Here is a bugfix to d_path.

First, when d_path() hits a lazily unmounted mount point, it tries to
prepend the name of the lazily unmounted dentry to the path name.  It gets
this wrong, and also overwrites the slash that separates the name from the
following pathname component.  This is demonstrated by the attached test
case, which prints "getcwd returned d_path-bugsubdir" with the bug.  The
correct result would be "getcwd returned d_path-bug/subdir".

It could be argued that the name of the root dentry should not be part of
the result of d_path in the first place.  On the other hand, what the
unconnected namespace was once reachable as may provide some useful hints
to users, and so that seems okay.

Second, it isn't always possible to tell from the __d_path result whether
the specified root and rootmnt (i.e., the chroot) was reached: lazy
unmounts of bind mounts will produce a path that does start with a
non-slash so we can tell from that, but other lazy unmounts will produce a
path that starts with a slash, just like "ordinary" paths.

The attached patch cleans up __d_path() to fix the bug with overlapping
pathname components.  It also adds a @fail_deleted argument, which allows
to get rid of some of the mess in sys_getcwd().  Grabbing the dcache_lock
can then also be moved into __d_path().  The patch also makes sure that
paths will only start with a slash for paths which are connected to the
root and rootmnt.

The @fail_deleted argument could be added to d_path() as well: this would
allow callers to recognize deleted files, without having to resort to the
ambiguous check for the " (deleted)" string at the end of the pathnames.
This is not currently done, but it might be worthwhile.
Signed-off-by: NAndreas Gruenbacher <agruen@suse.de>
Cc: Neil Brown <neilb@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Replace the incorrect debugging check of "#ifdef NTFS_DEBUG" with
just "#ifdef DEBUG".
Signed-off-by: NRobert P. J. Day <rpjday@mindspring.com>
Acked-by: NAnton Altaparmakov <aia21@cantab.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

As pointed out in http://bugzilla.kernel.org/show_bug.cgi?id=7922, dynamic
blockdev major allocation can hand out majors which LANANA has defined as
being for local/experimental use.

Cc: Torben Mathiasen <device@lanana.org>
Cc: Greg KH <greg@kroah.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Tomas Klas <tomas.klas@mepatek.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

As pointed out in http://bugzilla.kernel.org/show_bug.cgi?id=7922, dynamic
chardev major allocation can hand out majors which LANANA has defined as being
for local/experimental use.

Cc: Torben Mathiasen <device@lanana.org>
Cc: Greg KH <greg@kroah.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Tomas Klas <tomas.klas@mepatek.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Don't hide buffer_unwritten behind buffer_delay() and remove the hack that
clears unexpected buffer_unwritten() states now that it can't happen.
Signed-off-by: NDave Chinner <dgc@sgi.com>
Acked-by: NChristoph Hellwig <hch@lst.de>
Cc: Timothy Shimmin <tes@sgi.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Currently, XFS uses BH_PrivateStart for flagging unwritten extent state in a
bufferhead.  Recently, I found the long standing mmap/unwritten extent
conversion bug, and it was to do with partial page invalidation not clearing
the unwritten flag from bufferheads attached to the page but beyond EOF.  See
here for a full explaination:

http://oss.sgi.com/archives/xfs/2006-12/msg00196.html

The solution I have checked into the XFS dev tree involves duplicating code
from block_invalidatepage to clear the unwritten flag from the bufferhead(s),
and then calling block_invalidatepage() to do the rest.

Christoph suggested that this would be better solved by pushing the unwritten
flag into the common buffer head flags and just adding the call to
discard_buffer():

http://oss.sgi.com/archives/xfs/2006-12/msg00239.html

The following patch makes BH_Unwritten a first class citizen.
Signed-off-by: NDave Chinner <dgc@sgi.com>
Acked-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Make mincore work for anon mappings, nonlinear, and migration entries.
Based on patch from Linus Torvalds <torvalds@linux-foundation.org>.
Signed-off-by: NNick Piggin <npiggin@suse.de>
Acked-by: NHugh Dickins <hugh@veritas.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add a NOPFN_REFAULT return code for vm_ops->nopfn() equivalent to
NOPAGE_REFAULT for vmops->nopage() indicating that the handler requests a
re-execution of the faulting instruction
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add a vm_insert_pfn helper, so that ->fault handlers can have nopfn
functionality by installing their own pte and returning NULL.
Signed-off-by: NNick Piggin <npiggin@suse.de>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit 40b20c25 by Len Brown introduced
a null pointer dereference in the appledisplay driver. This patch fixes
it.
Signed-off-by: NMichael Hanselmann <linux-kernel@hansmi.ch>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <greg@kroah.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit 9ac7849e causes this on S390:

  drivers/built-in.o: In function `dmam_noncoherent_release':
    dma-mapping.c:(.text+0x1515c): undefined reference to `dma_free_noncoherent'
  drivers/built-in.o: In function `dmam_free_noncoherent':
    undefined reference to `dma_free_noncoherent'
  drivers/built-in.o: In function `dmam_alloc_noncoherent':
    undefined reference to `dma_alloc_noncoherent'
  make: *** [.tmp_vmlinux1] Error 1

