Merge branch 'akpm' (final batch from Andrew)

Merge third patch-bumb from Andrew Morton:
 "This wraps me up for -rc1.
   - Lots of misc stuff and things which were deferred/missed from
     patchbombings 1 & 2.
   - ocfs2 things
   - lib/scatterlist
   - hfsplus
   - fatfs
   - documentation
   - signals
   - procfs
   - lockdep
   - coredump
   - seqfile core
   - kexec
   - Tejun's large IDR tree reworkings
   - ipmi
   - partitions
   - nbd
   - random() things
   - kfifo
   - tools/testing/selftests updates
   - Sasha's large and pointless hlist cleanup"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (163 commits)
  hlist: drop the node parameter from iterators
  kcmp: make it depend on CHECKPOINT_RESTORE
  selftests: add a simple doc
  tools/testing/selftests/Makefile: rearrange targets
  selftests/efivarfs: add create-read test
  selftests/efivarfs: add empty file creation test
  selftests: add tests for efivarfs
  kfifo: fix kfifo_alloc() and kfifo_init()
  kfifo: move kfifo.c from kernel/ to lib/
  arch Kconfig: centralise CONFIG_ARCH_NO_VIRT_TO_BUS
  w1: add support for DS2413 Dual Channel Addressable Switch
  memstick: move the dereference below the NULL test
  drivers/pps/clients/pps-gpio.c: use devm_kzalloc
  Documentation/DMA-API-HOWTO.txt: fix typo
  include/linux/eventfd.h: fix incorrect filename is a comment
  mtd: mtd_stresstest: use prandom_bytes()
  mtd: mtd_subpagetest: convert to use prandom library
  mtd: mtd_speedtest: use prandom_bytes
  mtd: mtd_pagetest: convert to use prandom library
  mtd: mtd_oobtest: convert to use prandom library
  ...

39 files changed, 108 insertions, 131 deletions

diff --git a/arch/Kconfig b/arch/Kconfig
index 40e2b12c7916..dcd91a85536a 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -303,6 +303,13 @@ config ARCH_WANT_OLD_COMPAT_IPC
 	select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
 	bool
 
+config HAVE_VIRT_TO_BUS
+	bool
+	help
+	  An architecture should select this if it implements the
+	  deprecated interface virt_to_bus().  All new architectures
+	  should probably not select this.
+
 config HAVE_ARCH_SECCOMP_FILTER
 	bool
 	help
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 1ecbf7a1b677..5833aa441481 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -9,6 +9,7 @@ config ALPHA
 	select HAVE_PERF_EVENTS
 	select HAVE_DMA_ATTRS
 	select HAVE_GENERIC_HARDIRQS
+	select HAVE_VIRT_TO_BUS
 	select GENERIC_IRQ_PROBE
 	select AUTO_IRQ_AFFINITY if SMP
 	select GENERIC_IRQ_SHOW
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 6ec8eb3149ea..0e16cca1d011 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -49,6 +49,7 @@ config ARM
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_SYSCALL_TRACEPOINTS
 	select HAVE_UID16
+	select HAVE_VIRT_TO_BUS
 	select KTIME_SCALAR
 	select PERF_USE_VMALLOC
 	select RTC_LIB
diff --git a/arch/arm/kernel/kprobes.c b/arch/arm/kernel/kprobes.c
index 4dd41fc9e235..170e9f34003f 100644
--- a/arch/arm/kernel/kprobes.c
+++ b/arch/arm/kernel/kprobes.c
@@ -395,7 +395,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
 {
 	struct kretprobe_instance *ri = NULL;
 	struct hlist_head *head, empty_rp;
-	struct hlist_node *node, *tmp;
+	struct hlist_node *tmp;
 	unsigned long flags, orig_ret_address = 0;
 	unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline;
 
@@ -415,7 +415,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
 	 *       real return address, and all the rest will point to
 	 *       kretprobe_trampoline
 	 */
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -442,7 +442,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
 	kretprobe_assert(ri, orig_ret_address, trampoline_address);
 	kretprobe_hash_unlock(current, &flags);
 
