* 'nfs-for-2.6.39' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (54 commits)
RPC: killing RPC tasks races fixed
xprt: remove redundant check
SUNRPC: Convert struct rpc_xprt to use atomic_t counters
SUNRPC: Ensure we always run the tk_callback before tk_action
sunrpc: fix printk format warning
xprt: remove redundant null check
nfs: BKL is no longer needed, so remove the include
NFS: Fix a warning in fs/nfs/idmap.c
Cleanup: Factor out some cut-and-paste code.
cleanup: save 60 lines/100 bytes by combining two mostly duplicate functions.
NFS: account direct-io into task io accounting
gss:krb5 only include enctype numbers in gm_upcall_enctypes
RPCRDMA: Fix FRMR registration/invalidate handling.
RPCRDMA: Fix to XDR page base interpretation in marshalling logic.
NFSv4: Send unmapped uid/gids to the server when using auth_sys
NFSv4: Propagate the error NFS4ERR_BADOWNER to nfs4_do_setattr
NFSv4: cleanup idmapper functions to take an nfs_server argument
NFSv4: Send unmapped uid/gids to the server if the idmapper fails
NFSv4: If the server sends us a numeric uid/gid then accept it
NFSv4.1: reject zero layout with zeroed stripe unit
...
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: (38 commits)
amd64_edac: Fix decode_syndrome types
amd64_edac: Fix DCT argument type
amd64_edac: Fix ranges signedness
amd64_edac: Drop local variable
amd64_edac: Fix PCI config addressing types
amd64_edac: Fix DRAM base macros
amd64_edac: Fix node id signedness
amd64_edac: Drop redundant declarations
amd64_edac: Enable driver on F15h
amd64_edac: Adjust ECC symbol size to F15h
amd64_edac: Simplify scrubrate setting
PCI: Rename CPU PCI id define
amd64_edac: Improve DRAM address mapping
amd64_edac: Sanitize ->read_dram_ctl_register
amd64_edac: Adjust sys_addr to chip select conversion routine to F15h
amd64_edac: Beef up early exit reporting
amd64_edac: Revamp online spare handling
amd64_edac: Fix channel interleave removal
amd64_edac: Correct node interleaving removal
amd64_edac: Add support for interleaved region swapping
...
Fix up trivial conflict in include/linux/pci_ids.h due to
AMD_15H_NB_MISC being renamed as AMD_15H_NB_F3 next to the new
AMD_15H_NB_LINK entry.
* 'for-linus/2639/i2c-1' of git://git.fluff.org/bjdooks/linux:
i2c-mpc: Add support for 64bit system
i2c: add driver for Freescale i.MX28
i2c: tegra: Add i2c support
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
watchdog: booke_wdt: clean up status messages
watchdog: cleanup spaces before tabs
watchdog: convert to DEFINE_PCI_DEVICE_TABLE
watchdog: Xen watchdog driver
watchdog: Intel SCU Watchdog Timer Driver for Moorestown and Medfield platforms.
watchdog: jz4740_wdt - fix magic character checking
watchdog: add JZ4740 watchdog driver
watchdog: it87_wdt: Add support for IT8721F watchdog
watchdog: hpwdt: build hpwdt as module by default with NMI_DECODING enabled
watchdog: hpwdt: Fix a couple of typos
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/staging: (44 commits)
hwmon: (lineage-pem): Fix in1 voltage alarm sysfs attributes
hwmon/f71882fg: Add support for f71808e
hwmon/f71882fg: Add support for f71869f and f71869e
hwmon/f71882fg: Add support for f71889ed
hwmon/f71882fg: Break out test for auto pwm's controlled by digital readings
hwmon/f71882fg: Separate temp beep sysfs attr from the other temp sysfs attr
hwmon/f71882fg: Remove bogus temp2_type for certain models
hwmon/f71882fg: Make number of temps configurable
hwmon/f71882fg: Make creation of in sysfs attributes more generic
hwmon/f71882fg: Only allow negative auto point temps if fan_neg_temp is enabled
hwmon/f71882fg: Fix temp1 sensor type reporting
hwmon: (w83627ehf) Display correct temperature sensor labels for systems with NCT6775F
hwmon: (w83627ehf) Add fan debounce support for NCT6775F and NCT6776F
hwmon: (w83627ehf) Update Kconfig for W83677HG-B, NCT6775F and NCT6776F
hwmon: (w83627ehf) Store rpm instead of raw fan speed data
hwmon: (w83627ehf) Use 16 bit fan count registers if supported
hwmon: (w83627ehf) Add support for Nuvoton NCT6775F and NCT6776F
hwmon: (w83627ehf) Permit enabling SmartFan IV mode if configured at startup
hwmon: (w83627ehf) Convert register arrays to 16 bit, and convert access to pointers
hwmon: (w83627ehf) Remove references to datasheets which no longer exist
...
