Commit graph

469014 commits

Author SHA1 Message Date
Trond Myklebust
4a3a0ebad1 Merge commit '24bab491220f' into client-4.2
- Pull in patch 'NFSD: Implement SEEK' from Bruce's nfsd-next tree
  for dependencies.
2014-09-30 16:23:39 -04:00
Anna Schumaker
24bab49122 NFSD: Implement SEEK
This patch adds server support for the NFS v4.2 operation SEEK, which
returns the position of the next hole or data segment in a file.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-29 14:35:20 -04:00
Anna Schumaker
87a15a8090 NFSD: Add generic v4.2 infrastructure
It's cleaner to introduce everything at once and have the server reply
with "not supported" than it would be to introduce extra operations when
implementing a specific one in the middle of the list.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-29 14:35:19 -04:00
Steve Wise
7e5be28827 svcrdma: advertise the correct max payload
Svcrdma currently advertises 1MB, which is too large.  The correct value
is the minimum of RPCSVC_MAXPAYLOAD and the max scatter-gather allowed
in an NFSRDMA IO chunk * the host page size. This bug is usually benign
because the Linux X64 NFSRDMA client correctly limits the payload size to
the correct value (64*4096 = 256KB).  But if the Linux client is PPC64
with a 64KB page size, then the client will indeed use a payload size
that will overflow the server.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-29 14:35:18 -04:00
Christoph Hellwig
0162ac2b97 nfsd: introduce nfsd4_callback_ops
Add a higher level abstraction than the rpc_ops for callback operations.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-26 16:29:29 -04:00
Christoph Hellwig
f0b5de1b6b nfsd: split nfsd4_callback initialization and use
Split out initializing the nfs4_callback structure from using it.  For
the NULL callback this gets rid of tons of pointless re-initializations.

Note that I don't quite understand what protects us from running multiple
NULL callbacks at the same time, but at least this chance doesn't make
it worse..

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-26 16:29:28 -04:00
Christoph Hellwig
326129d02a nfsd: introduce a generic nfsd4_cb
Add a helper to queue up a callback.  CB_NULL has a bit of special casing
because it is special in the specification, but all other new callback
operations will be able to share code with this and a few more changes
to refactor the callback code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-26 16:29:27 -04:00
Christoph Hellwig
2faf3b4350 nfsd: remove nfsd4_callback.cb_op
We can always get at the private data by using container_of, no need for
a void pointer.  Also introduce a little to_delegation helper to avoid
opencoding the container_of everywhere.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-26 16:29:26 -04:00
Benny Halevy
341b51df1f nfsd: do not clear rpc_resp in nfsd4_cb_done_sequence
This is incorrect when a callback is has to be restarted, in which case
the XDR decoding of the second iteration will see a NULL cb argument.

[hch: updated description]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-26 16:29:25 -04:00
Christoph Hellwig
444b6e910d nfsd: fix nfsd4_cb_recall_done error handling
For any error that is not EBADHANDLE or NFS4ERR_BAD_STATEID,
nfsd4_cb_recall_done first marks the connection down, then
retries until dl_retries hits zero, then marks the connection down
again and sets cb_done.  This changes the code to only retry
for EBADHANDLE or NFS4ERR_BAD_STATEID, and factors setting
cb_done into a single point in the function.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-26 16:29:25 -04:00
J. Bruce Fields
70b2823535 nfsd4: clarify how grace period ends
The grace period is ended in two steps--first userland is notified that
the grace period is now long enough that any clients who have not yet
reclaimed can be safely forgotten, then we flip the switch that forbids
reclaims and allows new opens.  I had to think a bit to convince myself
that the ordering was right here.  Document it.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-17 16:33:19 -04:00
J. Bruce Fields
bea57fe45b nfsd4: stop grace_time update at end of grace period
The attempt to automatically set a new grace period time at the end of
the grace period isn't really helpful.  We'll probably shut down and
reboot before we actually make use of the new grace period time anyway.
So may as well leave it up to the init system to get this right.

