)		\
 		"	mov	%1, %1, "NEXT_BYTE"\n"		\
 		"4:	"ins"	%1, [%2]\n"			\
 		"5:\n"						\
diff --git a/arch/arm/mm/cache-v7.S b/arch/arm/mm/cache-v7.S
index be93ff02a98..bda0ec31a4e 100644
--- a/arch/arm/mm/cache-v7.S
+++ b/arch/arm/mm/cache-v7.S
@@ -21,7 +21,7 @@
  *
  *	Flush the whole D-cache.
  *
- *	Corrupted registers: r0-r5, r7, r9-r11
+ *	Corrupted registers: r0-r7, r9-r11 (r6 only in Thumb mode)
  *
  *	- mm    - mm_struct describing address space
  */
@@ -51,8 +51,12 @@ loop1:
 loop2:
 	mov	r9, r4				@ create working copy of max way size
 loop3:
-	orr	r11, r10, r9, lsl r5		@ factor way and cache number into r11
-	orr	r11, r11, r7, lsl r2		@ factor index number into r11
+ ARM(	orr	r11, r10, r9, lsl r5	)	@ factor way and cache number into r11
+ THUMB(	lsl	r6, r9, r5		)
+ THUMB(	orr	r11, r10, r6		)	@ factor way and cache number into r11
+ ARM(	orr	r11, r11, r7, lsl r2	)	@ factor index number into r11
+ THUMB(	lsl	r6, r7, r2		)
+ THUMB(	orr	r11, r11, r6		)	@ factor index number into r11
 	mcr	p15, 0, r11, c7, c14, 2		@ clean & invalidate by set/way
 	subs	r9, r9, #1			@ decrement the way
 	bge	loop3
@@ -82,11 +86,13 @@ ENDPROC(v7_flush_dcache_all)
  *
  */
 ENTRY(v7_flush_kern_cache_all)
-	stmfd	sp!, {r4-r5, r7, r9-r11, lr}
+ ARM(	stmfd	sp!, {r4-r5, r7, r9-r11, lr}	)
+ THUMB(	stmfd	sp!, {r4-r7, r9-r11, lr}	)
 	bl	v7_flush_dcache_all
 	mov	r0, #0
 	mcr	p15, 0, r0, c7, c5, 0		@ I+BTB cache invalidate
-	ldmfd	sp!, {r4-r5, r7, r9-r11, lr}
+ ARM(	ldmfd	sp!, {r4-r5, r7, r9-r11, lr}	)
+ THUMB(	ldmfd	sp!, {r4-r7, r9-r11, lr}	)
 	mov	pc, lr
 ENDPROC(v7_flush_kern_cache_all)
 
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 510c179b0ac..b30925fcbcd 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -36,7 +36,34 @@
 #define CONSISTENT_PTE_INDEX(x) (((unsigned long)(x) - CONSISTENT_BASE) >> PGDIR_SHIFT)
 #define NUM_CONSISTENT_PTES (CONSISTENT_DMA_SIZE >> PGDIR_SHIFT)
 
+static u64 get_coherent_dma_mask(struct device *dev)
+{
+	u64 mask = ISA_DMA_THRESHOLD;
+
+	if (dev) {
+		mask = dev->coherent_dma_mask;
+
+		/*
+		 * Sanity check the DMA mask - it must be non-zero, and
+		 * must be able to be satisfied by a DMA allocation.
+		 */
+		if (mask == 0) {
+			dev_warn(dev, "coherent DMA mask is unset\n");
+			return 0;
+		}
+
+		if ((~mask) & ISA_DMA_THRESHOLD) {
+			dev_warn(dev, "coherent DMA mask %#llx is smaller "
+				 "than system GFP_DMA mask %#llx\n",
+				 mask, (unsigned long long)ISA_DMA_THRESHOLD);
+			return 0;
+		}
+	}
 
+	return mask;
+}
+
+#ifdef CONFIG_MMU
 /*
  * These are the page tables (2MB each) covering uncached, DMA consistent allocations
  */
@@ -152,7 +179,8 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
 	struct page *page;
 	struct arm_vm_region *c;
 	unsigned long order;
-	u64 mask = ISA_DMA_THRESHOLD, limit;
+	u64 mask = get_coherent_dma_mask(dev);
+	u64 limit;
 
 	if (!consistent_pte[0]) {
 		printk(KERN_ERR "%s: not initialised\n", __func__);
@@ -160,25 +188,8 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
 		return NULL;
 	}
 
