Previously barriers were only supported on RAID1.  This is because
other levels requires synchronisation across all devices and so needed
a different approach.
Here is that approach.

When a barrier arrives, we send a zero-length barrier to every active
device.  When that completes - and if the original request was not
empty -  we submit the barrier request itself (with the barrier flag
cleared) and then submit a fresh load of zero length barriers.

The barrier request itself is asynchronous, but any subsequent
request will block until the barrier completes.

The reason for clearing the barrier flag is that a barrier request is
allowed to fail.  If we pass a non-empty barrier through a striping
raid level it is conceivable that part of it could succeed and part
could fail.  That would be way too hard to deal with.
So if the first run of zero length barriers succeed, we assume all is
sufficiently well that we send the request and ignore errors in the
second run of barriers.

RAID5 needs extra care as write requests may not have been submitted
to the underlying devices yet.  So we flush the stripe cache before
proceeding with the barrier.

Note that the second set of zero-length barriers are submitted
immediately after the original request is submitted.  Thus when
a personality finds mddev->barrier to be set during make_request,
it should not return from make_request until the corresponding
per-device request(s) have been queued.

That will be done in later patches.
Signed-off-by: NNeilBrown <neilb@suse.de>
Reviewed-by: NAndre Noll <maan@systemlinux.org>

If a resync/recovery/check/repair is interrupted for some reason, it
can be useful to know exactly where it got up to.
So in that case, do not clear curr_resync_completed.
Initialise it when starting a resync/recovery/... instead.
Signed-off-by: NNeilBrown <neilb@suse.de>

When a 'check' or 'repair' finished we should clear resync_min
so that a future check/repair will cover the whole array (by default).
However if it is interrupted, we should update resync_min to
where we got up to, so that when the check/repair continues it
just does the remainder of the array.
Signed-off-by: NNeilBrown <neilb@suse.de>

Signed-off-by: NNeilBrown <neilb@suse.de>

qd_idx is previously declared and given exactly the same value!
Signed-off-by: NNeilBrown <neilb@suse.de>

A write intent bitmap can be removed from an array while the
array is active.
When this happens, all IO is suspended and flushed before the
bitmap is removed.
However it is possible that bitmap_daemon_work is still running to
clear old bits from the bitmap.  If it is, it can dereference the
bitmap after it has been freed.

So introduce a new mutex to protect bitmap_daemon_work and get it
before destroying a bitmap.

This is suitable for any current -stable kernel.
Signed-off-by: NNeilBrown <neilb@suse.de>
Cc: stable@kernel.org

* 'ixp4xx' of git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6:
  IXP4xx: GTWX5715 platform only has two PCI IRQ lines, not four.
  IXP4xx: Introduce IXP4XX_GPIO_IRQ(n) macro and convert IXP4xx platform files.
  IXP4xx: move Gemtek GTWX5715 platform macros to the platform code.
  IXP4xx: Remove unused Motorola PrPMC1100 platform macros.
  IXP4xx: move FSG platform macros to the platform code.
  IXP4xx: move DSM G600 platform macros to the platform code.
  IXP4xx: move NAS100D platform macros to the platform code.
  IXP4xx: move NSLU2 platform macros to the platform code.
  IXP4xx: move Coyote platform macros to the platform code.
  IXP4xx: move AVILA platform macros to the platform code.
  IXP4xx: move IXDP425 platform macros to the platform code.
  IXP4xx: Extend PCI MMIO indirect address space to 1 GB.
  IXP4xx: Fix compilation failure with CONFIG_IXP4XX_INDIRECT_PCI.
  IXP4xx: Drop "__ixp4xx_" prefix from in/out/ioread/iowrite functions for clarity.
  IXP4xx: Rename indirect MMIO primitives from __ixp4xx_* to __indirect_*.
  IXP4xx: Ensure index is positive in irq_to_gpio() and npe_request().
  ARM: fix insl() and outsl() endianness on IXP4xx architecture.
  IXP4xx: Fix normally-disabled debugging text in drivers/net/arm/ixp4xx_eth.c.
  IXP4xx: change the timer base frequency to 66.666000 MHz.