-	hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
 		hlist_del(&ri->hlist);
 		kfree(ri);
 	}
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index 2ae6591b3a55..9b89257b2cfd 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -7,6 +7,7 @@ config AVR32
 	select HAVE_OPROFILE
 	select HAVE_KPROBES
 	select HAVE_GENERIC_HARDIRQS
+	select HAVE_VIRT_TO_BUS
 	select GENERIC_IRQ_PROBE
 	select GENERIC_ATOMIC64
 	select HARDIRQS_SW_RESEND
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index e98f3248c8aa..600494c70e96 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -33,6 +33,7 @@ config BLACKFIN
 	select ARCH_HAVE_CUSTOM_GPIO_H
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select HAVE_UID16
+	select HAVE_VIRT_TO_BUS
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select HAVE_GENERIC_HARDIRQS
 	select GENERIC_ATOMIC64
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index 0e5c187ac7d2..bb0ac66cf533 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -43,6 +43,7 @@ config CRIS
 	select GENERIC_ATOMIC64
 	select HAVE_GENERIC_HARDIRQS
 	select HAVE_UID16
+	select HAVE_VIRT_TO_BUS
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select GENERIC_IRQ_SHOW
 	select GENERIC_IOMAP
diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index 2d0509d4cfee..12369b194c7b 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -6,6 +6,7 @@ config FRV
 	select HAVE_PERF_EVENTS
 	select HAVE_UID16
 	select HAVE_GENERIC_HARDIRQS
+	select HAVE_VIRT_TO_BUS
 	select GENERIC_IRQ_SHOW
 	select HAVE_DEBUG_BUGVERBOSE
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
diff --git a/arch/frv/mm/elf-fdpic.c b/arch/frv/mm/elf-fdpic.c
index 385fd30b142f..836f14707a62 100644
--- a/arch/frv/mm/elf-fdpic.c
+++ b/arch/frv/mm/elf-fdpic.c
@@ -60,7 +60,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi
 				     unsigned long pgoff, unsigned long flags)
 {
 	struct vm_area_struct *vma;
-	unsigned long limit;
+	struct vm_unmapped_area_info info;
 
 	if (len > TASK_SIZE)
 		return -ENOMEM;
@@ -79,39 +79,24 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi
 	}
 
 	/* search between the bottom of user VM and the stack grow area */
-	addr = PAGE_SIZE;
-	limit = (current->mm->start_stack - 0x00200000);
-	if (addr + len <= limit) {
-		limit -= len;
-
-		if (addr <= limit) {
-			vma = find_vma(current->mm, PAGE_SIZE);
-			for (; vma; vma = vma->vm_next) {
-				if (addr > limit)
-					break;
-				if (addr + len <= vma->vm_start)
-					goto success;
-				addr = vma->vm_end;
-			}
-		}
-	}
+	info.flags = 0;
+	info.length = len;
+	info.low_limit = PAGE_SIZE;
+	info.high_limit = (current->mm->start_stack - 0x00200000);
+	info.align_mask = 0;
+	info.align_offset = 0;
+	addr = vm_unmapped_area(&info);
+	if (!(addr & ~PAGE_MASK))
+		goto success;
+	VM_BUG_ON(addr != -ENOMEM);
 
 	/* search from just above the WorkRAM area to the top of memory */
-	addr = PAGE_ALIGN(0x80000000);
-	limit = TASK_SIZE - len;
-	if (addr <= limit) {
-		vma = find_vma(current->mm, addr);
-		for (; vma; vma = vma->vm_next) {
-			if (addr > limit)
-				break;
-			if (addr + len <= vma->vm_start)
-				goto success;
-			addr = vma->vm_end;
-		}
-
-		if (!vma && addr <= limit)
-			goto success;
-	}
+	info.low_limit = PAGE_ALIGN(0x80000000);
+	info.high_limit = TASK_SIZE;
+	addr = vm_unmapped_area(&info);
+	if (!(addr & ~PAGE_MASK))
+		goto success;
+	VM_BUG_ON(addr != -ENOMEM);
 
 #if 0
 	printk("[area] l=%lx (ENOMEM) f='%s'\n",
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 05b613af223a..ae8551eb3736 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -5,6 +5,7 @@ config H8300
 	select HAVE_GENERIC_HARDIRQS
 	select GENERIC_ATOMIC64
 	select HAVE_UID16
+	select HAVE_VIRT_TO_BUS
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select GENERIC_IRQ_SHOW
 	select GENERIC_CPU_DEVICES
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index c90366ef7183..33f3fdc0b214 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -26,6 +26,7 @@ config IA64
 	select HAVE_MEMBLOCK
 	select HAVE_MEMBLOCK_NODE_MAP
 	select HAVE_VIRT_CPU_ACCOUNTING
+	select HAVE_VIRT_TO_BUS
 	select ARCH_DISCARD_MEMBLOCK
 	select GENERIC_IRQ_PROBE
 	select GENERIC_PENDING_IRQ if SMP
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c
index 7026b29e277a..f8280a766a78 100644
--- a/arch/ia64/kernel/kprobes.c
+++ b/arch/ia64/kernel/kprobes.c
@@ -423,7 +423,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 {
 	struct kretprobe_instance *ri = NULL;
 	struct hlist_head *head, empty_rp;
-	struct hlist_node *node, *tmp;
+	struct hlist_node *tmp;
 	unsigned long flags, orig_ret_address = 0;
 	unsigned long trampoline_address =
 		((struct fnptr *)kretprobe_trampoline)->ip;
@@ -444,7 +444,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 	 *       real return address, and all the rest will point to
 	 *       kretprobe_trampoline
 	 */
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -461,7 +461,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 
 	regs->cr_iip = orig_ret_address;
 