Cc: Tejun Heo <htejun@gmail.com>
Acked-by: NJeff Garzik <jeff@garzik.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This improves performance considerably for sync requests when you
have command queuing enabled.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

We only really need it for a process going away, so move it to
those locations.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

Makes it more fair for the residual slice count.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

We currently check the FIFO once per slice. Optimize that a bit and
only do it as the first thing for a new slice, so we don't end up
doing a single request and then seek to the FIFO requests.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

It must always be the active queue, otherwise it's a bug. So just
use the active_queue, don't pass it in explicitly.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

If a slice uses less than it is entitled to (or perhaps more), include
that in the decision on how much time to give it the next time it
gets serviced.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

This better matches what time the queue is actually spending doing
IO.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

Right now we use slice_start, which gives async queues an unfair
advantage. Chance that to service_last, and base the resorter
on that.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

Move the on_rr check into cfq_resort_rr_list(), every call site
needs to check it anyway.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

It hasn't been used for a while, kill it off and remove the old
if 0 code chunk.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

Don't allow elv_dispatch_sort() to mix reads and writes together,
it's rarely a good idea.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

* git://oss.sgi.com:8090/xfs/xfs-2.6: (33 commits)
  [XFS] Don't use kmap in xfs_iozero.
  [XFS] Remove a bunch of unused functions from XFS.
  [XFS] Remove unused arguments from the XFS_BTREE_*_ADDR macros.
  [XFS] Remove unused header files for MAC and CAP checking functionality.
  [XFS] Make freeze code a little cleaner.
  [XFS] Remove unused argument to xfs_bmap_finish
  [XFS] Clean up use of VFS attr flags
  [XFS] Remove useless memory barrier
  [XFS] XFS sysctl cleanups
  [XFS] Fix assertion in xfs_attr_shortform_remove().
  [XFS] Fix callers of xfs_iozero() to zero the correct range.
  [XFS] Ensure a frozen filesystem has a clean log before writing the dummy
  [XFS] Fix sub-block zeroing for buffered writes into unwritten extents.
  [XFS] Re-initialize the per-cpu superblock counters after recovery.
  [XFS] Fix block reservation changes for non-SMP systems.
  [XFS] Fix block reservation mechanism.
  [XFS] Make growfs work for amounts greater than 2TB
  [XFS] Fix inode log item use-after-free on forced shutdown
  [XFS] Fix attr2 corruption with btree data extents
  [XFS] Workaround log space issue by increasing XFS_TRANS_PUSH_AIL_RESTARTS
  ...

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: remove scan_keyb driver
  Input: i8042 - fix AUX IRQ delivery check
  Input: wistron - add support for Fujitsu-Siemens Amilo D88x0
  Input: inport - use correct config option for ATIXL
  Input: HIL - handle erros from input_register_device()
  Input: tsdev - schedule removal
  Input: add Atlas button driver
  Input: ads7846 - be more compatible with the hwmon framework
  Input: ads7846 - detect pen up from GPIO state
  Input: ads7846 - select correct SPI mode
  Input: ads7846 - switch to using hrtimer
  Input: ads7846 - optionally leave Vref on during differential measurements
  Input: ads7846 - pluggable filtering logic
  Input: gpio-keys - keyboard driver for GPIO buttons
  Input: hid-ff - add support for Logitech Momo racing wheel
  Input: i8042 - really suppress ACK/NAK during panic blink
  Input: pc110pad - return proper error

Teach kernel-doc to handle functions that look like the new
pcim_iomap_table().  Fixes this fatal error in scripts/kernel-doc:

  DOCPROC Documentation/DocBook/kernel-api.xml
Error(/tester/linsrc/linux-2.6.20-git6//drivers/pci/pci.c:1351): cannot understand prototype: 'void __iomem * const * pcim_iomap_table(struct pci_dev *pdev) '
make[1]: *** [Documentation/DocBook/kernel-api.xml] Error 1
make: *** [htmldocs] Error 2
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (97 commits)
  [SCSI] zfcp: removed wrong comment
  [SCSI] zfcp: use of uninitialized variable
  [SCSI] zfcp: Invalid locking order
  [SCSI] aic79xx: use dma_get_required_mask()
  [SCSI] aic79xx: fix bracket mismatch in unused macro
  [SCSI] BusLogic: Replace 'boolean' by 'bool'
  [SCSI] advansys: clean up warnings
  [SCSI] 53c7xx: brackets fix in uncompiled code
  [SCSI] nsp_cs: remove old scsi code
  [SCSI] aic79xx: make ahd_match_scb() static
  [SCSI] DAC960: kmalloc->kzalloc/Casting cleanups
  [SCSI] scsi_kmap_atomic_sg(): check that local irqs are disabled
  [SCSI] Buslogic: local_irq_disable() is redundant after local_irq_save()
  [SCSI] aic94xx: update for v28 firmware
  [SCSI] scsi_error: Fix lost EH commands
  [SCSI] aic94xx: Add default bus reset handler
  [SCSI] aic94xx: Remove TMF result code munging
  [SCSI] libsas: Add an LU reset mechanism to the error handler
  [SCSI] libsas: Don't BUG when connecting two expanders via wide port
  [SCSI] st: fix Tape dies if wrong block size used, bug 7919
  ...