-	if (dev) {
-		mask = dev->coherent_dma_mask;
-
-		/*
-		 * Sanity check the DMA mask - it must be non-zero, and
-		 * must be able to be satisfied by a DMA allocation.
-		 */
-		if (mask == 0) {
-			dev_warn(dev, "coherent DMA mask is unset\n");
-			goto no_page;
-		}
-
-		if ((~mask) & ISA_DMA_THRESHOLD) {
-			dev_warn(dev, "coherent DMA mask %#llx is smaller "
-				 "than system GFP_DMA mask %#llx\n",
-				 mask, (unsigned long long)ISA_DMA_THRESHOLD);
-			goto no_page;
-		}
-	}
+	if (!mask)
+		goto no_page;
 
 	/*
 	 * Sanity check the allocation size.
@@ -267,6 +278,31 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
 	*handle = ~0;
 	return NULL;
 }
+#else	/* !CONFIG_MMU */
+static void *
+__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
+	    pgprot_t prot)
+{
+	void *virt;
+	u64 mask = get_coherent_dma_mask(dev);
+
+	if (!mask)
+		goto error;
+
+	if (mask != 0xffffffff)
+		gfp |= GFP_DMA;
+	virt = kmalloc(size, gfp);
+	if (!virt)
+		goto error;
+
+	*handle =  virt_to_dma(dev, virt);
+	return virt;
+
+error:
+	*handle = ~0;
+	return NULL;
+}
+#endif	/* CONFIG_MMU */
 
 /*
  * Allocate DMA-coherent memory space and return both the kernel remapped
@@ -311,9 +347,10 @@ EXPORT_SYMBOL(dma_alloc_writecombine);
 static int dma_mmap(struct device *dev, struct vm_area_struct *vma,
 		    void *cpu_addr, dma_addr_t dma_addr, size_t size)
 {
+	int ret = -ENXIO;
+#ifdef CONFIG_MMU
 	unsigned long flags, user_size, kern_size;
 	struct arm_vm_region *c;
-	int ret = -ENXIO;
 
 	user_size = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 
@@ -334,6 +371,7 @@ static int dma_mmap(struct device *dev, struct vm_area_struct *vma,
 					      vma->vm_page_prot);
 		}
 	}
+#endif	/* CONFIG_MMU */
 
 	return ret;
 }
@@ -358,6 +396,7 @@ EXPORT_SYMBOL(dma_mmap_writecombine);
  * free a page as defined by the above mapping.
  * Must not be called with IRQs disabled.
  */
+#ifdef CONFIG_MMU
 void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr_t handle)
 {
 	struct arm_vm_region *c;
@@ -444,6 +483,14 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr
 	       __func__, cpu_addr);
 	dump_stack();
 }
+#else	/* !CONFIG_MMU */
+void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, dma_addr_t handle)
+{
+	if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
+		return;
+	kfree(cpu_addr);
+}
+#endif	/* CONFIG_MMU */
 EXPORT_SYMBOL(dma_free_coherent);
 
 /*
@@ -451,10 +498,12 @@ EXPORT_SYMBOL(dma_free_coherent);
  */
 static int __init consistent_init(void)
 {
+	int ret = 0;
+#ifdef CONFIG_MMU
 	pgd_t *pgd;
 	pmd_t *pmd;
 	pte_t *pte;
-	int ret = 0, i = 0;
+	int i = 0;
 	u32 base = CONSISTENT_BASE;
 
 	do {
@@ -477,6 +526,7 @@ static int __init consistent_init(void)
 		consistent_pte[i++] = pte;
 		base += (1 << PGDIR_SHIFT);
 	} while (base < CONSISTENT_END);
+#endif	/* !CONFIG_MMU */
 
 	return ret;
 }
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 6fdcbb70982..cc8829d7e11 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -16,6 +16,8 @@
 #include <linux/kprobes.h>
 #include <linux/uaccess.h>
 #include <linux/page-flags.h>
+#include <linux/sched.h>
+#include <linux/highmem.h>
 
 #include <asm/system.h>
 #include <asm/pgtable.h>
@@ -23,6 +25,7 @@
 
 #include "fault.h"
 
+#ifdef CONFIG_MMU
 
 #ifdef CONFIG_KPROBES
 static inline int notify_page_fault(struct pt_regs *regs, unsigned int fsr)
@@ -97,6 +100,10 @@ void show_pte(struct mm_struct *mm, unsigned long addr)
 
 	printk("\n");
 }
+#else					/* CONFIG_MMU */
+void show_pte(struct mm_struct *mm, unsigned long addr)
+{ }
+#endif					/* CONFIG_MMU */
 
