Merge branch 'akpm-current/current'

Conflicts:
	arch/arm64/Kconfig
	drivers/rapidio/devices/tsi721_dma.c
	kernel/kexec.c

66 files changed, 150 insertions, 478 deletions

diff --git a/arch/alpha/include/asm/Kbuild b/arch/alpha/include/asm/Kbuild
index 96e54bed5088..e858aa0ad8af 100644
--- a/arch/alpha/include/asm/Kbuild
+++ b/arch/alpha/include/asm/Kbuild
@@ -6,4 +6,5 @@ generic-y += exec.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
diff --git a/arch/alpha/include/asm/scatterlist.h b/arch/alpha/include/asm/scatterlist.h
deleted file mode 100644
index 017d7471c3c4..000000000000
--- a/arch/alpha/include/asm/scatterlist.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef _ALPHA_SCATTERLIST_H
-#define _ALPHA_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* !(_ALPHA_SCATTERLIST_H) */
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 916cedbd7a67..32cbbd565902 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -83,6 +83,7 @@ config ARM
 	  <http://www.arm.linux.org.uk/>.
 
 config ARM_HAS_SG_CHAIN
+	select ARCH_HAS_SG_CHAIN
 	bool
 
 config NEED_SG_DMA_LENGTH
diff --git a/arch/arm/include/asm/Kbuild b/arch/arm/include/asm/Kbuild
index f5a357601983..70cd84eb7fda 100644
--- a/arch/arm/include/asm/Kbuild
+++ b/arch/arm/include/asm/Kbuild
@@ -22,6 +22,7 @@ generic-y += poll.h
 generic-y += preempt.h
 generic-y += resource.h
 generic-y += rwsem.h
+generic-y += scatterlist.h
 generic-y += sections.h
 generic-y += segment.h
 generic-y += sembuf.h
diff --git a/arch/arm/include/asm/scatterlist.h b/arch/arm/include/asm/scatterlist.h
deleted file mode 100644
index cefdb8f898a1..000000000000
--- a/arch/arm/include/asm/scatterlist.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef _ASMARM_SCATTERLIST_H
-#define _ASMARM_SCATTERLIST_H
-
-#ifdef CONFIG_ARM_HAS_SG_CHAIN
-#define ARCH_HAS_SG_CHAIN
-#endif
-
-#include <asm/memory.h>
-#include <asm/types.h>
-#include <asm-generic/scatterlist.h>
-
-#endif /* _ASMARM_SCATTERLIST_H */
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 1f88db06b133..7a996aaa061e 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -26,6 +26,7 @@
 #include <linux/io.h>
 #include <linux/vmalloc.h>
 #include <linux/sizes.h>
+#include <linux/cma.h>
 
 #include <asm/memory.h>
 #include <asm/highmem.h>
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a5dc5ff145a3..62b4ae1c5bbf 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1,6 +1,7 @@
 config ARM64
 	def_bool y
 	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
+	select ARCH_HAS_SG_CHAIN
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select ARCH_SUPPORTS_ATOMIC_RMW
diff --git a/arch/cris/include/asm/Kbuild b/arch/cris/include/asm/Kbuild
index afff5105909d..31742dfadff9 100644
--- a/arch/cris/include/asm/Kbuild
+++ b/arch/cris/include/asm/Kbuild
@@ -13,6 +13,7 @@ generic-y += linkage.h
 generic-y += mcs_spinlock.h
 generic-y += module.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
 generic-y += vga.h
 generic-y += xor.h
diff --git a/arch/cris/include/asm/scatterlist.h b/arch/cris/include/asm/scatterlist.h
deleted file mode 100644
index f11f8f40ec4a..000000000000
--- a/arch/cris/include/asm/scatterlist.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef __ASM_CRIS_SCATTERLIST_H
-#define __ASM_CRIS_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* !(__ASM_CRIS_SCATTERLIST_H) */
diff --git a/arch/frv/include/asm/Kbuild b/arch/frv/include/asm/Kbuild
index 87b95eb8aee5..5b73921b6e9d 100644
--- a/arch/frv/include/asm/Kbuild
+++ b/arch/frv/include/asm/Kbuild
@@ -5,4 +5,5 @@ generic-y += exec.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
diff --git a/arch/frv/include/asm/scatterlist.h b/arch/frv/include/asm/scatterlist.h
deleted file mode 100644
index 0e5eb3018468..000000000000
--- a/arch/frv/include/asm/scatterlist.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef _ASM_SCATTERLIST_H
-#define _ASM_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* !_ASM_SCATTERLIST_H */
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 44a6915ab13d..c84c88bbbbd7 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -28,6 +28,7 @@ config IA64
 	select HAVE_MEMBLOCK
 	select HAVE_MEMBLOCK_NODE_MAP
 	select HAVE_VIRT_CPU_ACCOUNTING
+	select ARCH_HAS_SG_CHAIN
 	select VIRT_TO_BUS
 	select ARCH_DISCARD_MEMBLOCK
 	select GENERIC_IRQ_PROBE
diff --git a/arch/ia64/include/asm/Kbuild b/arch/ia64/include/asm/Kbuild
index 0da4aa2602ae..e8317d2d6c8d 100644
--- a/arch/ia64/include/asm/Kbuild
+++ b/arch/ia64/include/asm/Kbuild
@@ -5,5 +5,6 @@ generic-y += hash.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
 generic-y += vtime.h
diff --git a/arch/ia64/include/asm/scatterlist.h b/arch/ia64/include/asm/scatterlist.h
deleted file mode 100644
index 08fd93bff1db..000000000000
--- a/arch/ia64/include/asm/scatterlist.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef _ASM_IA64_SCATTERLIST_H
-#define _ASM_IA64_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-#define ARCH_HAS_SG_CHAIN
-
-#endif /* _ASM_IA64_SCATTERLIST_H */
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 3e71ef85e439..9a0104a38cd3 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -384,21 +384,6 @@ static struct irqaction timer_irqaction = {
 	.name =		"timer"
 };
 
-static struct platform_device rtc_efi_dev = {
-	.name = "rtc-efi",
-	.id = -1,
-};
-
-static int __init rtc_init(void)
-{
-	if (platform_device_register(&rtc_efi_dev) < 0)
-		printk(KERN_ERR "unable to register rtc device...\n");
-
-	/* not necessarily an error */
-	return 0;
-}
-module_init(rtc_init);
-
 void read_persistent_clock(struct timespec *ts)
 {
 	efi_gettimeofday(ts);
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 25c350264a41..892d43e32f3b 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -631,7 +631,8 @@ int arch_add_memory(int nid, u64 start, u64 size)
 
 	pgdat = NODE_DATA(nid);
 