This just confuses people when they see /proc/fs/nfsd/nfsv4gracetime
change from what they set it to.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-17 16:33:18 -04:00
Jeff Layton
65decb650a nfsd: skip subsequent UMH "create" operations after the first one for v4.0 clients
In the case of v4.0 clients, we may call into the "create" client
tracking operation multiple times (once for each openowner). Upcalling
for each one of those is wasteful and slow however. We can skip doing
further "create" operations after the first one if we know that one has
already been done.

v4.1+ clients generally only call into this function once (on
RECLAIM_COMPLETE), and we can't skip upcalling on the create even if the
STABLE bit is set. Doing so would make it impossible for nfsdcltrack to
lift the grace period early since the timestamp has a different meaning
in the case where the client is expected to issue a RECLAIM_COMPLETE.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
2014-09-17 16:33:17 -04:00
Jeff Layton
788a7914ad nfsd: set and test NFSD4_CLIENT_STABLE bit to reduce nfsdcltrack upcalls
The nfsdcltrack upcall doesn't utilize the NFSD4_CLIENT_STABLE flag,
which basically results in an upcall every time we call into the client
tracking ops.

Change it to set this bit on a successful "check" or "create" request,
and clear it on a "remove" request.  Also, check to see if that bit is
set before upcalling on a "check" or "remove" request, and skip
upcalling appropriately, depending on its state.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
2014-09-17 16:33:17 -04:00
Jeff Layton
d682e750ce nfsd: serialize nfsdcltrack upcalls for a particular client
In a later patch, we want to add a flag that will allow us to reduce the
need for upcalls. In order to handle that correctly, we'll need to
ensure that racing upcalls for the same client can't occur. In practice
it should be rare for this to occur with a well-behaved client, but it
is possible.

Convert one of the bits in the cl_flags field to be an upcall bitlock,
and use it to ensure that upcalls for the same client are serialized.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
2014-09-17 16:33:16 -04:00
Jeff Layton
d4318acd5d nfsd: pass extra info in env vars to upcalls to allow for early grace period end
In order to support lifting the grace period early, we must tell
nfsdcltrack what sort of client the "create" upcall is for. We can't
reliably tell if a v4.0 client has completed reclaiming, so we can only
lift the grace period once all the v4.1+ clients have issued a
RECLAIM_COMPLETE and if there are no v4.0 clients.

Also, in order to lift the grace period, we have to tell userland when
the grace period started so that it can tell whether a RECLAIM_COMPLETE
has been issued for each client since then.

Since this is all optional info, we pass it along in environment
variables to the "init" and "create" upcalls. By doing this, we don't
need to revise the upcall format. The UMH upcall can simply make use of
this info if it happens to be present. If it's not then it can just
avoid lifting the grace period early.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
2014-09-17 16:33:15 -04:00
Jeff Layton
7f5ef2e900 nfsd: add a v4_end_grace file to /proc/fs/nfsd
Allow a privileged userland process to end the v4 grace period early.
Writing "Y", "y", or "1" to the file will cause the v4 grace period to
be lifted.  The basic idea with this will be to allow the userland
client tracking program to lift the grace period once it knows that no
more clients will be reclaiming state.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
2014-09-17 16:33:14 -04:00
Jeff Layton
d68e3c4aa4 lockd: add a /proc/fs/lockd/nlm_end_grace file
Add a new procfile that will allow a (privileged) userland process to
end the NLM grace period early. The basic idea here will be to have
sm-notify write to this file, if it sent out no NOTIFY requests when
it runs. In that situation, we can generally expect that there will be
no reclaim requests so the grace period can be lifted early.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
2014-09-17 16:33:13 -04:00
Jeff Layton
3b3e7b7223 nfsd: reject reclaim request when client has already sent RECLAIM_COMPLETE
As stated in RFC 5661, section 18.51.3:

    Once a RECLAIM_COMPLETE is done, there can be no further reclaim
    operations for locks whose scope is defined as having completed
    recovery.  Once the client sends RECLAIM_COMPLETE, the server will
    not allow the client to do subsequent reclaims of locking state for
    that scope and, if these are attempted, will return
    NFS4ERR_NO_GRACE.