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -487,7 +487,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 	kretprobe_hash_unlock(current, &flags);
 	preempt_enable_no_resched();
 
-	hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
 		hlist_del(&ri->hlist);
 		kfree(ri);
 	}
diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index f807721e19a5..92623818a1fe 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -10,6 +10,7 @@ config M32R
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select HAVE_DEBUG_BUGVERBOSE
 	select HAVE_GENERIC_HARDIRQS
+	select HAVE_VIRT_TO_BUS
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
 	select GENERIC_ATOMIC64
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index efb1ce1f14a3..0e708c78e01c 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -8,6 +8,7 @@ config M68K
 	select GENERIC_IRQ_SHOW
 	select GENERIC_ATOMIC64
 	select HAVE_UID16
+	select HAVE_VIRT_TO_BUS
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
 	select GENERIC_CPU_DEVICES
 	select GENERIC_STRNCPY_FROM_USER if MMU
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index ba3b7c8c04b8..7843d11156e6 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -19,6 +19,7 @@ config MICROBLAZE
 	select HAVE_DEBUG_KMEMLEAK
 	select IRQ_DOMAIN
 	select HAVE_GENERIC_HARDIRQS
+	select HAVE_VIRT_TO_BUS
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
 	select GENERIC_PCI_IOMAP
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 198641589bb5..1eabe5753215 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -38,6 +38,7 @@ config MIPS
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_CMOS_UPDATE
 	select HAVE_MOD_ARCH_SPECIFIC
+	select HAVE_VIRT_TO_BUS
 	select MODULES_USE_ELF_REL if MODULES
 	select MODULES_USE_ELF_RELA if MODULES && 64BIT
 	select CLONE_BACKWARDS
diff --git a/arch/mips/kernel/kprobes.c b/arch/mips/kernel/kprobes.c
index 158467da9bc1..ce3f0807ad1e 100644
--- a/arch/mips/kernel/kprobes.c
+++ b/arch/mips/kernel/kprobes.c
@@ -598,7 +598,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
 {
 	struct kretprobe_instance *ri = NULL;
 	struct hlist_head *head, empty_rp;
-	struct hlist_node *node, *tmp;
+	struct hlist_node *tmp;
 	unsigned long flags, orig_ret_address = 0;
 	unsigned long trampoline_address = (unsigned long)kretprobe_trampoline;
 
@@ -618,7 +618,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
 	 *       real return address, and all the rest will point to
 	 *       kretprobe_trampoline
 	 */
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -645,7 +645,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
 	kretprobe_hash_unlock(current, &flags);
 	preempt_enable_no_resched();
 
-	hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
 		hlist_del(&ri->hlist);
 		kfree(ri);
 	}
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index ad0caea0bfea..b06c7360b1c6 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -8,6 +8,7 @@ config MN10300
 	select HAVE_ARCH_KGDB
 	select GENERIC_ATOMIC64
 	select HAVE_NMI_WATCHDOG if MN10300_WD_TIMER
+	select HAVE_VIRT_TO_BUS
 	select GENERIC_CLOCKEVENTS
 	select MODULES_USE_ELF_RELA
 	select OLD_SIGSUSPEND3
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 35a4e5f6e71c..014a6482ed4c 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -12,6 +12,7 @@ config OPENRISC
 	select ARCH_WANT_OPTIONAL_GPIOLIB
         select HAVE_ARCH_TRACEHOOK
 	select HAVE_GENERIC_HARDIRQS
+	select HAVE_VIRT_TO_BUS
 	select GENERIC_IRQ_CHIP
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 7f9b3c53f74a..4d5ea7648574 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -19,6 +19,7 @@ config PARISC
 	select GENERIC_SMP_IDLE_THREAD
 	select GENERIC_STRNCPY_FROM_USER
 	select HAVE_MOD_ARCH_SPECIFIC
+	select HAVE_VIRT_TO_BUS
 	select MODULES_USE_ELF_RELA
 	select CLONE_BACKWARDS
 	select TTY # Needed for pdc_cons.c
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index 54d619d4cac6..5dfd248e3f1a 100644
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -35,22 +35,17 @@
 
 static unsigned long get_unshared_area(unsigned long addr, unsigned long len)
 {
-	struct vm_area_struct *vma;
+	struct vm_unmapped_area_info info;
 