Use the newly added smp_call_func_t in smp_call_function_interrupt for
the func variable, and make the comment above the WARN more assertive
and explicit. Also, func is a function pointer and does not need an
offset, so use %pf not %pS.
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mike Galbraith reported finding a lockup ("perma-spin bug") where the
cpumask passed to smp_call_function_many was cleared by other cpu(s)
while a cpu was preparing its call_data block, resulting in no cpu to
clear the last ref and unlock the block.
Having cpus clear their bit asynchronously could be useful on a mask of
cpus that might have a translation context, or cpus that need a push to
complete an rcu window.
Instead of adding a BUG_ON and requiring yet another cpumask copy, just
detect the race and handle it.
Note: arch_send_call_function_ipi_mask must still handle an empty
cpumask because the data block is globally visible before the that arch
callback is made. And (obviously) there are no guarantees to which cpus
are notified if the mask is changed during the call; only cpus that were
online and had their mask bit set during the whole call are guaranteed
to be called.
Reported-by: Mike Galbraith <efault@gmx.de>
Reported-by: Jan Beulich <JBeulich@novell.com>
Acked-by: Jan Beulich <jbeulich@novell.com>
Cc: stable@kernel.org
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Paul McKenney's review pointed out two problems with the barriers in the
2.6.38 update to the smp call function many code.
First, a barrier that would force the func and info members of data to
be visible before their consumption in the interrupt handler was
missing. This can be solved by adding a smp_wmb between setting the
func and info members and setting setting the cpumask; this will pair
with the existing and required smp_rmb ordering the cpumask read before
the read of refs. This placement avoids the need a second smp_rmb in
the interrupt handler which would be executed on each of the N cpus
executing the call request. (I was thinking this barrier was present
but was not).
Second, the previous write to refs (establishing the zero that we the
interrupt handler was testing from all cpus) was performed by a third
party cpu. This would invoke transitivity which, as a recient or
concurrent addition to memory-barriers.txt now explicitly states, would
require a full smp_mb().
However, we know the cpumask will only be set by one cpu (the data
owner) and any preivous iteration of the mask would have cleared by the
reading cpu. By redundantly writing refs to 0 on the owning cpu before
the smp_wmb, the write to refs will follow the same path as the writes
that set the cpumask, which in turn allows us to keep the barrier in the
interrupt handler a smp_rmb instead of promoting it to a smp_mb (which
will be be executed by N cpus for each of the possible M elements on the
list).
I moved and expanded the comment about our (ab)use of the rcu list
primitives for the concurrent walk earlier into this function. I
considered moving the first two paragraphs to the queue list head and
lock, but felt it would have been too disconected from the code.
Cc: Paul McKinney <paulmck@linux.vnet.ibm.com>
Cc: stable@kernel.org (2.6.32 and later)
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Peter pointed out there was nothing preventing the list_del_rcu in
smp_call_function_interrupt from running before the list_add_rcu in
smp_call_function_many.
Fix this by not setting refs until we have gotten the lock for the list.
Take advantage of the wmb in list_add_rcu to save an explicit additional
one.
I tried to force this race with a udelay before the lock & list_add and
by mixing all 64 online cpus with just 3 random cpus in the mask, but
was unsuccessful. Still, inspection shows a valid race, and the fix is
a extension of the existing protection window in the current code.
Cc: stable@kernel.org (v2.6.32 and later)
Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change the _mapcount value indicating PageBuddy from -2 to -128 for
more robusteness against page_mapcount() undeflows.
Use reset_page_mapcount instead of __ClearPageBuddy in bad_page to
ignore the previous retval of PageBuddy().