Ensure that we enforce that requirement.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
2014-09-17 16:33:13 -04:00
Jeff Layton
919b8049f0 nfsd: remove redundant boot_time parm from grace_done client tracking op
Since it's stored in nfsd_net, we don't need to pass it in separately.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
2014-09-17 16:33:12 -04:00
Jeff Layton
f779002965 lockd: move lockd's grace period handling into its own module
Currently, all of the grace period handling is part of lockd. Eventually
though we'd like to be able to build v4-only servers, at which point
we'll need to put all of this elsewhere.

Move the code itself into fs/nfs_common and have it build a grace.ko
module. Then, rejigger the Kconfig options so that both nfsd and lockd
enable it automatically.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
2014-09-17 16:33:11 -04:00
Christoph Hellwig
f0c63124a6 nfsd: update mtime on truncate
This fixes a failure in xfstests generic/313 because nfs doesn't update
mtime on a truncate.  The protocol requires this to be done implicity
for a size changing setattr.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-09-11 11:12:16 -04:00
Linus Torvalds
2ce7598c9a Linux 3.17-rc4 2014-09-07 16:09:43 -07:00
Sudip Mukherjee
7e0dae61e2 Documentation: new page link in SubmittingPatches
new link for - How to piss off a Linux kernel subsystem maintainer

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-09-07 15:21:13 -07:00
Paul Bolle
731d5cca82 Documentation: NFS/RDMA: Document separate Kconfig symbols
The NFS/RDMA Kconfig symbol was split into separate options for client
and server in commit 2e8c12e1b7 ("xprtrdma: add separate Kconfig
options for NFSoRDMA client and server support").

Update the documentation to reflect this split.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "J. Bruce Fields" <bfields@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-09-07 15:21:13 -07:00
Masanari Iida
0024d6e9fd Documentation: misc-devices: Rename freefall.c from hpfall.c in lis2lv02d
hpfall.c was renamed to freefall.c in 3.16, but this file still refer to
hpfall.c instead of freefall.c

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-09-07 15:21:13 -07:00
Jose Manuel Alarcon Roldan
257d6ef4aa Documentation: i2c: rename variable "register" to "reg"
The example code provided with the i2c device interface documentation
won't compile since it uses the reserved word "register" to name a
variable.

The compiler fails with this error message:

 error: expected identifier or '(' before '=' token
   __u8 register = 0x20; /* Device register to access */
                 ^

Rename the variable "register" to simply "reg" in the example code.

Another couple of typos has been fixed as well.
[Change "! =" to "!=".]

Signed-off-by: Jose Alarcon Roldan <jose.alarcon.roldan@gmail.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-09-07 15:21:13 -07:00
Rob Jones
77be4daf4e Documentation: seq_file: Document seq_open_private(), seq_release_private()
Despite the fact that these functions have been around for years, they
are little used (only 15 uses in 13 files at the preseht time) even
though many other files use work-arounds to achieve the same result.

By documenting them, hopefully they will become more widely used.

Signed-off-by: Rob Jones <rob.jones@codethink.co.uk>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-09-07 15:21:13 -07:00
Linus Torvalds
6fef37c9a7 ACPI and power management fixes for 3.17-rc4
- Fix for recently broken test_suspend= command line argument
    (Rafael J Wysocki).
 
  - Fixes for regressions related to the ACPI video driver caused
    by switching the default to native backlight handling in 3.16
    from Hans de Goede.
 
  - Fix for a sysfs attribute of ACPI device objects that returns
    stale values sometimes due to the fact that they are cached
    instead of executing the appropriate method (_SUN) every time
    (broken in 3.14).  From Yasuaki Ishimatsu.
 
  - Fix for a deadlock between cpuidle_lock and cpu_hotplug.lock
    in the ACPI processor driver from Jiri Kosina.
 