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] signal: do not inline handle_signal()
  [MIPS] signal: do not use save_static_function() anymore
  [MIPS] signal32: no need to save c0_status register in setup_sigcontext32()
  [MIPS] signal32: reduce {setup,restore}_sigcontext32 sizes
  [MIPS] signal: factorize debug code
  [MIPS] signal: test return value of install_sigtramp()
  [MIPS] signal32: remove duplicate code
  [MIPS] signal: clean up sigframe structure
  [MIPS] signal: do not inline functions in signal-common.h
  [MIPS] signals: reduce {setup,restore}_sigcontext sizes
  [MIPS] Fix warning in get_user when fetching pointer object from userspace.
  [MIPS] Fix eth2 platform device id for jaguar_atx and ocelot_3 platforms
  [MIPS] JMR3927 and RBTX49x7 support little endian
  [MIPS] RBTX49x7: declare prom_getcmdline()
  [MIPS] RTLX: Sprinkle device model code into code to make udev happier.
  [MIPS] VPE: Sprinkle device model code into code to make udev happier.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc:
  tifm_sd: treat "status error" as normal command completion
  mmc: wbsd: Remove stray kunmap_atomic()
  mmc: sdhci: Stop asking for mail
  mmc: sdhci: Remove driver version
  mmc: wbsd: Remove driver version

* master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (45 commits)
  [IPV4]: Restore multipath routing after rt_next changes.
  [XFRM] IPV6: Fix outbound RO transformation which is broken by IPsec tunnel patch.
  [NET]: Reorder fields of struct dst_entry
  [DECNET]: Convert decnet route to use the new dst_entry 'next' pointer
  [IPV6]: Convert ipv6 route to use the new dst_entry 'next' pointer
  [IPV4]: Convert ipv4 route to use the new dst_entry 'next' pointer
  [NET]: Introduce union in struct dst_entry to hold 'next' pointer
  [DECNET]: fix misannotation of linkinfo_dn
  [DECNET]: FRA_{DST,SRC} are le16 for decnet
  [UDP]: UDP can use sk_hash to speedup lookups
  [NET]: Fix whitespace errors.
  [NET] XFRM: Fix whitespace errors.
  [NET] X25: Fix whitespace errors.
  [NET] WANROUTER: Fix whitespace errors.
  [NET] UNIX: Fix whitespace errors.
  [NET] TIPC: Fix whitespace errors.
  [NET] SUNRPC: Fix whitespace errors.
  [NET] SCTP: Fix whitespace errors.
  [NET] SCHED: Fix whitespace errors.
  [NET] RXRPC: Fix whitespace errors.
  ...

* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Update defconfig.
  [SPARC64]: Add PCI MSI support on Niagara.
  [SPARC64] IRQ: Use irq_desc->chip_data instead of irq_desc->handler_data
  [SPARC64]: Add obppath sysfs attribute for SBUS and PCI devices.
  [PARTITION]: Add whole_disk attribute.

same as on sparc64
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Martin Schwidefsky wrote:
  "s390 does not even need (in|out)b(_p|).  I wondered what else from
   io.h do we not need.  The answer is: almost nothing.  With the devres
   patch from Al and the dma-mapping patch from Heiko we can get rid of
   iomem and all associated definitions."

So we'll just need to replace NO_IOPORT with NO_IOMEM in Kconfig and
kill arch/s390/mm/ioremap.c.

BTW, there's an annoying bit of junk in there - IO_SPACE_LIMIT.  We
only need it for /proc/ioports, which AFAICS shouldn't even be there
on s390 (or uml).  OTOH, removing that thing would mean a user-visible
change - we go from "empty file in /proc" to "no such file in /proc"...
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* Split the implementation-agnostic stuff in separate files.
* Make sure that targets using non-default request_irq() pull
  kernel/irq/devres.o
* Introduce new symbols (HAS_IOPORT and HAS_IOMEM) defaulting to positive;
  allow architectures to turn them off (we needed these symbols anyway for
  dependencies of quite a few drivers).
* protect the ioport-related parts of lib/devres.o with CONFIG_HAS_IOPORT.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix DocBook build.  Regression was introduced by
gregkh-usb-usb-linux-usb_ch9h-becomes-linux-usb-ch9h.patch

Tested by `make htmldocs`.
Signed-off-by: NDon Mullis <dwm@meer.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/isdn/gigaset/bas-gigaset.c: In function 'dump_urb':
drivers/isdn/gigaset/bas-gigaset.c:258: error: 'struct urb' has no member named 'bandwidth'

Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/char/amiserial.c::rs_write() contains local_irq_disable() after
local_save_flags().  Turn it into local_irq_save().
Signed-off-by: NJiri Kosina <jkosina@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>