-	zone = pgdat->node_zones + ZONE_NORMAL;
+	zone = pgdat->node_zones +
+		zone_for_memory(nid, start, size, ZONE_NORMAL);
 	ret = __add_pages(nid, zone, start_pfn, nr_pages);
 
 	if (ret)
diff --git a/arch/m32r/include/asm/Kbuild b/arch/m32r/include/asm/Kbuild
index 67779a74b62d..accc10a3dc78 100644
--- a/arch/m32r/include/asm/Kbuild
+++ b/arch/m32r/include/asm/Kbuild
@@ -6,4 +6,5 @@ generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += module.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
diff --git a/arch/m32r/include/asm/scatterlist.h b/arch/m32r/include/asm/scatterlist.h
deleted file mode 100644
index 7370b8b6243e..000000000000
--- a/arch/m32r/include/asm/scatterlist.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef _ASM_M32R_SCATTERLIST_H
-#define _ASM_M32R_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* _ASM_M32R_SCATTERLIST_H */
diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c
index 3a480b3df0d6..d2263a0bdc3d 100644
--- a/arch/m68k/kernel/sys_m68k.c
+++ b/arch/m68k/kernel/sys_m68k.c
@@ -376,7 +376,6 @@ cache_flush_060 (unsigned long addr, int scope, int cache, unsigned long len)
 asmlinkage int
 sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
 {
-	struct vm_area_struct *vma;
 	int ret = -EINVAL;
 
 	if (scope < FLUSH_SCOPE_LINE || scope > FLUSH_SCOPE_ALL ||
@@ -389,16 +388,23 @@ sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
 		if (!capable(CAP_SYS_ADMIN))
 			goto out;
 	} else {
+		struct vm_area_struct *vma;
+		bool invalid;
+
+		/* Check for overflow.  */
+		if (addr + len < addr)
+			goto out;
+
 		/*
 		 * Verify that the specified address region actually belongs
 		 * to this process.
 		 */
-		vma = find_vma (current->mm, addr);
 		ret = -EINVAL;
-		/* Check for overflow.  */
-		if (addr + len < addr)
-			goto out;
-		if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end)
+		down_read(&current->mm->mmap_sem);
+		vma = find_vma(current->mm, addr);
+		invalid = !vma || addr < vma->vm_start || addr + len > vma->vm_end;
+		up_read(&current->mm->mmap_sem);
+		if (invalid)
 			goto out;
 	}
 
diff --git a/arch/microblaze/include/asm/Kbuild b/arch/microblaze/include/asm/Kbuild
index 35b3ecaf25d5..27a3acda6c19 100644
--- a/arch/microblaze/include/asm/Kbuild
+++ b/arch/microblaze/include/asm/Kbuild
@@ -7,5 +7,6 @@ generic-y += exec.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += syscalls.h
 generic-y += trace_clock.h
diff --git a/arch/microblaze/include/asm/scatterlist.h b/arch/microblaze/include/asm/scatterlist.h
deleted file mode 100644
index 35d786fe93ae..000000000000
--- a/arch/microblaze/include/asm/scatterlist.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/scatterlist.h>
diff --git a/arch/mn10300/include/asm/Kbuild b/arch/mn10300/include/asm/Kbuild
index 654d5ba6e310..ecbd6676bd33 100644
--- a/arch/mn10300/include/asm/Kbuild
+++ b/arch/mn10300/include/asm/Kbuild
@@ -6,4 +6,5 @@ generic-y += exec.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
diff --git a/arch/mn10300/include/asm/scatterlist.h b/arch/mn10300/include/asm/scatterlist.h
deleted file mode 100644
index 7baa4006008a..000000000000
--- a/arch/mn10300/include/asm/scatterlist.h
+++ /dev/null
@@ -1,16 +0,0 @@
-/* MN10300 Scatterlist definitions
- *
- * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#ifndef _ASM_SCATTERLIST_H
-#define _ASM_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* _ASM_SCATTERLIST_H */
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 80b94b0add1f..4bc7b62fb4b6 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -111,6 +111,7 @@ config PPC
 	select HAVE_DMA_API_DEBUG
 	select HAVE_OPROFILE
 	select HAVE_DEBUG_KMEMLEAK
+	select ARCH_HAS_SG_CHAIN
 	select GENERIC_ATOMIC64 if PPC32
 	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 	select HAVE_PERF_EVENTS
diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild
index 3fb1bc432f4f..7f23f162ce9c 100644
--- a/arch/powerpc/include/asm/Kbuild
+++ b/arch/powerpc/include/asm/Kbuild
@@ -4,5 +4,6 @@ generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
 generic-y += rwsem.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
 generic-y += vtime.h
diff --git a/arch/powerpc/include/asm/scatterlist.h b/arch/powerpc/include/asm/scatterlist.h
deleted file mode 100644
index de1f620bd5c9..000000000000
--- a/arch/powerpc/include/asm/scatterlist.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef _ASM_POWERPC_SCATTERLIST_H
-#define _ASM_POWERPC_SCATTERLIST_H
-/*
- * Copyright (C) 2001 PPC64 Team, IBM Corp
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <asm/dma.h>
-#include <asm-generic/scatterlist.h>
-
-#define ARCH_HAS_SG_CHAIN
-
-#endif /* _ASM_POWERPC_SCATTERLIST_H */
diff --git a/arch/powerpc/kvm/Makefile b/arch/powerpc/kvm/Makefile
index 1ccd7a1a441c..91cfb0d2c2e0 100644
--- a/arch/powerpc/kvm/Makefile
+++ b/arch/powerpc/kvm/Makefile
@@ -80,7 +80,6 @@ kvm-book3s_64-builtin-objs-$(CONFIG_KVM_BOOK3S_64_HANDLER) += \
 	book3s_hv_rm_mmu.o \
 	book3s_hv_ras.o \
 	book3s_hv_builtin.o \
-	book3s_hv_cma.o \
 	$(kvm-book3s_64-builtin-xics-objs-y)
 endif
 
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index e3d17f571085..72c20bb16d26 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -37,8 +37,6 @@
 #include <asm/ppc-opcode.h>
 #include <asm/cputable.h>
 
-#include "book3s_hv_cma.h"
-
 /* POWER7 has 10-bit LPIDs, PPC970 has 6-bit LPIDs */
 #define MAX_LPID_970	63
 
@@ -64,10 +62,10 @@ long kvmppc_alloc_hpt(struct kvm *kvm, u32 *htab_orderp)
 	}
 
 	kvm->arch.hpt_cma_alloc = 0;
-	VM_BUG_ON(order < KVM_CMA_CHUNK_ORDER);
 	page = kvm_alloc_hpt(1 << (order - PAGE_SHIFT));
 	if (page) {
 		hpt = (unsigned long)pfn_to_kaddr(page_to_pfn(page));
+		memset((void *)hpt, 0, (1 << order));
 		kvm->arch.hpt_cma_alloc = 1;
 	}
 
diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c
index 3b41447482e5..329d7fdd0a6a 100644
--- a/arch/powerpc/kvm/book3s_hv_builtin.c
+++ b/arch/powerpc/kvm/book3s_hv_builtin.c
@@ -16,12 +16,14 @@
 #include <linux/init.h>
 #include <linux/memblock.h>
 #include <linux/sizes.h>
+#include <linux/cma.h>
 