  - Runtime output validation for the ACPI _DSD device configuration
    object missing from the support for it that has been introduced
    recently.  From Mika Westerberg.
 
  - Fix for an unuseful and misleading RAPL (Running Average Power
    Limit) domain detection message in the RAPL driver from Jacob Pan.
 
  - New Intel Haswell CPU ID for the RAPL driver from Jason Baron.
 
  - New Clevo W350etq blacklist entry for the ACPI EC driver
    from Lan Tianyu.
 
  - Cleanup for the intel_pstate driver and the core generic PM
    domains code from Gabriele Mazzotta and Geert Uytterhoeven.
 
 /
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Merge tag 'pm+acpi-3.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael Wysocki:
 "These are regression fixes (ACPI sysfs, ACPI video, suspend test),
  ACPI cpuidle deadlock fix, missing runtime validation of ACPI _DSD
  output, a fix and a new CPU ID for the RAPL driver, new blacklist
  entry for the ACPI EC driver and a couple of trivial cleanups
  (intel_pstate and generic PM domains).

  Specifics:

   - Fix for recently broken test_suspend= command line argument (Rafael
     Wysocki).

   - Fixes for regressions related to the ACPI video driver caused by
     switching the default to native backlight handling in 3.16 from
     Hans de Goede.

   - Fix for a sysfs attribute of ACPI device objects that returns stale
     values sometimes due to the fact that they are cached instead of
     executing the appropriate method (_SUN) every time (broken in
     3.14).  From Yasuaki Ishimatsu.

   - Fix for a deadlock between cpuidle_lock and cpu_hotplug.lock in the
     ACPI processor driver from Jiri Kosina.

   - Runtime output validation for the ACPI _DSD device configuration
     object missing from the support for it that has been introduced
     recently.  From Mika Westerberg.

   - Fix for an unuseful and misleading RAPL (Running Average Power
     Limit) domain detection message in the RAPL driver from Jacob Pan.

   - New Intel Haswell CPU ID for the RAPL driver from Jason Baron.

   - New Clevo W350etq blacklist entry for the ACPI EC driver from Lan
     Tianyu.

   - Cleanup for the intel_pstate driver and the core generic PM domains
     code from Gabriele Mazzotta and Geert Uytterhoeven"

* tag 'pm+acpi-3.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / cpuidle: fix deadlock between cpuidle_lock and cpu_hotplug.lock
  ACPI / scan: not cache _SUN value in struct acpi_device_pnp
  cpufreq: intel_pstate: Remove unneeded variable
  powercap / RAPL: change domain detection message
  powercap / RAPL: add support for CPU model 0x3f
  PM / domains: Make generic_pm_domain.name const
  PM / sleep: Fix test_suspend= command line option
  ACPI / EC: Add msi quirk for Clevo W350etq
  ACPI / video: Disable native_backlight on HP ENVY 15 Notebook PC
  ACPI / video: Add a disable_native_backlight quirk
  ACPI / video: Fix use_native_backlight selection logic
  ACPICA: ACPI 5.1: Add support for runtime validation of _DSD package.
2014-09-07 11:57:27 -07:00
Linus Torvalds
9142eadefe Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull filesystem fixes from Al Viro:
 "Several bugfixes (all of them -stable fodder).

  Alexey's one deals with double mutex_lock() in UFS (apparently, nobody
  has tried to test "ufs: sb mutex merge + mutex_destroy" on something
  like file creation/removal on ufs).  Mine deal with two kinds of
  umount bugs, in umount propagation and in handling of automounted
  submounts, both resulting in bogus transient EBUSY from umount"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ufs: fix deadlocks introduced by sb mutex merge
  fix EBUSY on umount() from MNT_SHRINKABLE
  get rid of propagate_umount() mistakenly treating slaves as busy.
2014-09-07 10:59:58 -07:00
Linus Torvalds
81368f8bb8 Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull RCU fix from Ingo Molnar:
 "A boot hang fix for the offloaded callback RCU model (RCU_NOCB_CPU=y
  && (TREE_CPU=y || TREE_PREEMPT_RC)) in certain bootup scenarios"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  rcu: Make nocb leader kthreads process pending callbacks after spawning
2014-09-07 10:51:42 -07:00
Linus Torvalds
ebc54f278f Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
 "Three fixlets from the timer departement:

   - Update the timekeeper before updating vsyscall and pvclock.  This
     fixes the kvm-clock regression reported by Chris and Paolo.

