vfs: d_obtain_alias() needs to use "/" as default name.

NFS appears to use d_obtain_alias() to create the root dentry rather than
d_make_root.  This can cause 'prepend_path()' to complain that the root
has a weird name if an NFS filesystem is lazily unmounted.  e.g.  if
"/mnt" is an NFS mount then

 { cd /mnt; umount -l /mnt ; ls -l /proc/self/cwd; }

will cause a WARN message like
   WARNING: at /home/git/linux/fs/dcache.c:2624 prepend_path+0x1d7/0x1e0()
   ...
   Root dentry has weird name <>

to appear in kernel logs.

So change d_obtain_alias() to use "/" rather than "" as the anonymous
name.

Signed-off-by: NeilBrown <neilb@suse.de>
Cc: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

selinux: fix sel_netnode_insert() suspicious rcu dereference

===============================
[ INFO: suspicious RCU usage. ]
3.5.0-rc1+ #63 Not tainted
-------------------------------
security/selinux/netnode.c:178 suspicious rcu_dereference_check() usage!

other info that might help us debug this:

rcu_scheduler_active = 1, debug_locks = 0
1 lock held by trinity-child1/8750:
 #0:  (sel_netnode_lock){+.....}, at: [<ffffffff812d8f8a>] sel_netnode_sid+0x16a/0x3e0

stack backtrace:
Pid: 8750, comm: trinity-child1 Not tainted 3.5.0-rc1+ #63
Call Trace:
 [<ffffffff810cec2d>] lockdep_rcu_suspicious+0xfd/0x130
 [<ffffffff812d91d1>] sel_netnode_sid+0x3b1/0x3e0
 [<ffffffff812d8e20>] ? sel_netnode_find+0x1a0/0x1a0
 [<ffffffff812d24a6>] selinux_socket_bind+0xf6/0x2c0
 [<ffffffff810cd1dd>] ? trace_hardirqs_off+0xd/0x10
 [<ffffffff810cdb55>] ? lock_release_holdtime.part.9+0x15/0x1a0
 [<ffffffff81093841>] ? lock_hrtimer_base+0x31/0x60
 [<ffffffff812c9536>] security_socket_bind+0x16/0x20
 [<ffffffff815550ca>] sys_bind+0x7a/0x100
 [<ffffffff816c03d5>] ? sysret_check+0x22/0x5d
 [<ffffffff810d392d>] ? trace_hardirqs_on_caller+0x10d/0x1a0
 [<ffffffff8133b09e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
 [<ffffffff816c03a9>] system_call_fastpath+0x16/0x1b

This patch below does what Paul McKenney suggested in the previous thread.

Signed-off-by: Dave Jones <davej@redhat.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Eric Paris <eparis@parisplace.org>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

CRIS: Fix I/O macros

The inb/outb macros for CRIS are broken from a number of points of view,
missing () around parameters and they have an unprotected if statement in
them.  This was breaking the compile of IPMI on CRIS and thus I was being
annoyed by build regressions, so I fixed them.

Plus I don't think they would have worked at all, since the data values
were missing "&" and the outsl had a "3" instead of a "4" for the size.
From what I can tell, this stuff is not used at all, so this can't be any
more broken than it was before, anyway.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Mikael Starvik <starvik@axis.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

idr-rename-max_level-to-max_idr_level-fix-3

Cc: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

pwm-backlight: take over maintenance

Since the pwm-backlight driver is lacking a proper maintainer and is the
heaviest user of the PWM framework I'm taking over maintenance.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Cc: Arun Murthy <arun.murthy@stericsson.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Robert Morell <rmorell@nvidia.com>
Cc: Dilan Lee <dilee@nvidia.com>
Cc: Axel Lin <axel.lin@gmail.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Merge remote-tracking branch 'signal/for-next'