 #include <asm/cputable.h>
 #include <asm/kvm_ppc.h>
 #include <asm/kvm_book3s.h>
 
-#include "book3s_hv_cma.h"
+#define KVM_CMA_CHUNK_ORDER	18
+
 /*
  * Hash page table alignment on newer cpus(CPU_FTR_ARCH_206)
  * should be power of 2.
@@ -43,6 +45,8 @@ static unsigned long kvm_cma_resv_ratio = 5;
 unsigned long kvm_rma_pages = (1 << 27) >> PAGE_SHIFT;	/* 128MB */
 EXPORT_SYMBOL_GPL(kvm_rma_pages);
 
+static struct cma *kvm_cma;
+
 /* Work out RMLS (real mode limit selector) field value for a given RMA size.
    Assumes POWER7 or PPC970. */
 static inline int lpcr_rmls(unsigned long rma_size)
@@ -97,7 +101,7 @@ struct kvm_rma_info *kvm_alloc_rma()
 	ri = kmalloc(sizeof(struct kvm_rma_info), GFP_KERNEL);
 	if (!ri)
 		return NULL;
-	page = kvm_alloc_cma(kvm_rma_pages, kvm_rma_pages);
+	page = cma_alloc(kvm_cma, kvm_rma_pages, get_order(kvm_rma_pages));
 	if (!page)
 		goto err_out;
 	atomic_set(&ri->use_count, 1);
@@ -112,7 +116,7 @@ EXPORT_SYMBOL_GPL(kvm_alloc_rma);
 void kvm_release_rma(struct kvm_rma_info *ri)
 {
 	if (atomic_dec_and_test(&ri->use_count)) {
-		kvm_release_cma(pfn_to_page(ri->base_pfn), kvm_rma_pages);
+		cma_release(kvm_cma, pfn_to_page(ri->base_pfn), kvm_rma_pages);
 		kfree(ri);
 	}
 }
@@ -131,16 +135,18 @@ struct page *kvm_alloc_hpt(unsigned long nr_pages)
 {
 	unsigned long align_pages = HPT_ALIGN_PAGES;
 
+	VM_BUG_ON(get_order(nr_pages) < KVM_CMA_CHUNK_ORDER - PAGE_SHIFT);
+
 	/* Old CPUs require HPT aligned on a multiple of its size */
 	if (!cpu_has_feature(CPU_FTR_ARCH_206))
 		align_pages = nr_pages;
-	return kvm_alloc_cma(nr_pages, align_pages);
+	return cma_alloc(kvm_cma, nr_pages, get_order(align_pages));
 }
 EXPORT_SYMBOL_GPL(kvm_alloc_hpt);
 
 void kvm_release_hpt(struct page *page, unsigned long nr_pages)
 {
-	kvm_release_cma(page, nr_pages);
+	cma_release(kvm_cma, page, nr_pages);
 }
 EXPORT_SYMBOL_GPL(kvm_release_hpt);
 
@@ -179,7 +185,8 @@ void __init kvm_cma_reserve(void)
 			align_size = HPT_ALIGN_PAGES << PAGE_SHIFT;
 
 		align_size = max(kvm_rma_pages << PAGE_SHIFT, align_size);
-		kvm_cma_declare_contiguous(selected_size, align_size);
+		cma_declare_contiguous(0, selected_size, 0, align_size,
+			KVM_CMA_CHUNK_ORDER - PAGE_SHIFT, false, &kvm_cma);
 	}
 }
 