   - Use the proper irq work interface from NMI.  This fixes the
     regression reported by Catalin and Dave.

   - Clarify the compat_nanosleep error handling mechanism to avoid
     future confusion"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timekeeping: Update timekeeper before updating vsyscall and pvclock
  compat: nanosleep: Clarify error handling
  nohz: Restore NMI safe local irq work for local nohz kick
2014-09-07 10:37:48 -07:00
Alexey Khoroshilov
9ef7db7f38 ufs: fix deadlocks introduced by sb mutex merge
Commit 0244756edc ("ufs: sb mutex merge + mutex_destroy") introduces
deadlocks in ufs_new_inode() and ufs_free_inode().
Most callers of that functions acqure the mutex by themselves and
ufs_{new,free}_inode() do that via lock_ufs(),
i.e we have an unavoidable double lock.

The patch proposes to resolve the issue by making sure that
ufs_{new,free}_inode() are not called with the mutex held.

Found by Linux Driver Verification project (linuxtesting.org).

Cc: stable@vger.kernel.org # 3.16
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-09-07 13:26:39 -04:00
Linus Torvalds
2b12164b55 A smattering of bug fixes across most architectures.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "A smattering of bug fixes across most architectures"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  powerpc/kvm/cma: Fix panic introduces by signed shift operation
  KVM: s390/mm: Fix guest storage key corruption in ptep_set_access_flags
  KVM: s390/mm: Fix storage key corruption during swapping
  arm/arm64: KVM: Complete WFI/WFE instructions
  ARM/ARM64: KVM: Nuke Hyp-mode tlbs before enabling MMU
  KVM: s390/mm: try a cow on read only pages for key ops
  KVM: s390: Fix user triggerable bug in dead code
2014-09-06 16:42:12 -07:00
Linus Torvalds
56c228546e ARM: SoC fixes for v3.17-rc4
Another round of fixes from arm-soc land, which are mostly DT fixes
 for:
 
 - OMAP: handful of DT fixes devices on newly supported hardware
 - davinci: fix 2nd EDMA channel
 - ux500: extend previous pinctrl fix to another board
 - at91: clock registration fixes, compatibility string precision
 
 And one more fix for event cleanup in drivers/bus/arm-ccn.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Kevin Hilman:
 "Another round of fixes from arm-soc land, which are mostly DT fixes
  for:

   - OMAP: handful of DT fixes devices on newly supported hardware
   - davinci: fix 2nd EDMA channel
   - ux500: extend previous pinctrl fix to another board
   - at91: clock registration fixes, compatibility string precision