Conflicts:
arch/alpha/Kconfig
arch/arm/Kconfig
arch/arm/include/asm/thread_info.h
arch/c6x/Kconfig
arch/cris/include/asm/Kbuild
arch/h8300/include/asm/Kbuild
arch/m32r/include/asm/Kbuild
arch/m68k/Kconfig
arch/mn10300/Kconfig
arch/powerpc/Kconfig
arch/s390/Kconfig
arch/x86/Kconfig
arch/x86/kernel/process_32.c
arch/x86/kernel/signal.c

Merge remote-tracking branch 'userns/for-next'

Conflicts:
fs/ubifs/debug.c
init/Kconfig
kernel/audit.c
kernel/auditsc.c
security/integrity/ima/ima_policy.c

Merge remote-tracking branch 'pwm/for-next'

Merge remote-tracking branch 'dma-mapping/dma-mapping-next'

Conflicts:
Documentation/devicetree/bindings/ata/ahci-platform.txt
arch/arm/boot/dts/highbank.dts

Merge remote-tracking branch 'kvmtool/master'

Merge remote-tracking branch 'samsung/for-next'

Conflicts:
arch/arm/mach-exynos/Makefile.boot

Merge remote-tracking branch 'renesas/next'

Merge remote-tracking branch 'msm/for-next'

Conflicts:
arch/arm/mach-msm/board-dt-8660.c
arch/arm/mach-msm/board-dt-8960.c
arch/arm/mach-msm/common.h
arch/arm/mach-vt8500/include/mach/restart.h

Merge remote-tracking branch 'ixp4xx/next'

Conflicts:
arch/arm/mach-ixp4xx/common.c
arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h

Merge remote-tracking branch 'ep93xx/ep93xx-for-next'

Merge remote-tracking branch 'arm-soc/for-next'

Conflicts:
Documentation/devicetree/bindings/usb/platform-uhci.txt
arch/arm/mach-davinci/davinci.h
arch/arm/mach-davinci/dm355.c
arch/arm/mach-davinci/dm365.c
arch/arm/mach-davinci/include/mach/da8xx.h
arch/arm/mach-imx/clk-imx51-imx53.c
arch/arm/mach-integrator/integrator_cp.c
arch/arm/mach-omap2/board-rx51-peripherals.c
arch/arm/mach-s3c64xx/mach-mini6410.c
arch/arm/mach-s3c64xx/mach-real6410.c
arch/arm/mach-shmobile/include/mach/common.h
arch/arm/mach-tegra/devices.c
arch/arm/mach-ux500/cpu-db8500.c
arch/arm/mach-vt8500/bv07.c
arch/arm/mach-vt8500/devices-vt8500.c
arch/arm/mach-vt8500/devices-wm8505.c
arch/arm/mach-vt8500/devices.c
arch/arm/mach-vt8500/devices.h
arch/arm/mach-vt8500/wm8505_7in.c
drivers/clocksource/Makefile
drivers/dma/mmp_tdma.c
drivers/i2c/busses/i2c-omap.c
drivers/input/keyboard/omap-keypad.c
drivers/mmc/host/davinci_mmc.c
drivers/mmc/host/omap.c
drivers/mtd/nand/Kconfig
drivers/mtd/nand/bcm_umi_nand.c
drivers/mtd/nand/nand_bcm_umi.h
drivers/mtd/nand/orion_nand.c
drivers/pinctrl/Makefile
drivers/spi/spi-davinci.c
drivers/staging/tidspbridge/core/wdt.c
drivers/usb/host/Kconfig
drivers/video/msm/mddi.c
drivers/video/msm/mdp.c
drivers/video/msm/mdp_hw.h
drivers/video/omap/lcd_ams_delta.c
drivers/video/omap2/dss/dispc.c
drivers/w1/masters/omap_hdq.c
sound/soc/omap/igep0020.c
sound/soc/omap/omap-mcbsp.c
sound/soc/omap/omap-pcm.c
sound/soc/omap/omap3beagle.c
sound/soc/omap/omap3evm.c
sound/soc/omap/overo.c