diff --git a/arch/powerpc/kvm/book3s_hv_cma.c b/arch/powerpc/kvm/book3s_hv_cma.c
deleted file mode 100644
index d9d3d8553d51..000000000000
--- a/arch/powerpc/kvm/book3s_hv_cma.c
+++ /dev/null
@@ -1,240 +0,0 @@
-/*
- * Contiguous Memory Allocator for ppc KVM hash pagetable  based on CMA
- * for DMA mapping framework
- *
- * Copyright IBM Corporation, 2013
- * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License or (at your optional) any later version of the license.
- *
- */
-#define pr_fmt(fmt) "kvm_cma: " fmt
-
-#ifdef CONFIG_CMA_DEBUG
-#ifndef DEBUG
-#  define DEBUG
-#endif
-#endif
-
-#include <linux/memblock.h>
-#include <linux/mutex.h>
-#include <linux/sizes.h>
-#include <linux/slab.h>
-
-#include "book3s_hv_cma.h"
-
-struct kvm_cma {
-	unsigned long	base_pfn;
-	unsigned long	count;
-	unsigned long	*bitmap;
-};
-
-static DEFINE_MUTEX(kvm_cma_mutex);
-static struct kvm_cma kvm_cma_area;
-
-/**
- * kvm_cma_declare_contiguous() - reserve area for contiguous memory handling
- *			          for kvm hash pagetable
- * @size:  Size of the reserved memory.
- * @alignment:  Alignment for the contiguous memory area
- *
- * This function reserves memory for kvm cma area. It should be
- * called by arch code when early allocator (memblock or bootmem)
- * is still activate.
- */
-long __init kvm_cma_declare_contiguous(phys_addr_t size, phys_addr_t alignment)
-{
-	long base_pfn;
-	phys_addr_t addr;
-	struct kvm_cma *cma = &kvm_cma_area;
-
-	pr_debug("%s(size %lx)\n", __func__, (unsigned long)size);
-
-	if (!size)
-		return -EINVAL;
-	/*
-	 * Sanitise input arguments.
-	 * We should be pageblock aligned for CMA.
-	 */
-	alignment = max(alignment, (phys_addr_t)(PAGE_SIZE << pageblock_order));
-	size = ALIGN(size, alignment);
-	/*
-	 * Reserve memory
-	 * Use __memblock_alloc_base() since
-	 * memblock_alloc_base() panic()s.
-	 */
-	addr = __memblock_alloc_base(size, alignment, 0);
-	if (!addr) {
-		base_pfn = -ENOMEM;
-		goto err;
-	} else
-		base_pfn = PFN_DOWN(addr);
-
-	/*
-	 * Each reserved area must be initialised later, when more kernel
-	 * subsystems (like slab allocator) are available.
-	 */
-	cma->base_pfn = base_pfn;
-	cma->count    = size >> PAGE_SHIFT;
-	pr_info("CMA: reserved %ld MiB\n", (unsigned long)size / SZ_1M);
-	return 0;
-err:
-	pr_err("CMA: failed to reserve %ld MiB\n", (unsigned long)size / SZ_1M);
-	return base_pfn;
-}
-
-/**
- * kvm_alloc_cma() - allocate pages from contiguous area
- * @nr_pages: Requested number of pages.
- * @align_pages: Requested alignment in number of pages
- *
- * This function allocates memory buffer for hash pagetable.
- */
-struct page *kvm_alloc_cma(unsigned long nr_pages, unsigned long align_pages)
-{
-	int ret;
-	struct page *page = NULL;
-	struct kvm_cma *cma = &kvm_cma_area;
-	unsigned long chunk_count, nr_chunk;
-	unsigned long mask, pfn, pageno, start = 0;
-
-
-	if (!cma || !cma->count)
-		return NULL;
-
-	pr_debug("%s(cma %p, count %lu, align pages %lu)\n", __func__,
-		 (void *)cma, nr_pages, align_pages);
-
-	if (!nr_pages)
-		return NULL;
-	/*
-	 * align mask with chunk size. The bit tracks pages in chunk size
-	 */
-	VM_BUG_ON(!is_power_of_2(align_pages));
-	mask = (align_pages >> (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT)) - 1;
-	BUILD_BUG_ON(PAGE_SHIFT > KVM_CMA_CHUNK_ORDER);
-
-	chunk_count = cma->count >>  (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT);
-	nr_chunk = nr_pages >> (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT);
-
-	mutex_lock(&kvm_cma_mutex);
-	for (;;) {
-		pageno = bitmap_find_next_zero_area(cma->bitmap, chunk_count,
-						    start, nr_chunk, mask);
-		if (pageno >= chunk_count)
-			break;
-
-		pfn = cma->base_pfn + (pageno << (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT));
-		ret = alloc_contig_range(pfn, pfn + nr_pages, MIGRATE_CMA);
-		if (ret == 0) {
-			bitmap_set(cma->bitmap, pageno, nr_chunk);
-			page = pfn_to_page(pfn);
-			memset(pfn_to_kaddr(pfn), 0, nr_pages << PAGE_SHIFT);
-			break;
-		} else if (ret != -EBUSY) {
-			break;
-		}
-		pr_debug("%s(): memory range at %p is busy, retrying\n",
-			 __func__, pfn_to_page(pfn));
-		/* try again with a bit different memory target */
-		start = pageno + mask + 1;
-	}
-	mutex_unlock(&kvm_cma_mutex);
-	pr_debug("%s(): returned %p\n", __func__, page);
-	return page;
-}
-
-/**
- * kvm_release_cma() - release allocated pages for hash pagetable
- * @pages: Allocated pages.
- * @nr_pages: Number of allocated pages.
- *
- * This function releases memory allocated by kvm_alloc_cma().
- * It returns false when provided pages do not belong to contiguous area and
- * true otherwise.
- */
-bool kvm_release_cma(struct page *pages, unsigned long nr_pages)
-{
-	unsigned long pfn;
-	unsigned long nr_chunk;
-	struct kvm_cma *cma = &kvm_cma_area;
-
-	if (!cma || !pages)
-		return false;
-
-	pr_debug("%s(page %p count %lu)\n", __func__, (void *)pages, nr_pages);
-
-	pfn = page_to_pfn(pages);
-
-	if (pfn < cma->base_pfn || pfn >= cma->base_pfn + cma->count)
-		return false;
-
-	VM_BUG_ON(pfn + nr_pages > cma->base_pfn + cma->count);
-	nr_chunk = nr_pages >>  (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT);
-
-	mutex_lock(&kvm_cma_mutex);
-	bitmap_clear(cma->bitmap,
-		     (pfn - cma->base_pfn) >> (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT),
-		     nr_chunk);
-	free_contig_range(pfn, nr_pages);
-	mutex_unlock(&kvm_cma_mutex);
-
-	return true;
-}
-
-static int __init kvm_cma_activate_area(unsigned long base_pfn,
-					unsigned long count)
-{
-	unsigned long pfn = base_pfn;
-	unsigned i = count >> pageblock_order;
-	struct zone *zone;
-
-	WARN_ON_ONCE(!pfn_valid(pfn));
-	zone = page_zone(pfn_to_page(pfn));
-	do {
-		unsigned j;
-		base_pfn = pfn;
-		for (j = pageblock_nr_pages; j; --j, pfn++) {
-			WARN_ON_ONCE(!pfn_valid(pfn));
-			/*
-			 * alloc_contig_range requires the pfn range
-			 * specified to be in the same zone. Make this
-			 * simple by forcing the entire CMA resv range
-			 * to be in the same zone.
-			 */
-			if (page_zone(pfn_to_page(pfn)) != zone)
-				return -EINVAL;
-		}
-		init_cma_reserved_pageblock(pfn_to_page(base_pfn));
-	} while (--i);
-	return 0;
-}
-
-static int __init kvm_cma_init_reserved_areas(void)
-{
-	int bitmap_size, ret;
-	unsigned long chunk_count;
-	struct kvm_cma *cma = &kvm_cma_area;
-
-	pr_debug("%s()\n", __func__);
-	if (!cma->count)
-		return 0;
-	chunk_count = cma->count >> (KVM_CMA_CHUNK_ORDER - PAGE_SHIFT);
-	bitmap_size = BITS_TO_LONGS(chunk_count) * sizeof(long);
-	cma->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
-	if (!cma->bitmap)
-		return -ENOMEM;
-
-	ret = kvm_cma_activate_area(cma->base_pfn, cma->count);
-	if (ret)
-		goto error;
-	return 0;
-
-error:
-	kfree(cma->bitmap);
-	return ret;
-}
-core_initcall(kvm_cma_init_reserved_areas);
diff --git a/arch/powerpc/kvm/book3s_hv_cma.h b/arch/powerpc/kvm/book3s_hv_cma.h
deleted file mode 100644
index 655144f75fa5..000000000000
--- a/arch/powerpc/kvm/book3s_hv_cma.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Contiguous Memory Allocator for ppc KVM hash pagetable  based on CMA
- * for DMA mapping framework
- *
- * Copyright IBM Corporation, 2013
- * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License or (at your optional) any later version of the license.
- *
- */
-
-#ifndef __POWERPC_KVM_CMA_ALLOC_H__
-#define __POWERPC_KVM_CMA_ALLOC_H__
-/*
- * Both RMA and Hash page allocation will be multiple of 256K.
- */
-#define KVM_CMA_CHUNK_ORDER	18
-
-extern struct page *kvm_alloc_cma(unsigned long nr_pages,
-				  unsigned long align_pages);
-extern bool kvm_release_cma(struct page *pages, unsigned long nr_pages);
-extern long kvm_cma_declare_contiguous(phys_addr_t size,
-				       phys_addr_t alignment) __init;
-#endif
diff --git a/arch/powerpc/mm/dma-noncoherent.c b/arch/powerpc/mm/dma-noncoherent.c
index 7b6c10750179..d85e86aac7fb 100644
--- a/arch/powerpc/mm/dma-noncoherent.c
+++ b/arch/powerpc/mm/dma-noncoherent.c
@@ -33,6 +33,7 @@
 #include <linux/export.h>
 
 #include <asm/tlbflush.h>
+#include <asm/dma.h>
 
 #include "mmu_decl.h"
 
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 2c8e90f5789e..e0f7a189c48e 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -128,7 +128,8 @@ int arch_add_memory(int nid, u64 start, u64 size)
 		return -EINVAL;
 