  And one more fix for event cleanup in drivers/bus/arm-ccn"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  bus: arm-ccn: Move event cleanup routine
  ARM: at91/dt: rm9200: fix usb clock definition
  ARM: at91: rm9200: fix clock registration
  ARM: at91/dt: sam9g20: set at91sam9g20 pllb driver
  ARM: dts: dra7-evm: Add vtt regulator support
  ARM: dts: dra7-evm: Fix spi1 mux documentation
  ARM: dts: am43x-epos-evm: Disable QSPI to prevent conflict with GPMC-NAND
  ARM: OMAP2+: gpmc: Don't complain if wait pin is used without r/w monitoring
  ARM: dts: am43xx-epos-evm: Don't use read/write wait monitoring
  ARM: dts: am437x-gp-evm: Don't use read/write wait monitoring
  ARM: dts: am437x-gp-evm: Use BCH16 ECC scheme instead of BCH8
  ARM: dts: am43x-epos-evm: Use BCH16 ECC scheme instead of BCH8
  ARM: dts: am4372: fix USB regs size
  ARM: dts: am437x-gp: switch i2c0 to 100KHz
  ARM: dts: dra7-evm: Fix 8th NAND partition's name
  ARM: dts: dra7-evm: Fix i2c3 pinmux and frequency
  ARM: ux500: disable msp2 node on Snowball
  ARM: edma: Fix configuration parsing for SoCs with multiple eDMA3 CC
  ARM: dts: set 'ti,set-rate-parent' for dpll4_m5x2 clock
2014-09-06 12:37:43 -07:00
Linus Torvalds
11e9739813 xfs: fixes for v3.17-rc3
Fix:
 - a direct IO read/buffered read data corruption
 - the associated fallout from the DIO data corruption fix
 - collapse range bugs that are potential data corruption issues.
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Merge tag 'xfs-for-linus-3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs

Pull xfs fixes from Dave Chinner:
 "The fixes all address recently discovered data corruption issues.

  The original Direct IO issue was discovered by Chris Mason @ Facebook
  on a production workload which mixed buffered reads with direct reads
  and writes IO to the same file.  The fix for that exposed other issues
  with page invalidation (exposed by millions of fsx operations) failing
  due to dirty buffers beyond EOF.

  Finally, the collapse_range code could also cause problems due to
  racing writeback changing the extent map while it was being shifted
  around.  The commits for that problem are simple mitigation fixes that
  prevent the problem from occuring.  A more robust fix for 3.18 that
  addresses the underlying problem is currently being worked on by
  Brian.

  Summary of fixes:
   - a direct IO read/buffered read data corruption
   - the associated fallout from the DIO data corruption fix
   - collapse range bugs that are potential data corruption issues"

* tag 'xfs-for-linus-3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs:
  xfs: trim eofblocks before collapse range
  xfs: xfs_file_collapse_range is delalloc challenged
  xfs: don't log inode unless extent shift makes extent modifications
  xfs: use ranged writeback and invalidation for direct IO
  xfs: don't zero partial page cache pages during O_DIRECT writes
  xfs: don't zero partial page cache pages during O_DIRECT writes
  xfs: don't dirty buffers beyond EOF
2014-09-06 12:13:17 -07:00
Linus Torvalds
925e0ea47c Two trivial MTD updates for 3.17-rc4:
* A tiny comment tweak, to kill a bunch of DocBook warnings added during the
    merge window
 
  * A small fixup to the OTP routines' error handling
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Merge tag 'for-linus-20140905' of git://git.infradead.org/linux-mtd

Pull mtd fixes from Brian Norris:
 "Two trivial MTD updates for 3.17-rc4:

   - a tiny comment tweak, to kill a bunch of DocBook warnings added
     during the merge window

   - a small fixup to the OTP routines' error handling"

* tag 'for-linus-20140905' of git://git.infradead.org/linux-mtd:
  mtd: nand: fix DocBook warnings on nand_sdr_timings doc
  mtd: cfi_cmdset_0002: check return code for get_chip()
2014-09-06 12:12:09 -07:00
Thomas Gleixner
9bf2419fa7 timekeeping: Update timekeeper before updating vsyscall and pvclock
The update_walltime() code works on the shadow timekeeper to make the
seqcount protected region as short as possible. But that update to the
shadow timekeeper does not update all timekeeper fields because it's
sufficient to do that once before it becomes life. One of these fields
is tkr.base_mono. That stays stale in the shadow timekeeper unless an
operation happens which copies the real timekeeper to the shadow.

The update function is called after the update calls to vsyscall and
pvclock. While not correct, it did not cause any problems because none
of the invoked update functions used base_mono.

commit cbcf2dd3b3 (x86: kvm: Make kvm_get_time_and_clockread()
nanoseconds based) changed that in the kvm pvclock update function, so
the stale mono_base value got used and caused kvm-clock to malfunction.