 /*
  * Oops.  The kernel tried to access some page that wasn't present.
@@ -171,6 +178,7 @@ void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 		__do_kernel_fault(mm, addr, fsr, regs);
 }
 
+#ifdef CONFIG_MMU
 #define VM_FAULT_BADMAP		0x010000
 #define VM_FAULT_BADACCESS	0x020000
 
@@ -322,6 +330,13 @@ no_context:
 	__do_kernel_fault(mm, addr, fsr, regs);
 	return 0;
 }
+#else					/* CONFIG_MMU */
+static int
+do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
+{
+	return 0;
+}
+#endif					/* CONFIG_MMU */
 
 /*
  * First Level Translation Fault Handler
@@ -340,6 +355,7 @@ no_context:
  * interrupt or a critical region, and should only copy the information
  * from the master page table, nothing more.
  */
+#ifdef CONFIG_MMU
 static int __kprobes
 do_translation_fault(unsigned long addr, unsigned int fsr,
 		     struct pt_regs *regs)
@@ -378,6 +394,14 @@ bad_area:
 	do_bad_area(addr, fsr, regs);
 	return 0;
 }
+#else					/* CONFIG_MMU */
+static int
+do_translation_fault(unsigned long addr, unsigned int fsr,
+		     struct pt_regs *regs)
+{
+	return 0;
+}
+#endif					/* CONFIG_MMU */
 
 /*
  * Some section permission faults need to be handled gracefully.
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index c07222eb5ce..575f3ad722e 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -144,7 +144,14 @@ void __flush_dcache_page(struct address_space *mapping, struct page *page)
 	 * page.  This ensures that data in the physical page is mutually
 	 * coherent with the kernels mapping.
 	 */
-	__cpuc_flush_dcache_page(page_address(page));
+#ifdef CONFIG_HIGHMEM
+	/*
+	 * kmap_atomic() doesn't set the page virtual address, and
+	 * kunmap_atomic() takes care of cache flushing already.
+	 */
+	if (page_address(page))
+#endif
+		__cpuc_flush_dcache_page(page_address(page));
 
 	/*
 	 * If this is a page cache page, and we have an aliasing VIPT cache,
diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c
index a34954d9df7..73cae57fa70 100644
--- a/arch/arm/mm/highmem.c
+++ b/arch/arm/mm/highmem.c
@@ -40,11 +40,16 @@ void *kmap_atomic(struct page *page, enum km_type type)
 {
 	unsigned int idx;
 	unsigned long vaddr;
+	void *kmap;
 
 	pagefault_disable();
 	if (!PageHighMem(page))
 		return page_address(page);
 
+	kmap = kmap_high_get(page);
+	if (kmap)
+		return kmap;
+
 	idx = type + KM_TYPE_NR * smp_processor_id();
 	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
 #ifdef CONFIG_DEBUG_HIGHMEM
@@ -80,6 +85,9 @@ void kunmap_atomic(void *kvaddr, enum km_type type)
 #else
 		(void) idx;  /* to kill a warning */
 #endif
+	} else if (vaddr >= PKMAP_ADDR(0) && vaddr < PKMAP_ADDR(LAST_PKMAP)) {
+		/* this address was obtained through kmap_high_get() */
+		kunmap_high(pte_page(pkmap_page_table[PKMAP_NR(vaddr)]));
 	}
 	pagefault_enable();
 }
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 3a7279c1ce5..ea36186f32c 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -15,6 +15,7 @@
 #include <linux/mman.h>
 #include <linux/nodemask.h>
 #include <linux/initrd.h>
+#include <linux/sort.h>
 #include <linux/highmem.h>
 
 #include <asm/mach-types.h>
@@ -349,12 +350,43 @@ static void __init bootmem_free_node(int node, struct meminfo *mi)
 	free_area_init_node(node, zone_size, min, zhole_size);
 }
 