 	/* this should work for most non-highmem platforms */
-	zone = pgdata->node_zones;
+	zone = pgdata->node_zones +
+		zone_for_memory(nid, start, size, 0);
 
 	return __add_pages(nid, zone, start_pfn, nr_pages);
 }
diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c
index 534574a97ec9..3a104284b338 100644
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -25,6 +25,7 @@
 #include <asm/time.h>
 #include <asm/uic.h>
 #include <asm/ppc4xx.h>
+#include <asm/dma.h>
 
 
 static __initdata struct of_device_id warp_of_bus[] = {
diff --git a/arch/powerpc/platforms/52xx/efika.c b/arch/powerpc/platforms/52xx/efika.c
index 6e19b0ad5d26..3feffde9128d 100644
--- a/arch/powerpc/platforms/52xx/efika.c
+++ b/arch/powerpc/platforms/52xx/efika.c
@@ -13,6 +13,7 @@
 #include <generated/utsrelease.h>
 #include <linux/pci.h>
 #include <linux/of.h>
+#include <asm/dma.h>
 #include <asm/prom.h>
 #include <asm/time.h>
 #include <asm/machdep.h>
diff --git a/arch/powerpc/platforms/amigaone/setup.c b/arch/powerpc/platforms/amigaone/setup.c
index 03aabc0e16ac..2fe12046279e 100644
--- a/arch/powerpc/platforms/amigaone/setup.c
+++ b/arch/powerpc/platforms/amigaone/setup.c
@@ -24,6 +24,7 @@
 #include <asm/i8259.h>
 #include <asm/time.h>
 #include <asm/udbg.h>
+#include <asm/dma.h>
 
 extern void __flush_disable_L1(void);
 
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 720a11d339eb..0c96f38973dc 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -144,6 +144,7 @@ config S390
 	select TTY
 	select VIRT_CPU_ACCOUNTING
 	select VIRT_TO_BUS
+	select ARCH_HAS_SG_CHAIN
 
 config SCHED_OMIT_FRAME_POINTER
 	def_bool y
diff --git a/arch/s390/include/asm/Kbuild b/arch/s390/include/asm/Kbuild
index 57892a8a9055..b3fea0722ff1 100644
--- a/arch/s390/include/asm/Kbuild
+++ b/arch/s390/include/asm/Kbuild
@@ -4,4 +4,5 @@ generic-y += clkdev.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
diff --git a/arch/s390/include/asm/scatterlist.h b/arch/s390/include/asm/scatterlist.h
deleted file mode 100644
index 6d45ef6c12a7..000000000000
--- a/arch/s390/include/asm/scatterlist.h
+++ /dev/null
@@ -1,3 +0,0 @@
-#include <asm-generic/scatterlist.h>
-
-#define ARCH_HAS_SG_CHAIN
diff --git a/arch/score/include/asm/Kbuild b/arch/score/include/asm/Kbuild
index 2f947aba4bd4..aad209199f7e 100644
--- a/arch/score/include/asm/Kbuild
+++ b/arch/score/include/asm/Kbuild
@@ -8,5 +8,6 @@ generic-y += cputime.h
 generic-y += hash.h
 generic-y += mcs_spinlock.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += trace_clock.h
 generic-y += xor.h
diff --git a/arch/score/include/asm/scatterlist.h b/arch/score/include/asm/scatterlist.h
deleted file mode 100644
index 9f533b8362c7..000000000000
--- a/arch/score/include/asm/scatterlist.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef _ASM_SCORE_SCATTERLIST_H
-#define _ASM_SCORE_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#endif /* _ASM_SCORE_SCATTERLIST_H */
diff --git a/arch/score/include/uapi/asm/ptrace.h b/arch/score/include/uapi/asm/ptrace.h
index f59771a3f127..5c5e794058be 100644
--- a/arch/score/include/uapi/asm/ptrace.h
+++ b/arch/score/include/uapi/asm/ptrace.h
@@ -4,17 +4,6 @@
 #define PTRACE_GETREGS		12
 #define PTRACE_SETREGS		13
 
-#define PC		32
-#define CONDITION	33
-#define ECR		34
-#define EMA		35
-#define CEH		36
-#define CEL		37
-#define COUNTER		38
-#define LDCR		39
-#define STCR		40
-#define PSR		41
-
 #define SINGLESTEP16_INSN	0x7006
 #define SINGLESTEP32_INSN	0x840C8000
 #define BREAKPOINT16_INSN	0x7002		/* work on SPG300 */
diff --git a/arch/sh/drivers/dma/Kconfig b/arch/sh/drivers/dma/Kconfig
index cfd5b90a8628..78bc97b1d027 100644
--- a/arch/sh/drivers/dma/Kconfig
+++ b/arch/sh/drivers/dma/Kconfig
@@ -12,9 +12,8 @@ config SH_DMA_IRQ_MULTI
 	default y if CPU_SUBTYPE_SH7750  || CPU_SUBTYPE_SH7751  || \
 		     CPU_SUBTYPE_SH7750S || CPU_SUBTYPE_SH7750R || \
 		     CPU_SUBTYPE_SH7751R || CPU_SUBTYPE_SH7091  || \
-		     CPU_SUBTYPE_SH7763  || CPU_SUBTYPE_SH7764  || \
-		     CPU_SUBTYPE_SH7780  || CPU_SUBTYPE_SH7785  || \
-		     CPU_SUBTYPE_SH7760
+		     CPU_SUBTYPE_SH7763  || CPU_SUBTYPE_SH7780  || \
+		     CPU_SUBTYPE_SH7785  || CPU_SUBTYPE_SH7760
 
 config SH_DMA_API
 	depends on SH_DMA
diff --git a/arch/sh/include/cpu-sh4/cpu/dma-register.h b/arch/sh/include/cpu-sh4/cpu/dma-register.h
index 02788b6a03b7..9cd81e54056a 100644
--- a/arch/sh/include/cpu-sh4/cpu/dma-register.h
+++ b/arch/sh/include/cpu-sh4/cpu/dma-register.h
@@ -32,7 +32,6 @@
 #define CHCR_TS_HIGH_SHIFT	(20 - 2)	/* 2 bits for shifted low TS */
 #elif defined(CONFIG_CPU_SUBTYPE_SH7757) || \
 	defined(CONFIG_CPU_SUBTYPE_SH7763) || \
-	defined(CONFIG_CPU_SUBTYPE_SH7764) || \
 	defined(CONFIG_CPU_SUBTYPE_SH7780) || \
 	defined(CONFIG_CPU_SUBTYPE_SH7785)
 #define CHCR_TS_LOW_MASK	0x00000018
diff --git a/arch/sh/include/cpu-sh4a/cpu/dma.h b/arch/sh/include/cpu-sh4a/cpu/dma.h
index 89afb650ce25..8ceccceae844 100644
--- a/arch/sh/include/cpu-sh4a/cpu/dma.h
+++ b/arch/sh/include/cpu-sh4a/cpu/dma.h
@@ -14,8 +14,7 @@
 #define DMTE4_IRQ	evt2irq(0xb80)
 #define DMAE0_IRQ	evt2irq(0xbc0)	/* DMA Error IRQ*/
 #define SH_DMAC_BASE0	0xFE008020
-#elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \
-	defined(CONFIG_CPU_SUBTYPE_SH7764)
+#elif defined(CONFIG_CPU_SUBTYPE_SH7763)
 #define DMTE0_IRQ	evt2irq(0x640)
 #define DMTE4_IRQ	evt2irq(0x780)
 #define DMAE0_IRQ	evt2irq(0x6c0)
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7724.c b/arch/sh/kernel/cpu/sh4a/clock-sh7724.c
index f579dd528198..c187b9579c21 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7724.c
@@ -307,7 +307,7 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[HWBLK_TMU0]),
 	CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[HWBLK_TMU1]),
 