Put the update where it belongs and fix the issue.

Reported-by: Chris J Arges <chris.j.arges@canonical.com>
Reported-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1409050000570.3333@nanos
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-09-06 12:58:18 +02:00
Thomas Gleixner
849151dd54 compat: nanosleep: Clarify error handling
The error handling in compat_sys_nanosleep() is correct, but
completely non obvious. Document it and restrict it to the
-ERESTART_RESTARTBLOCK return value for clarity.

Reported-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-09-06 12:58:18 +02:00
Linus Torvalds
86ba8b0aee Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c bugfixes from Wolfram Sang:
 "I2C driver bugfixes for the 3.17 release.  Details can be found in the
  commit messages, yet I think this is typical driver stuff"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  Revert "i2c: rcar: remove spinlock"
  i2c: at91: add bound checking on SMBus block length bytes
  i2c: rk3x: fix bug that cause transfer fails in master receive mode
  i2c: at91: Fix a race condition during signal handling in at91_do_twi_xfer.
  i2c: mv64xxx: continue probe when clock-frequency is missing
  i2c: rcar: fix MNR interrupt handling
2014-09-05 13:45:09 -07:00
Kevin Hilman
389710837f First AT91 fixes batch for 3.17:
- compatibility string precision
 - clock registration and USB DT fix for at91rm9200
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Merge tag 'at91-fixes' of git://github.com/at91linux/linux-at91 into fixes

Merge "at91: fixes for 3.17 #1" from Nicols Ferre:

First AT91 fixes batch for 3.17:
- compatibility string precision
- clock registration and USB DT fix for at91rm9200

* tag 'at91-fixes' of git://github.com/at91linux/linux-at91:
  ARM: at91/dt: rm9200: fix usb clock definition
  ARM: at91: rm9200: fix clock registration
  ARM: at91/dt: sam9g20: set at91sam9g20 pllb driver

Signed-off-by: Kevin Hilman <khilman@linaro.org>
2014-09-05 13:29:17 -07:00
Pawel Moll
8fb2226435 bus: arm-ccn: Move event cleanup routine
The function cleaning up an initialized event
was called from the "event_del" handler, instead
of being used as the "destroy" callback. In case of
events group allocation this caused NULL pointer
dereference (as events are added and deleted
multiple times then). Fixed now.

Signed-off-by: Pawel Moll <mail@pawelmoll.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
2014-09-05 13:25:01 -07:00
Linus Torvalds
fb762340e5 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull m68k updates from Geert Uytterhoeven:
 "Wire up new syscalls getrandom and memfd_create"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k: Wire up memfd_create
  m68k: Wire up getrandom
2014-09-05 08:43:48 -07:00
Alexandre Belloni
ea4fc621ad ARM: at91/dt: rm9200: fix usb clock definition
The atmel,clk-divisors property is taking 4 divisors, if less are
provided, the clock registration will fail.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-09-05 17:36:12 +02:00
Alexandre Belloni
04ffc960d7 ARM: at91: rm9200: fix clock registration
Actually register clocks from device tree when using the common clock
framework.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
[nicolas.ferre@atmel.com: add at91 to function name]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-09-05 17:35:47 +02:00
Gaël PORTAY
650ca015fd ARM: at91/dt: sam9g20: set at91sam9g20 pllb driver
The at91sam9g20 SOC uses its own pllb implementation which is different
from the one inherited from at91sam9260 SOC.

Signed-off-by: Gaël PORTAY <gael.portay@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-09-05 17:19:35 +02:00
Johannes Weiner
ce00a96737 mm: memcontrol: revert use of root_mem_cgroup res_counter
Dave Hansen reports a massive scalability regression in an uncontained
page fault benchmark with more than 30 concurrent threads, which he
bisected down to 05b8430123 ("mm: memcontrol: use root_mem_cgroup
res_counter") and pin-pointed on res_counter spinlock contention.

That change relied on the per-cpu charge caches to mostly swallow the
res_counter costs, but it's apparent that the caches don't scale yet.