As shown by the previous patch (6698e347: "tty: Fix BKL taken under a
spinlock bug introduced in the BKL split") the BKL removal is prone to
some subtle issues, where removing the BKL in one place may in fact make
a previously nested BKL call the new outer call, and then prone to nasty
deadlocks with other spinlocks.

In general, we should never take the BKL while we're holding a spinlock,
so let's just add a "might_sleep()" to it (even though the BKL doesn't
technically sleep - at least not yet), and we'll get nice warnings the
next time this kind of problem happens during BKL removal.
Acked-and-Tested-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The fasync path takes the BKL (it probably doesn't need to in fact)
while holding the file_list spinlock.  You can't do that with the kernel
lock: it causes lock inversions and deadlocks.

Leave the BKL over that bit for the moment.

Identified by AKPM.
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Acked-and-Tested-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (151 commits)
  powerpc: Fix usage of 64-bit instruction in 32-bit altivec code
  MAINTAINERS: Add PowerPC patterns
  powerpc/pseries: Track previous CPPR values to correctly EOI interrupts
  powerpc/pseries: Correct pseries/dlpar.c build break without CONFIG_SMP
  powerpc: Make "intspec" pointers in irq_host->xlate() const
  powerpc/8xx: DTLB Miss cleanup
  powerpc/8xx: Remove DIRTY pte handling in DTLB Error.
  powerpc/8xx: Start using dcbX instructions in various copy routines
  powerpc/8xx: Restore _PAGE_WRITETHRU
  powerpc/8xx: Add missing Guarded setting in DTLB Error.
  powerpc/8xx: Fixup DAR from buggy dcbX instructions.
  powerpc/8xx: Tag DAR with 0x00f0 to catch buggy instructions.
  powerpc/8xx: Update TLB asm so it behaves as linux mm expects.
  powerpc/8xx: Invalidate non present TLBs
  powerpc/pseries: Serialize cpu hotplug operations during deactivate Vs deallocate
  pseries/pseries: Add code to online/offline CPUs of a DLPAR node
  powerpc: stop_this_cpu: remove the cpu from the online map.
  powerpc/pseries: Add kernel based CPU DLPAR handling
  sysfs/cpu: Add probe/release files
  powerpc/pseries: Kernel DLPAR Infrastructure
  ...

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: hda - Overwrite pin config on intel DG45ID board.
  intelhdmi - dont power off HDA link
  ALSA: hrtimer - Fix lock-up
  ALSA: intelhdmi - add channel mapping for typical configurations
  ALSA: intelhdmi - channel mapping applies to Pin
  ALSA: intelhdmi - accept DisplayPort pin
  ALSA: hda - show HBR(High Bit Rate) pin cap in procfs
  ALSA: hda - Fix LED GPIO setup for HP laptops with IDT codecs
  ASoC: Fix build of OMAP sound drivers
  ALSA: opti93x: fix irq releasing if the irq cannot be allocated

Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6

* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (75 commits)
  omap3: Fix OMAP35XX_REV macros
  omap: serial: fix non-empty uart fifo read abort
  omap3: Zoom2/3: Update hsmmc board config params
  omap3 : Enable TWL4030 Keypad for Zoom2 and Zoom3 boards
  omap3: id code detection 3525 vs 3515
  omap3: rx51: Use wl1251 in SPI mode 3
  omap3: zoom2/3: make MMC slot work again
  omap1: htcherald: Update defconfig to include mux support
  omap1: LCD_DMA: Use some define rather than a hexadecimal
  omap: header: remove unused data-type
  omap: arch/arm/plat-omap/devices.c - sort alphabetically
  omap: Correcting GPMC_CONFIG1_DEVICETYPE_NAND
  OMAP3: serial - allow platforms specify which UARTs to initialize
  omap3: cm-t35: add mux initialization
  OMAP4: Sync up omap4430 defconfig
  OMAP4: Remove the secondary wait loop
  OMAP4: AuxCoreBoot registers only accessible in secure mode
  OMAP4: Fix SRAM base and size
  OMAP4: Fix cpu detection
  omap3: pandora: board file updates for .33
  ...