-	addr = PAGE_ALIGN(addr);
-
-	for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
-		/* At this point:  (!vma || addr < vma->vm_end). */
-		if (TASK_SIZE - len < addr)
-			return -ENOMEM;
-		if (!vma || addr + len <= vma->vm_start)
-			return addr;
-		addr = vma->vm_end;
-	}
+	info.flags = 0;
+	info.length = len;
+	info.low_limit = PAGE_ALIGN(addr);
+	info.high_limit = TASK_SIZE;
+	info.align_mask = 0;
+	info.align_offset = 0;
+	return vm_unmapped_area(&info);
 }
 
-#define DCACHE_ALIGN(addr) (((addr) + (SHMLBA - 1)) &~ (SHMLBA - 1))
-
 /*
  * We need to know the offset to use.  Old scheme was to look for
  * existing mapping and use the same offset.  New scheme is to use the
@@ -63,30 +58,21 @@ static unsigned long get_unshared_area(unsigned long addr, unsigned long len)
  */
 static int get_offset(struct address_space *mapping)
 {
-	int offset = (unsigned long) mapping << (PAGE_SHIFT - 8);
-	return offset & 0x3FF000;
+	return (unsigned long) mapping >> 8;
 }
 
 static unsigned long get_shared_area(struct address_space *mapping,
 		unsigned long addr, unsigned long len, unsigned long pgoff)
 {
-	struct vm_area_struct *vma;
-	int offset = mapping ? get_offset(mapping) : 0;
+	struct vm_unmapped_area_info info;
 
-	offset = (offset + (pgoff << PAGE_SHIFT)) & 0x3FF000;
-
-	addr = DCACHE_ALIGN(addr - offset) + offset;
-
-	for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
-		/* At this point:  (!vma || addr < vma->vm_end). */
-		if (TASK_SIZE - len < addr)
-			return -ENOMEM;
-		if (!vma || addr + len <= vma->vm_start)
-			return addr;
-		addr = DCACHE_ALIGN(vma->vm_end - offset) + offset;
-		if (addr < vma->vm_end) /* handle wraparound */
-			return -ENOMEM;
-	}
+	info.flags = 0;
+	info.length = len;
+	info.low_limit = PAGE_ALIGN(addr);
+	info.high_limit = TASK_SIZE;
+	info.align_mask = PAGE_MASK & (SHMLBA - 1);
+	info.align_offset = (get_offset(mapping) + pgoff) << PAGE_SHIFT;
+	return vm_unmapped_area(&info);
 }
 
 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 5c7470689a10..b89d7eb730a2 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -87,9 +87,6 @@ config GENERIC_GPIO
 	help
 	  Generic GPIO API support
 
-config ARCH_NO_VIRT_TO_BUS
-	def_bool PPC64
-
 config PPC
 	bool
 	default y
@@ -101,6 +98,7 @@ config PPC
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select SYSCTL_EXCEPTION_TRACE
 	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select HAVE_VIRT_TO_BUS if !PPC64
 	select HAVE_IDE
 	select HAVE_IOREMAP_PROT
 	select HAVE_EFFICIENT_UNALIGNED_ACCESS
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index e88c64331819..11f5b03a0b06 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -310,7 +310,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
 {
 	struct kretprobe_instance *ri = NULL;
 	struct hlist_head *head, empty_rp;
-	struct hlist_node *node, *tmp;
+	struct hlist_node *tmp;
 	unsigned long flags, orig_ret_address = 0;
 	unsigned long trampoline_address =(unsigned long)&kretprobe_trampoline;
 
@@ -330,7 +330,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
 	 *       real return address, and all the rest will point to
 	 *       kretprobe_trampoline
 	 */
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -357,7 +357,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
 	kretprobe_hash_unlock(current, &flags);
 	preempt_enable_no_resched();
 
-	hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
 		hlist_del(&ri->hlist);
 		kfree(ri);
 	}
diff --git a/arch/powerpc/kvm/book3s_mmu_hpte.c b/arch/powerpc/kvm/book3s_mmu_hpte.c
index 2c86b0d63714..da8b13c4b776 100644
--- a/arch/powerpc/kvm/book3s_mmu_hpte.c
+++ b/arch/powerpc/kvm/book3s_mmu_hpte.c
@@ -124,7 +124,6 @@ static void kvmppc_mmu_pte_flush_all(struct kvm_vcpu *vcpu)
 {
 	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
 	struct hpte_cache *pte;
-	struct hlist_node *node;
 	int i;
 
 	rcu_read_lock();
@@ -132,7 +131,7 @@ static void kvmppc_mmu_pte_flush_all(struct kvm_vcpu *vcpu)
 	for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
 		struct hlist_head *list = &vcpu3s->hpte_hash_vpte_long[i];
 