-	CLKDEV_ICK_ID("fck", "sh-cmt-16.0", &mstp_clks[HWBLK_CMT]),
+	CLKDEV_ICK_ID("fck", "sh-cmt-32.0", &mstp_clks[HWBLK_CMT]),
 	CLKDEV_DEV_ID("sh-wdt.0", &mstp_clks[HWBLK_RWDT]),
 	CLKDEV_DEV_ID("sh-dma-engine.1", &mstp_clks[HWBLK_DMAC1]),
 
@@ -332,6 +332,8 @@ static struct clk_lookup lookups[] = {
 	CLKDEV_CON_ID("tsif0", &mstp_clks[HWBLK_TSIF]),
 	CLKDEV_DEV_ID("renesas_usbhs.1", &mstp_clks[HWBLK_USB1]),
 	CLKDEV_DEV_ID("renesas_usbhs.0", &mstp_clks[HWBLK_USB0]),
+	CLKDEV_CON_ID("usb1", &mstp_clks[HWBLK_USB1]),
+	CLKDEV_CON_ID("usb0", &mstp_clks[HWBLK_USB0]),
 	CLKDEV_CON_ID("2dg0", &mstp_clks[HWBLK_2DG]),
 	CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[HWBLK_SDHI0]),
 	CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[HWBLK_SDHI1]),
diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c
index 552c8fcf9416..d6d0a986c6e9 100644
--- a/arch/sh/kernel/time.c
+++ b/arch/sh/kernel/time.c
@@ -80,10 +80,8 @@ static int __init rtc_generic_init(void)
 		return -ENODEV;
 
 	pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
-	if (IS_ERR(pdev))
-		return PTR_ERR(pdev);
 
-	return 0;
+	return PTR_ERR_OR_ZERO(pdev);
 }
 module_init(rtc_generic_init);
 
diff --git a/arch/sh/mm/asids-debugfs.c b/arch/sh/mm/asids-debugfs.c
index 74c03ecc4871..ecfc6b0c1da1 100644
--- a/arch/sh/mm/asids-debugfs.c
+++ b/arch/sh/mm/asids-debugfs.c
@@ -67,10 +67,8 @@ static int __init asids_debugfs_init(void)
 					   NULL, &asids_debugfs_fops);
 	if (!asids_dentry)
 		return -ENOMEM;
-	if (IS_ERR(asids_dentry))
-		return PTR_ERR(asids_dentry);
 
-	return 0;
+	return PTR_ERR_OR_ZERO(asids_dentry);
 }
 module_init(asids_debugfs_init);
 
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 2d089fe2cba9..2790b6a64157 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -495,8 +495,9 @@ int arch_add_memory(int nid, u64 start, u64 size)
 	pgdat = NODE_DATA(nid);
 
 	/* We only have ZONE_NORMAL, so this is easy.. */
-	ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL,
-				start_pfn, nr_pages);
+	ret = __add_pages(nid, pgdat->node_zones +
+			zone_for_memory(nid, start, size, ZONE_NORMAL),
+			start_pfn, nr_pages);
 	if (unlikely(ret))
 		printk("%s: Failed, __add_pages() == %d\n", __func__, ret);
 
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 4692c90936f1..a537816613f9 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -42,6 +42,7 @@ config SPARC
 	select MODULES_USE_ELF_RELA
 	select ODD_RT_SIGACTION
 	select OLD_SIGSUSPEND
+	select ARCH_HAS_SG_CHAIN
 
 config SPARC32
 	def_bool !64BIT
diff --git a/arch/sparc/include/asm/Kbuild b/arch/sparc/include/asm/Kbuild
index a45821818003..cdd1b447bb6c 100644
--- a/arch/sparc/include/asm/Kbuild
+++ b/arch/sparc/include/asm/Kbuild
@@ -15,6 +15,7 @@ generic-y += mcs_spinlock.h
 generic-y += module.h
 generic-y += mutex.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += serial.h
 generic-y += trace_clock.h
 generic-y += types.h
diff --git a/arch/sparc/include/asm/scatterlist.h b/arch/sparc/include/asm/scatterlist.h
deleted file mode 100644
index 92bb638313f8..000000000000
--- a/arch/sparc/include/asm/scatterlist.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef _SPARC_SCATTERLIST_H
-#define _SPARC_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#define ARCH_HAS_SG_CHAIN
-
-#endif /* !(_SPARC_SCATTERLIST_H) */
diff --git a/arch/tile/include/asm/hardwall.h b/arch/tile/include/asm/hardwall.h
index 2f572b6b7bc2..44d2765bde2b 100644
--- a/arch/tile/include/asm/hardwall.h
+++ b/arch/tile/include/asm/hardwall.h
@@ -23,7 +23,7 @@
 struct proc_dir_entry;
 #ifdef CONFIG_HARDWALL
 void proc_tile_hardwall_init(struct proc_dir_entry *root);
-int proc_pid_hardwall(struct task_struct *task, char *buffer);
+int proc_pid_hardwall(struct seq_file *m, struct pid_namespace *ns, struct pid *pid, struct task_struct *task);
 #else
 static inline void proc_tile_hardwall_init(struct proc_dir_entry *root) {}
 #endif
diff --git a/arch/tile/kernel/hardwall.c b/arch/tile/kernel/hardwall.c
index 531f4c365351..aca6000bca75 100644
--- a/arch/tile/kernel/hardwall.c
+++ b/arch/tile/kernel/hardwall.c
@@ -947,15 +947,15 @@ static void hardwall_remove_proc(struct hardwall_info *info)
 	remove_proc_entry(buf, info->type->proc_dir);
 }
 
-int proc_pid_hardwall(struct task_struct *task, char *buffer)
+int proc_pid_hardwall(struct seq_file *m, struct pid_namespace *ns,
+		      struct pid *pid, struct task_struct *task)
 {
 	int i;
 	int n = 0;
 	for (i = 0; i < HARDWALL_TYPES; ++i) {
 		struct hardwall_info *info = task->thread.hardwall[i].info;
 		if (info)
-			n += sprintf(&buffer[n], "%s: %d\n",
-				     info->type->name, info->id);
+			seq_printf(m, "%s: %d\n", info->type->name, info->id);
 	}
 	return n;
 }
diff --git a/arch/tile/kernel/module.c b/arch/tile/kernel/module.c
index 4918d91bc3a6..d19b13e3a59f 100644
--- a/arch/tile/kernel/module.c
+++ b/arch/tile/kernel/module.c
@@ -58,7 +58,7 @@ void *module_alloc(unsigned long size)
 	area->nr_pages = npages;
 	area->pages = pages;
 