Merge remote-tracking branch 'gpio-lw/for-next'

Merge remote-tracking branch 'remoteproc/for-next'

Merge remote-tracking branch 'vhost/linux-next'

Conflicts:
drivers/net/tun.c

Merge remote-tracking branch 'pinctrl/for-next'

Merge remote-tracking branch 'writeback/writeback-for-next'

Merge remote-tracking branch 'tmem/linux-next'

Merge remote-tracking branch 'char-misc/char-misc-next'

Merge remote-tracking branch 'staging/staging-next'

Conflicts:
drivers/staging/Kconfig
drivers/staging/Makefile
drivers/staging/android/binder.c
drivers/staging/ipack/devices/ipoctal.c
drivers/staging/omap-thermal/omap-thermal-common.c
drivers/staging/serqt_usb2/serqt_usb2.c

Merge remote-tracking branch 'usb/usb-next'

Conflicts:
drivers/usb/core/usb-acpi.c
drivers/usb/serial/digi_acceleport.c
drivers/usb/serial/io_edgeport.c
drivers/usb/serial/io_ti.c
drivers/usb/serial/kl5kusb105.c
drivers/usb/serial/mos7720.c
drivers/usb/serial/mos7840.c

Revert "compat_ioctl: Add RS-485 IOCTLs to the list"

This reverts commit 84c3b84860440a9e3a3666c14112f41311b8f623.

Merge remote-tracking branch 'tty/tty-next'

Conflicts:
drivers/tty/serial/omap-serial.c

Merge remote-tracking branch 'driver-core/driver-core-next'

Merge remote-tracking branch 'leds/for-next'

Merge remote-tracking branch 'regmap/for-next'

Merge remote-tracking branch 'drivers-x86/linux-next'

Merge remote-tracking branch 'workqueues/for-next'

Conflicts:
drivers/hid/hid-picolcd.c
drivers/isdn/mISDN/hwchannel.c
drivers/thermal/thermal_sys.c
drivers/video/omap2/displays/panel-taal.c

Merge remote-tracking branch 'xen-two/linux-next'

Merge remote-tracking branch 'kvm-ppc/kvm-ppc-next'

Merge remote-tracking branch 'kvm/linux-next'

Conflicts:
arch/s390/include/asm/processor.h
arch/x86/kvm/i8259.c

Merge remote-tracking branch 'kmemleak/kmemleak'

Merge remote-tracking branch 'rcu/rcu/next'

Conflicts:
arch/Kconfig
arch/x86/Kconfig
kernel/rcutree.h
kernel/rcutree_plugin.h
kernel/sched/core.c

Merge remote-tracking branch 'tip/auto-latest'

Conflicts:
arch/Kconfig
arch/s390/Kconfig

Merge remote-tracking branch 'spi-mb/spi-next'

Conflicts:
drivers/mmc/host/mxs-mmc.c

Merge remote-tracking branch 'dt-rh/for-next'

Merge remote-tracking branch 'edac-amd/for-next'

Conflicts:
Documentation/edac.txt
drivers/edac/amd64_edac.c

Merge remote-tracking branch 'edac/linux_next'

Conflicts:
drivers/edac/edac_mc.c

Merge remote-tracking branch 'fsnotify/for-next'

Conflicts:
kernel/audit_tree.c

Merge commit 'refs/next/20120924/pm'

Conflicts:
drivers/cpufreq/powernow-k8.c

Merge remote-tracking branch 'trivial/for-next'

Conflicts:
drivers/scsi/ipr.c
drivers/video/backlight/88pm860x_bl.c

Merge remote-tracking branch 'osd/linux-next'

Merge remote-tracking branch 'iommu/next'

Merge remote-tracking branch 'watchdog/master'

Merge remote-tracking branch 'selinux/master'

Merge remote-tracking branch 'security/next'

Merge remote-tracking branch 'regulator/for-next'

Conflicts:
Documentation/devicetree/bindings/regulator/tps6586x.txt

Merge remote-tracking branch 'omap_dss2/for-next'