-		hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
+		hlist_for_each_entry_rcu(pte, list, list_vpte_long)
 			invalidate_pte(vcpu, pte);
 	}
 
@@ -143,7 +142,6 @@ static void kvmppc_mmu_pte_flush_page(struct kvm_vcpu *vcpu, ulong guest_ea)
 {
 	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
 	struct hlist_head *list;
-	struct hlist_node *node;
 	struct hpte_cache *pte;
 
 	/* Find the list of entries in the map */
@@ -152,7 +150,7 @@ static void kvmppc_mmu_pte_flush_page(struct kvm_vcpu *vcpu, ulong guest_ea)
 	rcu_read_lock();
 
 	/* Check the list for matching entries and invalidate */
-	hlist_for_each_entry_rcu(pte, node, list, list_pte)
+	hlist_for_each_entry_rcu(pte, list, list_pte)
 		if ((pte->pte.eaddr & ~0xfffUL) == guest_ea)
 			invalidate_pte(vcpu, pte);
 
@@ -163,7 +161,6 @@ static void kvmppc_mmu_pte_flush_long(struct kvm_vcpu *vcpu, ulong guest_ea)
 {
 	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
 	struct hlist_head *list;
-	struct hlist_node *node;
 	struct hpte_cache *pte;
 
 	/* Find the list of entries in the map */
@@ -173,7 +170,7 @@ static void kvmppc_mmu_pte_flush_long(struct kvm_vcpu *vcpu, ulong guest_ea)
 	rcu_read_lock();
 
 	/* Check the list for matching entries and invalidate */
-	hlist_for_each_entry_rcu(pte, node, list, list_pte_long)
+	hlist_for_each_entry_rcu(pte, list, list_pte_long)
 		if ((pte->pte.eaddr & 0x0ffff000UL) == guest_ea)
 			invalidate_pte(vcpu, pte);
 
@@ -207,7 +204,6 @@ static void kvmppc_mmu_pte_vflush_short(struct kvm_vcpu *vcpu, u64 guest_vp)
 {
 	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
 	struct hlist_head *list;
-	struct hlist_node *node;
 	struct hpte_cache *pte;
 	u64 vp_mask = 0xfffffffffULL;
 
@@ -216,7 +212,7 @@ static void kvmppc_mmu_pte_vflush_short(struct kvm_vcpu *vcpu, u64 guest_vp)
 	rcu_read_lock();
 
 	/* Check the list for matching entries and invalidate */
-	hlist_for_each_entry_rcu(pte, node, list, list_vpte)
+	hlist_for_each_entry_rcu(pte, list, list_vpte)
 		if ((pte->pte.vpage & vp_mask) == guest_vp)
 			invalidate_pte(vcpu, pte);
 
@@ -228,7 +224,6 @@ static void kvmppc_mmu_pte_vflush_long(struct kvm_vcpu *vcpu, u64 guest_vp)
 {
 	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
 	struct hlist_head *list;
-	struct hlist_node *node;
 	struct hpte_cache *pte;
 	u64 vp_mask = 0xffffff000ULL;
 
@@ -238,7 +233,7 @@ static void kvmppc_mmu_pte_vflush_long(struct kvm_vcpu *vcpu, u64 guest_vp)
 	rcu_read_lock();
 
 	/* Check the list for matching entries and invalidate */
-	hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
+	hlist_for_each_entry_rcu(pte, list, list_vpte_long)
 		if ((pte->pte.vpage & vp_mask) == guest_vp)
 			invalidate_pte(vcpu, pte);
 
@@ -266,7 +261,6 @@ void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 guest_vp, u64 vp_mask)
 void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
 {
 	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
-	struct hlist_node *node;
 	struct hpte_cache *pte;
 	int i;
 
@@ -277,7 +271,7 @@ void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
 	for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
 		struct hlist_head *list = &vcpu3s->hpte_hash_vpte_long[i];
 