-	if (map_vm_area(area, prot_rwx, &pages)) {
+	if (map_vm_area(area, prot_rwx, pages)) {
 		vunmap(area->addr);
 		goto error;
 	}
diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/asm/Kbuild
index a5e4b6068213..7bd64aa2e94a 100644
--- a/arch/um/include/asm/Kbuild
+++ b/arch/um/include/asm/Kbuild
@@ -21,6 +21,7 @@ generic-y += param.h
 generic-y += pci.h
 generic-y += percpu.h
 generic-y += preempt.h
+generic-y += scatterlist.h
 generic-y += sections.h
 generic-y += switch_to.h
 generic-y += topology.h
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 796447db4146..8279f28e2ade 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -96,6 +96,7 @@ config X86
 	select IRQ_FORCED_THREADING
 	select HAVE_BPF_JIT if X86_64
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+	select ARCH_HAS_SG_CHAIN
 	select CLKEVT_I8253
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_IOMAP
diff --git a/arch/x86/include/asm/Kbuild b/arch/x86/include/asm/Kbuild
index 3ca9762e1649..3bf000fab0ae 100644
--- a/arch/x86/include/asm/Kbuild
+++ b/arch/x86/include/asm/Kbuild
@@ -5,6 +5,7 @@ genhdr-y += unistd_64.h
 genhdr-y += unistd_x32.h
 
 generic-y += clkdev.h
-generic-y += early_ioremap.h
 generic-y += cputime.h
+generic-y += early_ioremap.h
 generic-y += mcs_spinlock.h
+generic-y += scatterlist.h
diff --git a/arch/x86/include/asm/numa.h b/arch/x86/include/asm/numa.h
index 4064acae625d..01b493e5a99b 100644
--- a/arch/x86/include/asm/numa.h
+++ b/arch/x86/include/asm/numa.h
@@ -9,7 +9,6 @@
 #ifdef CONFIG_NUMA
 
 #define NR_NODE_MEMBLKS		(MAX_NUMNODES*2)
-#define ZONE_ALIGN (1UL << (MAX_ORDER+PAGE_SHIFT))
 
 /*
  * Too small node sizes may confuse the VM badly. Usually they
diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
index 5be9063545d2..809abb335627 100644
--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -115,7 +115,8 @@ static inline void native_pgd_clear(pgd_t *pgd)
 	native_set_pgd(pgd, native_make_pgd(0));
 }
 
-extern void sync_global_pgds(unsigned long start, unsigned long end);
+extern void sync_global_pgds(unsigned long start, unsigned long end,
+			     int removed);
 
 /*
  * Conversion functions: convert a page and protection to a page entry,
diff --git a/arch/x86/include/asm/scatterlist.h b/arch/x86/include/asm/scatterlist.h
deleted file mode 100644
index 4240878b9d76..000000000000
--- a/arch/x86/include/asm/scatterlist.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef _ASM_X86_SCATTERLIST_H
-#define _ASM_X86_SCATTERLIST_H
-
-#include <asm-generic/scatterlist.h>
-
-#define ARCH_HAS_SG_CHAIN
-
-#endif /* _ASM_X86_SCATTERLIST_H */
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 1dbade870f90..d393ac669cc0 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -350,7 +350,7 @@ out:
 
 void vmalloc_sync_all(void)
 {
-	sync_global_pgds(VMALLOC_START & PGDIR_MASK, VMALLOC_END);
+	sync_global_pgds(VMALLOC_START & PGDIR_MASK, VMALLOC_END, 0);
 }
 
 /*
@@ -1218,7 +1218,8 @@ good_area:
 	/*
 	 * If for any reason at all we couldn't handle the fault,
 	 * make sure we exit gracefully rather than endlessly redo
-	 * the fault:
+	 * the fault.  Since we never set FAULT_FLAG_RETRY_NOWAIT, if
+	 * we get VM_FAULT_RETRY back, the mmap_sem has been unlocked.
 	 */
 	fault = handle_mm_fault(mm, vma, address, flags);
 
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index e39504878aec..7d05565ba781 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -825,7 +825,8 @@ void __init mem_init(void)
 int arch_add_memory(int nid, u64 start, u64 size)
 {
 	struct pglist_data *pgdata = NODE_DATA(nid);
-	struct zone *zone = pgdata->node_zones + ZONE_HIGHMEM;
+	struct zone *zone = pgdata->node_zones +
+		zone_for_memory(nid, start, size, ZONE_HIGHMEM);
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long nr_pages = size >> PAGE_SHIFT;
 
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index df1a9927ad29..529625118ff6 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -178,7 +178,7 @@ __setup("noexec32=", nonx32_setup);
  * When memory was added/removed make sure all the processes MM have
  * suitable PGD entries in the local PGD level page.
  */
-void sync_global_pgds(unsigned long start, unsigned long end)
+void sync_global_pgds(unsigned long start, unsigned long end, int removed)
 {
 	unsigned long address;
 
@@ -186,7 +186,12 @@ void sync_global_pgds(unsigned long start, unsigned long end)
 		const pgd_t *pgd_ref = pgd_offset_k(address);
 		struct page *page;
 
-		if (pgd_none(*pgd_ref))
+		/*
+		 * When it is called after memory hot remove, pgd_none()
+		 * returns true. In this case (removed == 1), we must clear
+		 * the PGD entries in the local PGD level page.
+		 */
+		if (pgd_none(*pgd_ref) && !removed)
 			continue;
 
 		spin_lock(&pgd_lock);
@@ -199,12 +204,18 @@ void sync_global_pgds(unsigned long start, unsigned long end)
 			pgt_lock = &pgd_page_get_mm(page)->page_table_lock;
 			spin_lock(pgt_lock);
 
-			if (pgd_none(*pgd))
-				set_pgd(pgd, *pgd_ref);
-			else
+			if (!pgd_none(*pgd_ref) && !pgd_none(*pgd))
 				BUG_ON(pgd_page_vaddr(*pgd)
 				       != pgd_page_vaddr(*pgd_ref));
 
+			if (removed) {
+				if (pgd_none(*pgd_ref) && !pgd_none(*pgd))
+					pgd_clear(pgd);
+			} else {
+				if (pgd_none(*pgd))
+					set_pgd(pgd, *pgd_ref);
+			}
+
 			spin_unlock(pgt_lock);
 		}
 		spin_unlock(&pgd_lock);
@@ -633,7 +644,7 @@ kernel_physical_mapping_init(unsigned long start,
 	}
 
 	if (pgd_changed)
-		sync_global_pgds(addr, end - 1);
+		sync_global_pgds(addr, end - 1, 0);
 
 	__flush_tlb_all();
 
@@ -691,7 +702,8 @@ static void  update_end_of_memory_vars(u64 start, u64 size)
 int arch_add_memory(int nid, u64 start, u64 size)
 {
 	struct pglist_data *pgdat = NODE_DATA(nid);
-	struct zone *zone = pgdat->node_zones + ZONE_NORMAL;
+	struct zone *zone = pgdat->node_zones +
+		zone_for_memory(nid, start, size, ZONE_NORMAL);
 	unsigned long start_pfn = start >> PAGE_SHIFT;
 	unsigned long nr_pages = size >> PAGE_SHIFT;
 	int ret;
@@ -975,25 +987,26 @@ static void __meminit
 remove_pagetable(unsigned long start, unsigned long end, bool direct)
 {
 	unsigned long next;
+	unsigned long addr;
 	pgd_t *pgd;
 	pud_t *pud;
 	bool pgd_changed = false;
 