+#ifndef CONFIG_SPARSEMEM
+int pfn_valid(unsigned long pfn)
+{
+	struct meminfo *mi = &meminfo;
+	unsigned int left = 0, right = mi->nr_banks;
+
+	do {
+		unsigned int mid = (right + left) / 2;
+		struct membank *bank = &mi->bank[mid];
+
+		if (pfn < bank_pfn_start(bank))
+			right = mid;
+		else if (pfn >= bank_pfn_end(bank))
+			left = mid + 1;
+		else
+			return 1;
+	} while (left < right);
+	return 0;
+}
+EXPORT_SYMBOL(pfn_valid);
+#endif
+
+static int __init meminfo_cmp(const void *_a, const void *_b)
+{
+	const struct membank *a = _a, *b = _b;
+	long cmp = bank_pfn_start(a) - bank_pfn_start(b);
+	return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
+}
+
 void __init bootmem_init(void)
 {
 	struct meminfo *mi = &meminfo;
 	unsigned long min, max_low, max_high;
 	int node, initrd_node;
 
+	sort(&mi->bank, mi->nr_banks, sizeof(mi->bank[0]), meminfo_cmp, NULL);
+
 	/*
 	 * Locate which node contains the ramdisk image, if any.
 	 */
diff --git a/arch/arm/mm/nommu.c b/arch/arm/mm/nommu.c
index ad7bacc693b..900811cc913 100644
--- a/arch/arm/mm/nommu.c
+++ b/arch/arm/mm/nommu.c
@@ -12,6 +12,7 @@
 #include <asm/cacheflush.h>
 #include <asm/sections.h>
 #include <asm/page.h>
+#include <asm/setup.h>
 #include <asm/mach/arch.h>
 
 #include "mm.h"
diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S
index 54b1f721dec..7d63beaf974 100644
--- a/arch/arm/mm/proc-macros.S
+++ b/arch/arm/mm/proc-macros.S
@@ -77,19 +77,15 @@
  * Sanity check the PTE configuration for the code below - which makes
  * certain assumptions about how these bits are layed out.
  */
+#ifdef CONFIG_MMU
 #if L_PTE_SHARED != PTE_EXT_SHARED
 #error PTE shared bit mismatch
 #endif
-#if L_PTE_BUFFERABLE != PTE_BUFFERABLE
-#error PTE bufferable bit mismatch
-#endif
-#if L_PTE_CACHEABLE != PTE_CACHEABLE
-#error PTE cacheable bit mismatch
-#endif
 #if (L_PTE_EXEC+L_PTE_USER+L_PTE_WRITE+L_PTE_DIRTY+L_PTE_YOUNG+\
      L_PTE_FILE+L_PTE_PRESENT) > L_PTE_SHARED
 #error Invalid Linux PTE bit settings
 #endif
+#endif	/* CONFIG_MMU */
 
 /*
  * The ARMv6 and ARMv7 set_pte_ext translation function.
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 180a08d03a0..f3fa1c32fe9 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -127,7 +127,9 @@ ENDPROC(cpu_v7_switch_mm)
  */
 ENTRY(cpu_v7_set_pte_ext)
 #ifdef CONFIG_MMU
-	str	r1, [r0], #-2048		@ linux version
+ ARM(	str	r1, [r0], #-2048	)	@ linux version
+ THUMB(	str	r1, [r0]		)	@ linux version
+ THUMB(	sub	r0, r0, #2048		)
 
 	bic	r3, r1, #0x000003f0
 	bic	r3, r3, #PTE_TYPE_MASK
@@ -232,7 +234,6 @@ __v7_setup:
 	mcr	p15, 0, r4, c2, c0, 1		@ load TTB1
 	mov	r10, #0x1f			@ domains 0, 1 = manager
 	mcr	p15, 0, r10, c3, c0, 0		@ load domain access register
-#endif
 	/*
 	 * Memory region attributes with SCTLR.TRE=1
 	 *
@@ -265,6 +266,7 @@ __v7_setup:
 	ldr	r6, =0x40e040e0			@ NMRR
 	mcr	p15, 0, r5, c10, c2, 0		@ write PRRR
 	mcr	p15, 0, r6, c10, c2, 1		@ write NMRR
+#endif
 	adr	r5, v7_crval
 	ldmia	r5, {r5, r6}
 #ifdef CONFIG_CPU_ENDIAN_BE8
@@ -273,6 +275,7 @@ __v7_setup:
    	mrc	p15, 0, r0, c1, c0, 0		@ read control register
 	bic	r0, r0, r5			@ clear bits them
 	orr	r0, r0, r6			@ set them
+ THUMB(	orr	r0, r0, #1 << 30	)	@ Thumb exceptions
 	mov	pc, lr				@ return to head.S:__ret
 ENDPROC(__v7_setup)