-		hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
+		hlist_for_each_entry_rcu(pte, list, list_vpte_long)
 			if ((pte->pte.raddr >= pa_start) &&
 			    (pte->pte.raddr < pa_end))
 				invalidate_pte(vcpu, pte);
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index f09ae7b0b4c5..4b505370a1d5 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -134,6 +134,7 @@ config S390
 	select HAVE_SYSCALL_WRAPPERS
 	select HAVE_UID16 if 32BIT
 	select HAVE_VIRT_CPU_ACCOUNTING
+	select HAVE_VIRT_TO_BUS
 	select INIT_ALL_POSSIBLE
 	select KTIME_SCALAR if 32BIT
 	select MODULES_USE_ELF_RELA
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index d1c7214e157c..3388b2b2a07d 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -354,7 +354,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
 {
 	struct kretprobe_instance *ri;
 	struct hlist_head *head, empty_rp;
-	struct hlist_node *node, *tmp;
+	struct hlist_node *tmp;
 	unsigned long flags, orig_ret_address;
 	unsigned long trampoline_address;
 	kprobe_opcode_t *correct_ret_addr;
@@ -379,7 +379,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
 	orig_ret_address = 0;
 	correct_ret_addr = NULL;
 	trampoline_address = (unsigned long) &kretprobe_trampoline;
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -398,7 +398,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
 	kretprobe_assert(ri, orig_ret_address, trampoline_address);
 
 	correct_ret_addr = ri->ret_addr;
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -427,7 +427,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
 	kretprobe_hash_unlock(current, &flags);
 	preempt_enable_no_resched();
 
-	hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
 		hlist_del(&ri->hlist);
 		kfree(ri);
 	}
diff --git a/arch/s390/pci/pci_msi.c b/arch/s390/pci/pci_msi.c
index 90fd3482b9e2..0297931335e1 100644
--- a/arch/s390/pci/pci_msi.c
+++ b/arch/s390/pci/pci_msi.c
@@ -25,10 +25,9 @@ static DEFINE_SPINLOCK(msi_map_lock);
 
 struct msi_desc *__irq_get_msi_desc(unsigned int irq)
 {
-	struct hlist_node *entry;
 	struct msi_map *map;
 
-	hlist_for_each_entry_rcu(map, entry,
+	hlist_for_each_entry_rcu(map,
 			&msi_hash[msi_hashfn(irq)], msi_chain)
 		if (map->irq == irq)
 			return map->msi;
diff --git a/arch/score/Kconfig b/arch/score/Kconfig
index 3b1482e7afac..e569aa1fd2ba 100644
--- a/arch/score/Kconfig
+++ b/arch/score/Kconfig
@@ -12,6 +12,7 @@ config SCORE
        select GENERIC_CPU_DEVICES
        select GENERIC_CLOCKEVENTS
        select HAVE_MOD_ARCH_SPECIFIC
+	select HAVE_VIRT_TO_BUS
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
 
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index ef6717a64bc7..5e859633ce69 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -148,9 +148,6 @@ config ARCH_HAS_ILOG2_U32
 config ARCH_HAS_ILOG2_U64
 	def_bool n
 
-config ARCH_NO_VIRT_TO_BUS
-	def_bool y
-
 config ARCH_HAS_DEFAULT_IDLE
 	def_bool y
 
diff --git a/arch/sh/kernel/kprobes.c b/arch/sh/kernel/kprobes.c
index 1208b09e95c3..42b46e61a2d5 100644
--- a/arch/sh/kernel/kprobes.c
+++ b/arch/sh/kernel/kprobes.c
@@ -310,7 +310,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 {
 	struct kretprobe_instance *ri = NULL;
 	struct hlist_head *head, empty_rp;
-	struct hlist_node *node, *tmp;
+	struct hlist_node *tmp;
 	unsigned long flags, orig_ret_address = 0;
 	unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline;
 
@@ -330,7 +330,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 	 *       real return address, and all the rest will point to
 	 *       kretprobe_trampoline
 	 */
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -360,7 +360,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 
 	preempt_enable_no_resched();
 
-	hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
 		hlist_del(&ri->hlist);
 		kfree(ri);
 	}
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 58fb1e3f631d..289127d5241c 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -146,9 +146,6 @@ config GENERIC_GPIO
 	help
 	  Generic GPIO API support
 
-config ARCH_NO_VIRT_TO_BUS
-	def_bool y
-
 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 	def_bool y if SPARC64
 
diff --git a/arch/sparc/kernel/kprobes.c b/arch/sparc/kernel/kprobes.c
index a39d1ba5a119..e72212148d2a 100644
--- a/arch/sparc/kernel/kprobes.c
+++ b/arch/sparc/kernel/kprobes.c
@@ -511,7 +511,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 {
 	struct kretprobe_instance *ri = NULL;
 	struct hlist_head *head, empty_rp;
-	struct hlist_node *node, *tmp;
+	struct hlist_node *tmp;
 	unsigned long flags, orig_ret_address = 0;
 	unsigned long trampoline_address =(unsigned long)&kretprobe_trampoline;
 