-	for (; start < end; start = next) {
-		next = pgd_addr_end(start, end);
+	for (addr = start; addr < end; addr = next) {
+		next = pgd_addr_end(addr, end);
 
-		pgd = pgd_offset_k(start);
+		pgd = pgd_offset_k(addr);
 		if (!pgd_present(*pgd))
 			continue;
 
 		pud = (pud_t *)pgd_page_vaddr(*pgd);
-		remove_pud_table(pud, start, next, direct);
+		remove_pud_table(pud, addr, next, direct);
 		if (free_pud_table(pud, pgd))
 			pgd_changed = true;
 	}
 
 	if (pgd_changed)
-		sync_global_pgds(start, end - 1);
+		sync_global_pgds(start, end - 1, 1);
 
 	flush_tlb_all();
 }
@@ -1340,7 +1353,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)
 	else
 		err = vmemmap_populate_basepages(start, end, node);
 	if (!err)
-		sync_global_pgds(start, end - 1);
+		sync_global_pgds(start, end - 1, 0);
 	return err;
 }
 
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index a32b706c401a..d221374d5ce8 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -185,8 +185,8 @@ int __init numa_add_memblk(int nid, u64 start, u64 end)
 	return numa_add_memblk_to(nid, start, end, &numa_meminfo);
 }
 
-/* Initialize NODE_DATA for a node on the local memory */
-static void __init setup_node_data(int nid, u64 start, u64 end)
+/* Allocate NODE_DATA for a node on the local memory */
+static void __init alloc_node_data(int nid)
 {
 	const size_t nd_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
 	u64 nd_pa;
@@ -194,18 +194,6 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
 	int tnid;
 
 	/*
-	 * Don't confuse VM with a node that doesn't have the
-	 * minimum amount of memory:
-	 */
-	if (end && (end - start) < NODE_MIN_SIZE)
-		return;
-
-	start = roundup(start, ZONE_ALIGN);
-
-	printk(KERN_INFO "Initmem setup node %d [mem %#010Lx-%#010Lx]\n",
-	       nid, start, end - 1);
-
-	/*
 	 * Allocate node data.  Try node-local memory and then any node.
 	 * Never allocate in DMA zone.
 	 */
@@ -222,7 +210,7 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
 	nd = __va(nd_pa);
 
 	/* report and initialize */
-	printk(KERN_INFO "  NODE_DATA [mem %#010Lx-%#010Lx]\n",
+	printk(KERN_INFO "NODE_DATA(%d) allocated [mem %#010Lx-%#010Lx]\n", nid,
 	       nd_pa, nd_pa + nd_size - 1);
 	tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
 	if (tnid != nid)
@@ -230,9 +218,6 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
 
 	node_data[nid] = nd;
 	memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
-	NODE_DATA(nid)->node_id = nid;
-	NODE_DATA(nid)->node_start_pfn = start >> PAGE_SHIFT;
-	NODE_DATA(nid)->node_spanned_pages = (end - start) >> PAGE_SHIFT;
 
 	node_set_online(nid);
 }
@@ -523,8 +508,17 @@ static int __init numa_register_memblks(struct numa_meminfo *mi)
 			end = max(mi->blk[i].end, end);
 		}
 
-		if (start < end)
-			setup_node_data(nid, start, end);
+		if (start >= end)
+			continue;
+
+		/*
+		 * Don't confuse VM with a node that doesn't have the
+		 * minimum amount of memory:
+		 */
+		if (end && (end - start) < NODE_MIN_SIZE)
+			continue;
+
+		alloc_node_data(nid);
 	}
 
 	/* Dump memblock with node info and return. */
diff --git a/arch/x86/platform/efi/efi-bgrt.c b/arch/x86/platform/efi/efi-bgrt.c
index f15103dff4b4..d143d216d52b 100644
--- a/arch/x86/platform/efi/efi-bgrt.c
+++ b/arch/x86/platform/efi/efi-bgrt.c
@@ -40,20 +40,40 @@ void __init efi_bgrt_init(void)
 	if (ACPI_FAILURE(status))
 		return;
 
-	if (bgrt_tab->header.length < sizeof(*bgrt_tab))
+	if (bgrt_tab->header.length < sizeof(*bgrt_tab)) {
+		pr_err("Ignoring BGRT: invalid length %u (expected %zu)\n",
+		       bgrt_tab->header.length, sizeof(*bgrt_tab));
 		return;
-	if (bgrt_tab->version != 1 || bgrt_tab->status != 1)
+	}
+	if (bgrt_tab->version != 1) {
+		pr_err("Ignoring BGRT: invalid version %u (expected 1)\n",
+		       bgrt_tab->version);
+		return;
+	}
+	if (bgrt_tab->status != 1) {
+		pr_err("Ignoring BGRT: invalid status %u (expected 1)\n",
+		       bgrt_tab->status);
+		return;
+	}
+	if (bgrt_tab->image_type != 0) {
+		pr_err("Ignoring BGRT: invalid image type %u (expected 0)\n",
+		       bgrt_tab->image_type);
 		return;
-	if (bgrt_tab->image_type != 0 || !bgrt_tab->image_address)
+	}
+	if (!bgrt_tab->image_address) {
+		pr_err("Ignoring BGRT: null image address\n");
 		return;
+	}
 
 	image = efi_lookup_mapped_addr(bgrt_tab->image_address);
 	if (!image) {
 		image = early_memremap(bgrt_tab->image_address,
 				       sizeof(bmp_header));
 		ioremapped = true;
-		if (!image)
+		if (!image) {
+			pr_err("Ignoring BGRT: failed to map image header memory\n");
 			return;
+		}
 	}
 
 	memcpy_fromio(&bmp_header, image, sizeof(bmp_header));
@@ -61,14 +81,18 @@ void __init efi_bgrt_init(void)
 		early_iounmap(image, sizeof(bmp_header));
 	bgrt_image_size = bmp_header.size;
 
-	bgrt_image = kmalloc(bgrt_image_size, GFP_KERNEL);
-	if (!bgrt_image)
+	bgrt_image = kmalloc(bgrt_image_size, GFP_KERNEL | __GFP_NOWARN);
+	if (!bgrt_image) {
+		pr_err("Ignoring BGRT: failed to allocate memory for image (wanted %zu bytes)\n",
+		       bgrt_image_size);
 		return;
+	}
 
 	if (ioremapped) {
 		image = early_memremap(bgrt_tab->image_address,
 				       bmp_header.size);
 		if (!image) {
+			pr_err("Ignoring BGRT: failed to map image memory\n");
 			kfree(bgrt_image);
 			bgrt_image = NULL;
 			return;