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reported-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/epip/linux-2.6-unicore32: (40 commits)
unicore32: rewrite arch-specific tlb.h to use asm-generic version
unicore32: modify io_p2v and io_v2p macros, and adjust PKUNITY_mmio_BASEs
unicore32: replace unicore32-specific iomap functions with generic lib implementation
unicore32 machine related: add frame buffer driver for pkunity-v3 soc
unicore32 machine related files: add i2c bus drivers for pkunity-v3 soc
unicore32 io: redefine __REG(x) and re-use readl/writel funcs
unicore32 i8042 upgrade and bugfix: adjust resource request region type
unicore32 upgrade to v2.6.38-rc5: add one more paramter for pte_alloc_map call
unicore32 i8042: adjust io funcs of i8042-unicore32io.h
unicore32: rename PKUNITY_IOSPACE_BASE to PKUNITY_MMIO_BASE
unicore32: modify function names and parameters for irq_chips
unicore32: remove unused lines in arch/unicore32/include/asm/irq.h
unicore32 time.c: change calculate method for clock_event_device
unicore32: ADD MAINTAINER for unicore32 architecture
unicore32 machine related files: ps2 driver
unicore32 machine related files: pci bus handling
unicore32 machine related files: hardware registers
unicore32 machine related files: core files
unicore32 additional architecture files: boot process
unicore32 additional architecture files: low-level lib: misc
...
Acked-by: Arnd Bergmann <arnd@arndb.de>
* 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (34 commits)
sh: Convert to generic show_interrupts.
sh: Wire up new fhandle and clock_adjtime syscalls.
sh: modify platform_device for sh_eth driver
sh: add GETHER's platform_device in board-sh7757lcr
sh: update sh7757lcr_defconfig
sh: add platform_device of tmio_mmc and sh_mmcif to sh7757lcr
sh: dmaengine support for SH7757
sh: add mmc clock in clock-sh7757
sh: add spi_board_info in sh7757lcr
sh: add platform_device for SPI
sh: add USB_ARCH_HAS_EHCI and OHCI for SH7757
sh: Rename cpuidle states to fit general conventions
serial: sh-sci: fix deadlock when resuming from S3 sleep
sh: Enable CONFIG_GCOV_PROFILE_ALL for sh
sh: Fix up async PCIe probing on SMP.
serial: sh-sci: Kill off the special earlyprintk device.
serial: sh-sci: Use dev_name() for region reservations.
serial: sh-sci: Fix up earlyprintk port mapping.
serial: sh-sci: Limit early console to one device.
serial: sh-sci: Fix up break timer scheduling race.
...
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6:
fbdev: sh_mobile_lcdc: Add YUV framebuffer support
viafb: split pll configs up
viafb: remove duplicated clock storage
viafb: always return the best possible clock
viafb: remove duplicated clock information
fbdev: sh_mobile_lcdcfb: add backlight support
viafb: factor lcd scaling parameters out
viafb: strip some structures
viafb: remove unused data_mode and device_type
viafb: kill lcd_panel_id
video via: make local variables static
video via: fix iomem access
video/via: drop deprecated (and unused) i2c_adapter.id
RPC task RPC_TASK_QUEUED bit is set must be checked before trying to wake up
task rpc_killall_tasks() because task->tk_waitqueue can not be set (equal to
NULL).
Also, as Trond Myklebust mentioned, such approach (instead of checking
tk_waitqueue to NULL) allows us to "optimise away the call to
rpc_wake_up_queued_task() altogether for those
tasks that aren't queued".
Here is an example of dereferencing of tk_waitqueue equal to NULL:
CPU 0 CPU 1 CPU 2
-------------------- --------------------- --------------------------
nfs4_run_open_task
rpc_run_task
rpc_execute
rpc_set_active
rpc_make_runnable
(waiting)
rpc_async_schedule
nfs4_open_prepare
nfs_wait_on_sequence
nfs_umount_begin
rpc_killall_tasks
rpc_wake_up_task
rpc_wake_up_queued_task
spin_lock(tk_waitqueue == NULL)
BUG()
rpc_sleep_on
spin_lock(&q->lock)
__rpc_sleep_on
task->tk_waitqueue = q
Signed-off-by: Stanislav Kinsbursky <skinsbursky@openvz.org>
Cc: stable@kernel.org
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This fixes a race in which the task->tk_callback() puts the rpc_task
to sleep, setting a new callback. Under certain circumstances, the current
code may end up executing the task->tk_action before it gets round to the
callback.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
* 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (177 commits)
drm/radeon: fixup refcounts in radeon dumb create ioctl.