@@ -531,7 +531,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 	 *       real return address, and all the rest will point to
 	 *       kretprobe_trampoline
 	 */
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -559,7 +559,7 @@ int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
 	kretprobe_hash_unlock(current, &flags);
 	preempt_enable_no_resched();
 
-	hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
 		hlist_del(&ri->hlist);
 		kfree(ri);
 	}
diff --git a/arch/sparc/kernel/ldc.c b/arch/sparc/kernel/ldc.c
index 9fcc6b4e93b3..54df554b82d9 100644
--- a/arch/sparc/kernel/ldc.c
+++ b/arch/sparc/kernel/ldc.c
@@ -953,9 +953,8 @@ static HLIST_HEAD(ldc_channel_list);
 static int __ldc_channel_exists(unsigned long id)
 {
 	struct ldc_channel *lp;
-	struct hlist_node *n;
 
-	hlist_for_each_entry(lp, n, &ldc_channel_list, list) {
+	hlist_for_each_entry(lp, &ldc_channel_list, list) {
 		if (lp->id == id)
 			return 1;
 	}
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 4ce6e4c390e0..ff496ab1e794 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -17,6 +17,7 @@ config TILE
 	select GENERIC_IRQ_SHOW
 	select HAVE_DEBUG_BUGVERBOSE
 	select HAVE_SYSCALL_WRAPPERS if TILEGX
+	select HAVE_VIRT_TO_BUS
 	select SYS_HYPERVISOR
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_CLOCKEVENTS
diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 60651df5f952..dc50b157fc83 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -9,6 +9,7 @@ config UNICORE32
 	select GENERIC_ATOMIC64
 	select HAVE_KERNEL_LZO
 	select HAVE_KERNEL_LZMA
+	select HAVE_VIRT_TO_BUS
 	select ARCH_HAVE_CUSTOM_GPIO_H
 	select GENERIC_FIND_FIRST_BIT
 	select GENERIC_IRQ_PROBE
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 6a9383370311..a4f24f5b1218 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -112,6 +112,7 @@ config X86
 	select GENERIC_STRNLEN_USER
 	select HAVE_CONTEXT_TRACKING if X86_64
 	select HAVE_IRQ_TIME_ACCOUNTING
+	select HAVE_VIRT_TO_BUS
 	select MODULES_USE_ELF_REL if X86_32
 	select MODULES_USE_ELF_RELA if X86_64
 	select CLONE_BACKWARDS if X86_32
diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index e124554598ee..3f06e6149981 100644
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -652,7 +652,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
 {
 	struct kretprobe_instance *ri = NULL;
 	struct hlist_head *head, empty_rp;
-	struct hlist_node *node, *tmp;
+	struct hlist_node *tmp;
 	unsigned long flags, orig_ret_address = 0;
 	unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline;
 	kprobe_opcode_t *correct_ret_addr = NULL;
@@ -682,7 +682,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
 	 *	 will be the real return address, and all the rest will
 	 *	 point to kretprobe_trampoline.
 	 */
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -701,7 +701,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
 	kretprobe_assert(ri, orig_ret_address, trampoline_address);
 
 	correct_ret_addr = ri->ret_addr;
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task != current)
 			/* another task is sharing our hash bucket */
 			continue;
@@ -728,7 +728,7 @@ static __used __kprobes void *trampoline_handler(struct pt_regs *regs)
 
 	kretprobe_hash_unlock(current, &flags);
 
-	hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
 		hlist_del(&ri->hlist);
 		kfree(ri);
 	}
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 4ed3edbe06bd..956ca358108a 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1644,13 +1644,13 @@ static int kvm_mmu_prepare_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp,
 static void kvm_mmu_commit_zap_page(struct kvm *kvm,
 				    struct list_head *invalid_list);
 
-#define for_each_gfn_sp(kvm, sp, gfn, pos)				\
-  hlist_for_each_entry(sp, pos,						\
+#define for_each_gfn_sp(kvm, sp, gfn)					\
+  hlist_for_each_entry(sp,						\
    &(kvm)->arch.mmu_page_hash[kvm_page_table_hashfn(gfn)], hash_link)	\
 	if ((sp)->gfn != (gfn)) {} else
 
