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
  ...

Documentation/DMA-API-HOWTO.txt

@@ -488,9 +488,10 @@ will invoke the generic mapping error check interface. Doing so will ensure
 that the mapping code will work correctly on all dma implementations without
 any dependency on the specifics of the underlying implementation. Using the
 returned address without checking for errors could result in failures ranging
-from panics to silent data corruption. Couple of example of incorrect ways to
-check for errors that make assumptions about the underlying dma implementation
-are as follows and these are applicable to dma_map_page() as well.
+from panics to silent data corruption. A couple of examples of incorrect ways
+to check for errors that make assumptions about the underlying dma
+implementation are as follows and these are applicable to dma_map_page() as
+well.
 
 Incorrect example 1:
 	dma_addr_t dma_handle;
@@ -751,7 +752,7 @@ Example 1:
 		dma_unmap_single(dma_handle1);
 	map_error_handling1:
 
-Example 2: (if buffers are allocated a loop, unmap all mapped buffers when
+Example 2: (if buffers are allocated in a loop, unmap all mapped buffers when
 	    mapping error is detected in the middle)
 
 	dma_addr_t dma_addr;

Documentation/IPMI.txt

@@ -348,34 +348,40 @@ You can change this at module load time (for a module) with:
 
   modprobe ipmi_si.o type=<type1>,<type2>....
        ports=<port1>,<port2>... addrs=<addr1>,<addr2>...
-       irqs=<irq1>,<irq2>... trydefaults=[0|1]
+       irqs=<irq1>,<irq2>...
        regspacings=<sp1>,<sp2>,... regsizes=<size1>,<size2>,...
        regshifts=<shift1>,<shift2>,...
        slave_addrs=<addr1>,<addr2>,...
        force_kipmid=<enable1>,<enable2>,...
        kipmid_max_busy_us=<ustime1>,<ustime2>,...
        unload_when_empty=[0|1]
+       trydefaults=[0|1] trydmi=[0|1] tryacpi=[0|1]
+       tryplatform=[0|1] trypci=[0|1]
 
-Each of these except si_trydefaults is a list, the first item for the
+Each of these except try... items is a list, the first item for the
 first interface, second item for the second interface, etc.
 
 The si_type may be either "kcs", "smic", or "bt".  If you leave it blank, it
 defaults to "kcs".
 
-If you specify si_addrs as non-zero for an interface, the driver will
+If you specify addrs as non-zero for an interface, the driver will
 use the memory address given as the address of the device.  This
 overrides si_ports.
 
-If you specify si_ports as non-zero for an interface, the driver will
+If you specify ports as non-zero for an interface, the driver will
 use the I/O port given as the device address.
 
-If you specify si_irqs as non-zero for an interface, the driver will
+If you specify irqs as non-zero for an interface, the driver will
 attempt to use the given interrupt for the device.
 
-si_trydefaults sets whether the standard IPMI interface at 0xca2 and
+trydefaults sets whether the standard IPMI interface at 0xca2 and
 any interfaces specified by ACPE are tried.  By default, the driver
 tries it, set this value to zero to turn this off.
 
+The other try... items disable discovery by their corresponding
+names.  These are all enabled by default, set them to zero to disable
+them.  The tryplatform disables openfirmware.
+
 The next three parameters have to do with register layout.  The
 registers used by the interfaces may not appear at successive
 locations and they may not be in 8-bit registers.  These parameters

Documentation/blockdev/nbd.txt

@@ -4,43 +4,13 @@
    can use a remote server as one of its block devices. So every time
    the client computer wants to read, e.g., /dev/nb0, it sends a
    request over TCP to the server, which will reply with the data read.
-   This can be used for stations with low disk space (or even diskless -
-   if you boot from floppy) to borrow disk space from another computer.
-   Unlike NFS, it is possible to put any filesystem on it, etc. It should
-   even be possible to use NBD as a root filesystem (I've never tried),
-   but it requires a user-level program to be in the initrd to start.
-   It also allows you to run block-device in user land (making server
-   and client physically the same computer, communicating using loopback).
-
-   Current state: It currently works. Network block device is stable.
-   I originally thought that it was impossible to swap over TCP. It
-   turned out not to be true - swapping over TCP now works and seems
-   to be deadlock-free, but it requires heavy patches into Linux's
-   network layer.
-
+   This can be used for stations with low disk space (or even diskless)
+   to borrow disk space from another computer.
+   Unlike NFS, it is possible to put any filesystem on it, etc.
+
    For more information, or to download the nbd-client and nbd-server
    tools, go to http://nbd.sf.net/.
 