drm: radeon: *_cs_packet_parse_vline() cleanup
radeon: merge list_del()/list_add_tail() to list_move_tail()
drm: Retry i2c transfer of EDID block after failure
drm/radeon/kms: fix typo in atom overscan setup
drm: Hold the mode mutex whilst probing for sysfs status
drm/nouveau: fix __nouveau_fence_wait performance
drm/nv40: attempt to reserve just enough vram for all 32 channels
drm/nv50: check for vm traps on every gr irq
drm/nv50: decode vm faults some more
drm/nouveau: add nouveau_enum_find() util function
drm/nouveau: properly handle pushbuffer check failures
drm/nvc0: remove vm hack forcing large/small pages to not share a PDE
drm/i915: disable opregion lid detection for now.
drm/i915: Only wait on a pending flip if we intend to write to the buffer
drm/i915/dp: Sanity check eDP existence
drm: add cap bit to denote if dumb ioctl is available or not.
drm/core: add ioctl to query device/driver capabilities
drm/radeon/kms: allow max clock of 340 Mhz on hdmi 1.3+
drm/radeon/kms: add cayman pci ids
...
Fix amd64_debug_display_dimm_sizes() arguments order per convention (pvt
is always first). Also, the now second arg denotes the DCT so adjust its
type.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
A node id can never be negative since we use it as an index into
the DRAM ranges array. This also makes one of the BUG_ON conditions
redundant.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Add the PCI device ids required for driver registration. Remove
pvt->ctl_name and use the family descriptor directly, instead. Then,
bump driver version and fixup its format. Finally, enable DRAM ECC
decoding on F15h.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
F15h has the same ECC symbol size options as F10h revD and later so
adjust checks to that. Simplify code a bit.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
With increasing number of PCI function ids, add the PCI function id
in the define name instead of its symbolic name in the BKDG for more
clarity.
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Drop static tables which map the bits in F2x80 to a chip select size in
favor of functions doing the mapping with some bit fiddling. Also, add
F15 support.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This function is relevant for F10h and higher, and it has only one
callsite so drop its function pointer from the low_ops struct.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
F15h sys_addr to chip select mapping is almost identical to F10h's so
reuse that. Rename functions on that path accordingly.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Replace per-DCT macros with smarter ones, drop hack and look for the
spare rank on all chip selects on a channel.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
When node interleaving is enabled, a subset of the addr[14:12] bits has
to be removed in order to get the normalized DCT address of the DRAM
channel. The actual number of bits to remove is determined by F1x[1,
0][7C:40][IntlvEn]. Do this correctly.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
On revC3 and revE Fam10h machines and later, non-interleaved graphics
framebuffer memory under the 16G mark can be swapped with a region
located at the bottom of memory so that the GPU can use the interleaved
region and thus two channels. Add support for that.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
The address bits from MC4_STATUS differ only between K8 and the rest so
no need for a per-family method.
No functional change.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Use the struct mce directly instead of copying from it into a custom
struct err_regs.
No functionality change.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
The only difference is that F10h used to sport ganged DCTs and F15h
doesn't so adjust the F10h routine and reuse it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Remove reporting of errors with UC bit set - this is done by the MCE
decoding code anyway and this driver deals with DRAM ECC errors only. UC
(NB uncorrectable error) doesn't necessarily mean it is a DRAM error.
Remove unused macros while at it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
The fact whether we are chipkill capable or not does not have any
bearing when computing the channel index on a ganged DCT configuration
so remove that. Also, simplify debug statements. Finally, remove old
error injection leftovers, while at it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Remove family names from macro names, drop single bit defines and
comment their meaning instead.
No functional change.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
* Restrict DCT ganged mode check since only Fam10h supports it
* Adjust DRAM type detection for BD since it only supports DDR3
* Remove second and thus unneeded DCLR read in k8_early_channel_count() - we do
that in read_mc_regs()
* Cleanup comments and remove family names from register macros
* Remove unused defines
There should be no functional change resulting from this patch.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Do not read DBAM regs twice and simplify code around them.
There should be no functional change resulting from this patch.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