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  be2net: fix error in rx completion processing.
  igbvf: avoid reset storms due to mailbox issues
  igb: fix handling of mailbox collisions between PF/VF
  usb: remove rare pm primitive for conversion to new API

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
  slab, kmemleak: pass the correct pointer to kmemleak_erase()
  slab, kmemleak: stop calling kmemleak_erase() unconditionally
  SLAB: Fix unlikely() annotation in __cache_alloc_node()
  SLAB: Fix lockdep annotations for CPU hotplug
  SLUB: Fix __GFP_ZERO unlikely() annotation
  slub: allow stats to be cleared

Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (21 commits)
  sched: Remove forced2_migrations stats
  sched: Fix memory leak in two error corner cases
  sched: Fix build warning in get_update_sysctl_factor()
  sched: Update normalized values on user updates via proc
  sched: Make tunable scaling style configurable
  sched: Fix missing sched tunable recalculation on cpu add/remove
  sched: Fix task priority bug
  sched: cgroup: Implement different treatment for idle shares
  sched: Remove unnecessary RCU exclusion
  sched: Discard some old bits
  sched: Clean up check_preempt_wakeup()
  sched: Move update_curr() in check_preempt_wakeup() to avoid redundant call
  sched: Sanitize fork() handling
  sched: Clean up ttwu() rq locking
  sched: Remove rq->clock coupling from set_task_cpu()
  sched: Consolidate select_task_rq() callers
  sched: Remove sysctl.sched_features
  sched: Protect sched_rr_get_param() access to task->sched_class
  sched: Protect task->cpus_allowed access in sched_getaffinity()
  sched: Fix balance vs hotplug race
  ...

Fixed up conflicts in kernel/sysctl.c (due to sysctl cleanup)

The pin config provided by BIOS have some problems:
0x0221401f: [Jack] HP Out at Ext Front  <-- other association and sequence
0x02a19020: [Jack] Mic at Ext Front     <-- other association
0x01113014: [Jack] Speaker at Ext Rear  <-- line out (not speaker)
0x01114010: [Jack] Speaker at Ext Rear  <-- line out
0x01a19030: [Jack] Mic at Ext Rear      <-- other association
0x01111012: [Jack] Speaker at Ext Rear  <-- line out
0x01116011: [Jack] Speaker at Ext Rear  <-- line out
0x40f000f0: [N/A] Other at Ext N/A
0x40f000f0: [N/A] Other at Ext N/A
0x40f000f0: [N/A] Other at Ext N/A
0x40f000f0: [N/A] Other at Ext N/A
0x40f000f0: [N/A] Other at Ext N/A
0x01451140: [Jack] SPDIF Out at Ext Rear
0x40f000f0: [N/A] Other at Ext N/A

just overwrite it.
Signed-off-by: NAlexey Fisher <bug-track@fisher-privat.net>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

There are certain skews of the NIC which have multiple bits set in
adapter->cap.  Use & instead of == to process rx completions.
Signed-off-by: NAjit Khaparde <ajitk@serverengines.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