-   Howto: To setup nbd, you can simply do the following:
-
-   First, serve a device or file from a remote server:
-
-   nbd-server <port-number> <device-or-file-to-serve-to-client>
-
-   e.g.,
-	root@server1 # nbd-server 1234 /dev/sdb1
-
-	(serves sdb1 partition on TCP port 1234)
-
-   Then, on the local (client) system:
-
-   nbd-client <server-name-or-IP> <server-port-number> /dev/nb[0-n]
-
-   e.g.,
-	root@client1 # nbd-client server1 1234 /dev/nb0
-
-	(creates the nb0 device on client1)
-
    The nbd kernel module need only be installed on the client
    system, as the nbd-server is completely in userspace. In fact,
    the nbd-server has been successfully ported to other operating

Documentation/cgroups/blkio-controller.txt

@@ -75,7 +75,7 @@ Throttling/Upper Limit policy
         mount -t cgroup -o blkio none /sys/fs/cgroup/blkio
 
 - Specify a bandwidth rate on particular device for root group. The format
-  for policy is "<major>:<minor>  <byes_per_second>".
+  for policy is "<major>:<minor>  <bytes_per_second>".
 
         echo "8:16  1048576" > /sys/fs/cgroup/blkio/blkio.throttle.read_bps_device
 

MAINTAINERS

@@ -97,12 +97,13 @@ Descriptions of section entries:
 	   X:	net/ipv6/
 	   matches all files in and below net excluding net/ipv6/
 	K: Keyword perl extended regex pattern to match content in a
-	   patch or file.  For instance:
+	   patch or file, or an affected filename.  For instance:
 	   K: of_get_profile
-	      matches patches or files that contain "of_get_profile"
+	      matches patch or file content, or filenames, that contain
+	      "of_get_profile"
 	   K: \b(printk|pr_(info|err))\b
-	      matches patches or files that contain one or more of the words
-	      printk, pr_info or pr_err
+	      matches patch or file content, or filenames, that contain one or
+	      more of the words printk, pr_info or pr_err
 	   One regex pattern per line.  Multiple K: lines acceptable.
 
 Note: For the hard of thinking, this list is meant to remain in alphabetical
@@ -5437,6 +5438,7 @@ F:	net/netrom/
 NETWORK BLOCK DEVICE (NBD)
 M:	Paul Clements <Paul.Clements@steeleye.com>
 S:	Maintained
+L:	nbd-general@lists.sourceforge.net
 F:	Documentation/blockdev/nbd.txt
 F:	drivers/block/nbd.c
 F:	include/linux/nbd.h
@@ -7539,6 +7541,7 @@ STAGING - NVIDIA COMPLIANT EMBEDDED CONTROLLER INTERFACE (nvec)
 M:	Julian Andres Klode <jak@jak-linux.org>
 M:	Marc Dietrich <marvin24@gmx.de>
 L:	ac100@lists.launchpad.net (moderated for non-subscribers)
+L:	linux-tegra@vger.kernel.org
 S:	Maintained
 F:	drivers/staging/nvec/
 
@@ -7831,9 +7834,7 @@ L:	linux-tegra@vger.kernel.org
 Q:	http://patchwork.ozlabs.org/project/linux-tegra/list/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra.git
 S:	Supported
-F:	arch/arm/mach-tegra
-F:	arch/arm/boot/dts/tegra*
-F:	arch/arm/configs/tegra_defconfig
+K:	(?i)[^a-z]tegra
 
 TEHUTI ETHERNET DRIVER
 M:	Andy Gospodarek <andy@greyhouse.net>

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

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

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

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);
 	}

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

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

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

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

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",

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

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

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);
 	}

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

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