-#define for_each_gfn_indirect_valid_sp(kvm, sp, gfn, pos)		\
-  hlist_for_each_entry(sp, pos,						\
+#define for_each_gfn_indirect_valid_sp(kvm, sp, gfn)			\
+  hlist_for_each_entry(sp,						\
    &(kvm)->arch.mmu_page_hash[kvm_page_table_hashfn(gfn)], hash_link)	\
 		if ((sp)->gfn != (gfn) || (sp)->role.direct ||		\
 			(sp)->role.invalid) {} else
@@ -1706,11 +1706,10 @@ static int kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 static void kvm_sync_pages(struct kvm_vcpu *vcpu,  gfn_t gfn)
 {
 	struct kvm_mmu_page *s;
-	struct hlist_node *node;
 	LIST_HEAD(invalid_list);
 	bool flush = false;
 
-	for_each_gfn_indirect_valid_sp(vcpu->kvm, s, gfn, node) {
+	for_each_gfn_indirect_valid_sp(vcpu->kvm, s, gfn) {
 		if (!s->unsync)
 			continue;
 
@@ -1848,7 +1847,6 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
 	union kvm_mmu_page_role role;
 	unsigned quadrant;
 	struct kvm_mmu_page *sp;
-	struct hlist_node *node;
 	bool need_sync = false;
 
 	role = vcpu->arch.mmu.base_role;
@@ -1863,7 +1861,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
 		quadrant &= (1 << ((PT32_PT_BITS - PT64_PT_BITS) * level)) - 1;
 		role.quadrant = quadrant;
 	}
-	for_each_gfn_sp(vcpu->kvm, sp, gfn, node) {
+	for_each_gfn_sp(vcpu->kvm, sp, gfn) {
 		if (!need_sync && sp->unsync)
 			need_sync = true;
 
@@ -2151,14 +2149,13 @@ void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int goal_nr_mmu_pages)
 int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn)
 {
 	struct kvm_mmu_page *sp;
-	struct hlist_node *node;
 	LIST_HEAD(invalid_list);
 	int r;
 
 	pgprintk("%s: looking for gfn %llx\n", __func__, gfn);
 	r = 0;
 	spin_lock(&kvm->mmu_lock);
-	for_each_gfn_indirect_valid_sp(kvm, sp, gfn, node) {
+	for_each_gfn_indirect_valid_sp(kvm, sp, gfn) {
 		pgprintk("%s: gfn %llx role %x\n", __func__, gfn,
 			 sp->role.word);
 		r = 1;
@@ -2288,9 +2285,8 @@ static void __kvm_unsync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
 static void kvm_unsync_pages(struct kvm_vcpu *vcpu,  gfn_t gfn)
 {
 	struct kvm_mmu_page *s;
-	struct hlist_node *node;
 
-	for_each_gfn_indirect_valid_sp(vcpu->kvm, s, gfn, node) {
+	for_each_gfn_indirect_valid_sp(vcpu->kvm, s, gfn) {
 		if (s->unsync)
 			continue;
 		WARN_ON(s->role.level != PT_PAGE_TABLE_LEVEL);
@@ -2302,10 +2298,9 @@ static int mmu_need_write_protect(struct kvm_vcpu *vcpu, gfn_t gfn,
 				  bool can_unsync)
 {
 	struct kvm_mmu_page *s;
-	struct hlist_node *node;
 	bool need_unsync = false;
 
-	for_each_gfn_indirect_valid_sp(vcpu->kvm, s, gfn, node) {
+	for_each_gfn_indirect_valid_sp(vcpu->kvm, s, gfn) {
 		if (!can_unsync)
 			return 1;
 
@@ -3933,7 +3928,6 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 	gfn_t gfn = gpa >> PAGE_SHIFT;
 	union kvm_mmu_page_role mask = { .word = 0 };
 	struct kvm_mmu_page *sp;
-	struct hlist_node *node;
 	LIST_HEAD(invalid_list);
 	u64 entry, gentry, *spte;
 	int npte;
@@ -3964,7 +3958,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 	kvm_mmu_audit(vcpu, AUDIT_PRE_PTE_WRITE);
 
 	mask.cr0_wp = mask.cr4_pae = mask.nxe = 1;
-	for_each_gfn_indirect_valid_sp(vcpu->kvm, sp, gfn, node) {
+	for_each_gfn_indirect_valid_sp(vcpu->kvm, sp, gfn) {
 		if (detect_write_misaligned(sp, gpa, bytes) ||
 		      detect_write_flooding(sp)) {
 			zap_page |= !!kvm_mmu_prepare_zap_page(vcpu->kvm, sp,
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index a5c0663c2cdc..35876ffac11d 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -9,6 +9,7 @@ config XTENSA
 	select HAVE_IDE
 	select GENERIC_ATOMIC64
 	select HAVE_GENERIC_HARDIRQS
+	select HAVE_VIRT_TO_BUS
 	select GENERIC_IRQ_SHOW
 	select GENERIC_CPU_DEVICES
 	select MODULES_USE_ELF_RELA