From: Alexander Duyck <alexander.h.duyck@intel.com>

This change makes it so that reset/interrupt storms can be avoided when
there are mailbox issues.  The new behavior is to only allow the device to
trigger mailbox related resets only once every 10 seconds.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch changes the handling of collisions between the use of the
PF/VF sides of the mailbox.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch removes a rare use of the USB power management API which
won't be supported after the conversion to the new generic runtime power
management framework. Functionality is not altered.
Signed-off-by: NOliver Neukum <oliver@neukum.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (75 commits)
  net: Handle NETREG_UNINITIALIZED devices correctly
  can: add the driver for Analog Devices Blackfin on-chip CAN controllers
  xfrm: Fix truncation length of authentication algorithms installed via PF_KEY
  net: use compat helper functions in compat_sys_recvmmsg
  net: fix compat_sys_recvmmsg parameter type
  cxgb3: Fixing EEH handlers
  cnic: Zero out status block and Event Queue indices.
  cnic: Send delete command when shutting down iSCSI ring.
  net: smc91x: Fix up type mismatch in smc_drv_resume().
  smc91x: fix unused flags warnings on UP systems
  MAINTAINERS: Transfering maintainership of cdc-ether
  net: Add missing TST_CFG_WRITE bits around sky2_pci_write
  net: Fix Yukon-2 Optima TCP offload setup
  net: niu uses crc32, so select CRC32
  wireless: update old static regulatory domain rules
  mac80211: Revert 'Use correct sign for mesh active path refresh'
  mac80211: Fixed bug in mesh portal paths
  net/mac80211: Correct size given to memset
  b43: Remove reset after fatal DMA error
  rtl8187: add radio led and fix warnings on suspend
  ...

* 'compat-ioctl-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground:
  usbdevfs: move compat_ioctl handling to devio.c
  lp: move compat_ioctl handling into lp.c
  compat_ioctl: pass compat pointer directly to handlers
  compat_ioctl: simplify lookup table
  compat_ioctl: simplify calling of handlers
  compat_ioctl: inline all conversion handlers
  compat_ioctl: Remove BKL
  compat_ioctl: remove all VT ioctl handling

* git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  asm-generic: add sys_recvmmsg to unistd.h
  asm-generic: add sys_accept4 to unistd.h
  asm-generic/gpio.h: add some forward decls of the device struct
  asm-generic: Fix typo in asm-generic/unistd.h.
  lib/checksum: fix one more thinko
  lib/checksum.c: make do_csum optional
  lib/checksum.c: use 32-bit arithmetic consistently

Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  itimer: Fix the itimer trace print format
  hrtimer: move timer stats helper functions to hrtimer.c
  hrtimer: Tune hrtimer_interrupt hang logic

Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  lockdep: Avoid out of bounds array reference in save_trace()
  futex: Take mmap_sem for get_user_pages in fault_in_user_writeable
  lockstat: Add usage info to Documentation/lockstat.txt
  lockstat: Fix min, max times in /proc/lock_stats

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86/amd-iommu: Fix PCI hotplug with passthrough mode
  x86/amd-iommu: Fix passthrough mode
  x86: mmio-mod.c: Use pr_fmt
  x86: kmmio.c: Add and use pr_fmt(fmt)
  x86: i8254.c: Add pr_fmt(fmt)
  x86: setup_percpu.c: Use pr_<level> and add pr_fmt(fmt)
  x86: es7000_32.c: Use pr_<level> and add pr_fmt(fmt)
  x86: Print DMI_BOARD_NAME as well as DMI_PRODUCT_NAME from __show_regs()
  x86: Factor duplicated code out of __show_regs() into show_regs_common()
  arch/x86/kernel/microcode*: Use pr_fmt() and remove duplicated KERN_ERR prefix
  x86, mce: fix confusion between bank attributes and mce attributes
  x86/mce: Set up timer unconditionally
  x86: Fix bogus warning in apic_noop.apic_write()
  x86: Fix typo in arch/x86/mm/kmmio.c
  x86: ASUS P4S800 reboot=bios quirk

Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing: Remove comparing of NULL to va_list in trace_array_vprintk()
  tracing: Fix function graph trace_pipe to properly display failed entries
  tracing: Add full state to trace_seq
  tracing: Buffer the output of seq_file in case of filled buffer
  tracing: Only call pipe_close if pipe_close is defined
  tracing: Add pipe_close interface

Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (57 commits)
  x86, perf events: Check if we have APIC enabled
  perf_event: Fix variable initialization in other codepaths
  perf kmem: Fix unused argument build warning
  perf symbols: perf_header__read_build_ids() offset'n'size should be u64
  perf symbols: dsos__read_build_ids() should read both user and kernel buildids
  perf tools: Align long options which have no short forms
  perf kmem: Show usage if no option is specified
  sched: Mark sched_clock() as notrace
  perf sched: Add max delay time snapshot
  perf tools: Correct size given to memset
  perf_event: Fix perf_swevent_hrtimer() variable initialization
  perf sched: Fix for getting task's execution time
  tracing/kprobes: Fix field creation's bad error handling
  perf_event: Cleanup for cpu_clock_perf_event_update()
  perf_event: Allocate children's perf_event_ctxp at the right time
  perf_event: Clean up __perf_event_init_context()
  hw-breakpoints: Modify breakpoints without unregistering them
  perf probe: Update perf-probe document
  perf probe: Support --del option
  trace-kprobe: Support delete probe syntax
  ...

* 'for-linus' of git://codeaurora.org/quic/kernel/dwalker/linux-msm:
  HTC Dream: mmc compilation fixes
  video: Allow selecting MSM framebuffer in Kconfig
  Add arm msm maintainer entry
  msm: Add memory map for HTC Dream
  msm: add minimal board file for HTC Dream device
  msm: make debugging UART (for DEBUG_LL) configurable

Conflicts:
	include/net/tcp.h

In original implementation, the revision passed to
these macros contained revision number in lower nibble.

But, later the revision bits (OMAP_REVBITS_XX) were
defined to use omap_revision[15:08] where revision
number is containied in higher nibble.

This patch updates the macros; else incorrect revision
is detected for OMAP35xx devices.
Signed-off-by: NSanjeev Premi <premi@ti.com>

OMAP3xxx and OMAP4430 UART IP blocks have a restriction wrt RX FIFO.
Empty RX fifo read causes an abort.

OMAP3xxx:
	UART IP revision >= 0x52 have this issue
	MVR register format is:
	Bits  Field Name  Description  				Type  Reset
	31:8   RESERVED 					RO  	0x0
	7:4    MAJOR  	Major revision number of the module.  	RO  	0x--
	3:0    MINOR  	Minor revision number of the module.  	RO  	0x--

OMAP4xxx:
	All revisions have this issue
	Revision id check is not used as the format of MVR resigster has changed
	For omap4 MVR register reads as: 0x50410602 => Revision id = 0x0602
	Format of MVR register on omap4 is: (Courtesy: Cousson, Benoit)
	Bits  Field Name  Description  				Type  Reset
	31:30 SCHEME  	Scheme revision number of module  	RO  	0x1
	29:28 RESERVED   					RO  	0x1
	27:16 FUNC  	Function revision number of module  	RO  	0x041
	15:11 RTL  		Rtl revision number of module  	RO  	0x00
	10:8  MAJOR 	Major revision number of the module.  	RO  	0x6
	7:6   CUSTOM  	Custom revision number of the module.  	RO  	0x0
	5:0   MINOR  	Minor revision number of the module.  	RO  	0x02

Override the default 8250 read handler: mem_serial_in()
by a custom handler: serial_in_8250()
which makes sure that RX fifo is not read when empty

tested on zoom3(3630) board

Cc: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: NVikram Pandita <vikram.pandita@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Update the hsmmc zoom peripheral configuration to support:
Power saving mode
mmc2 8-bit support
Configure mmc2 as non removable
Signed-off-by: NMadhusudhan Chikkature <madhu.cr@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

The TWL4030 keypad driver is not enabled by default for zoom2 and zoom3
boards.

This patch will enable the same for both zoom2 and zoom3 boards.

Tested on zoom2(3430) and zoom3(3630) boards.
Signed-off-by: NManjunatha GK <manjugk@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

The runtime detection of OMAP3515 and OMAP3525
was reversed.
Signed-off-by: NSergey Lapin <slapin@ossfans.org>
Signed-off-by: NSanjeev Premi <premi@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Otherwise Extreme Lower Power (ELP) wakeup doesn't work properly.
Signed-off-by: NKalle Valo <kalle.valo@nokia.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>