Revert memcg back to bypassing res_counters on the root level in order
to restore performance for uncontained workloads.

Reported-by: Dave Hansen <dave@sr71.net>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Tested-by: Dave Hansen <dave.hansen@intel.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Vladimir Davydov <vdavydov@parallels.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-09-05 08:19:02 -07:00
Anton Altaparmakov
10096fb108 Export sync_filesystem() for modular ->remount_fs() use
This patch changes sync_filesystem() to be EXPORT_SYMBOL().

The reason this is needed is that starting with 3.15 kernel, due to
Theodore Ts'o's commit 02b9984d64 ("fs: push sync_filesystem() down to
the file system's remount_fs()"), all file systems that have dirty data
to be written out need to call sync_filesystem() from their
->remount_fs() method when remounting read-only.

As this is now a generically required function rather than an internal
only function it should be EXPORT_SYMBOL() so that all file systems can
call it.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-09-05 08:16:21 -07:00
Linus Torvalds
8e6353bba3 regulator: Documentation fixes for v3.17
All the fixes people have found for the regulator API have been
 documentation fixes, avoiding warnings while building the kerneldoc,
 fixing some errors in one of the DT bindings documents and fixing some
 typos in the header.
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Merge tag 'regulator-v3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator documentation fixes from Mark Brown:
 "All the fixes people have found for the regulator API have been
  documentation fixes, avoiding warnings while building the kerneldoc,
  fixing some errors in one of the DT bindings documents and fixing some
  typos in the header"

* tag 'regulator-v3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: fix kernel-doc warnings in header files
  regulator: Proofread documentation
  regulator: tps65090: Fix tps65090 typos in example
2014-09-05 08:09:02 -07:00
Kevin Hilman
95f6e8142d Few fixes for omaps mostly for various devices to get them working
properly on the new am437x and dra7 hardware for several devices
 such as I2C, NAND, DDR3 and USB. There's also a clock fix for omap3.
 
 And also included are two minor cosmetic fixes that are not
 stictly fixes for the new hardware support added recently to
 downgrade a GPMC warning into a debug statement, and fix the
 confusing comments for dra7-evm spi1 mux.
 
 Note that these are all .dts changes except for a GPMC change.
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Merge tag 'omap-fixes-against-v3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

Merge "omap fixes against v3.17-rc3" from Tony Lindgren:

Few fixes for omaps mostly for various devices to get them working
properly on the new am437x and dra7 hardware for several devices
such as I2C, NAND, DDR3 and USB. There's also a clock fix for omap3.

And also included are two minor cosmetic fixes that are not
stictly fixes for the new hardware support added recently to
downgrade a GPMC warning into a debug statement, and fix the
confusing comments for dra7-evm spi1 mux.

Note that these are all .dts changes except for a GPMC change.

* tag 'omap-fixes-against-v3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (255 commits)
  ARM: dts: dra7-evm: Add vtt regulator support
  ARM: dts: dra7-evm: Fix spi1 mux documentation
  ARM: dts: am43x-epos-evm: Disable QSPI to prevent conflict with GPMC-NAND
  ARM: OMAP2+: gpmc: Don't complain if wait pin is used without r/w monitoring
  ARM: dts: am43xx-epos-evm: Don't use read/write wait monitoring
  ARM: dts: am437x-gp-evm: Don't use read/write wait monitoring
  ARM: dts: am437x-gp-evm: Use BCH16 ECC scheme instead of BCH8
  ARM: dts: am43x-epos-evm: Use BCH16 ECC scheme instead of BCH8
  ARM: dts: am4372: fix USB regs size
  ARM: dts: am437x-gp: switch i2c0 to 100KHz
  ARM: dts: dra7-evm: Fix 8th NAND partition's name
  ARM: dts: dra7-evm: Fix i2c3 pinmux and frequency
  Linux 3.17-rc3
  ...

Signed-off-by: Kevin Hilman <khilman@linaro.org>
2014-09-05 08:05:56 -07:00