Merge remote-tracking branch 'fbdev/fbdev-next'

Merge remote-tracking branch 'battery/master'

Conflicts:
include/linux/mfd/88pm860x.h

Merge commit 'refs/next/20120924/mfd'

Conflicts:
Documentation/devicetree/bindings/regulator/tps6586x.txt
drivers/mfd/88pm860x-core.c
drivers/mfd/max8925-core.c
drivers/mfd/tc3589x.c
drivers/regulator/anatop-regulator.c

Merge commit 'refs/next/20120924/md'

Conflicts:
drivers/md/raid0.c
fs/bio.c

Merge remote-tracking branch 'slab/for-next'

Merge remote-tracking branch 'kgdb/kgdb-next'

Merge remote-tracking branch 'mmc/mmc-next'

Merge branch 'quilt/device-mapper'

Merge remote-tracking branch 'block/for-next'

Merge remote-tracking branch 'cgroup/for-next'

Merge remote-tracking branch 'input/next'

Merge branch 'quilt/rr'

Merge remote-tracking branch 'sound-asoc/for-next'

Merge remote-tracking branch 'sound/for-next'

Conflicts:
arch/arm/mach-imx/mach-imx27_visstrim_m10.c

Merge remote-tracking branch 'drm/drm-next'

Conflicts:
drivers/gpu/drm/i915/i915_dma.c
drivers/gpu/drm/i915/intel_sdvo.c

Merge remote-tracking branch 'crypto/master'

Conflicts:
crypto/Kconfig

Merge remote-tracking branch 'l2-mtd/master'

Merge remote-tracking branch 'mtd/master'

Merge remote-tracking branch 'wireless-next/master'

Merge remote-tracking branch 'net-next/master'

Conflicts:
drivers/net/team/team.c
drivers/net/usb/qmi_wwan.c
net/ipv4/fib_frontend.c
net/ipv4/raw.c
net/ipv4/route.c
net/socket.c

Merge remote-tracking branch 'slave-dma/next'

Merge remote-tracking branch 'target-updates/for-next'

Merge remote-tracking branch 'scsi/for-next'

Conflicts:
drivers/scsi/ipr.c
drivers/scsi/qla2xxx/qla_nx.c

Merge remote-tracking branch 'dlm/next'

Merge remote-tracking branch 'ubi/linux-next'

Merge remote-tracking branch 'thermal/next'

Merge remote-tracking branch 'cpuidle/cpuidle-next'

Conflicts:
drivers/cpuidle/coupled.c
include/linux/cpuidle.h

Merge remote-tracking branch 'acpi/next'

Merge remote-tracking branch 'pstore/master'

Merge remote-tracking branch 'infiniband/for-next'

Merge remote-tracking branch 'libata/NEXT'

Merge remote-tracking branch 'kconfig/for-next'

Merge remote-tracking branch 'kbuild/for-next'

Merge remote-tracking branch 'v4l-dvb/master'

Conflicts:
arch/arm/mach-imx/mach-imx27_visstrim_m10.c

Merge remote-tracking branch 'hwmon-staging/hwmon-next'

Merge branch 'quilt/jdelvare-hwmon'

Merge remote-tracking branch 'i2c-embedded/i2c-embedded/for-next'

Merge branch 'quilt/i2c'

Merge remote-tracking branch 'hid/for-next'

Merge remote-tracking branch 'galak/next'

Merge remote-tracking branch 'mpc5xxx/next'

Merge remote-tracking branch 'powerpc/next'

Merge remote-tracking branch 'pci/next'

Merge remote-tracking branch 'vfs/for-next'

Conflicts:
fs/stat.c
kernel/events/core.c

Merge remote-tracking branch 'xfs/for-next'

Merge remote-tracking branch 'ubifs/linux-next'

Merge remote-tracking branch 'v9fs/for-next'

Merge remote-tracking branch 'ocfs2/linux-next'