Linus Torvalds [Fri, 25 May 2012 15:38:26 +0000 (08:38 -0700)]
Merge tag 'hda-switcheroo' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull VGA-switcheroo audio client support for HD-audio from Takashi Iwai.
This depended on the recent drm pull.
* tag 'hda-switcheroo' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - unlock on error in azx_interrupt()
ALSA: hda - Support VGA-switcheroo
ALSA: hda - Export snd_hda_lock_devices()
ALSA: hda - Check the dead HDMI audio controller by vga-switcheroo
Linus Torvalds [Fri, 25 May 2012 15:30:35 +0000 (08:30 -0700)]
Merge tag 'cris-for-linus' of git://jni.nu/cris
Pull CRIS changes from Jesper Nilsson:
"No major changes here, but fixes some compile errors for CRIS, some
small style issues, some documentation and as a bonus nukes a couple
of obsolete rtc-files and related code."
* tag 'cris-for-linus' of git://jni.nu/cris:
cris: Remove old legacy "-traditional" flag from arch-v10/lib/Makefile
CRIS: Remove legacy RTC drivers
cris/mm/fault.c: Port OOM changes to do_page_fault
cris:fix the wrong function declear
CRIS: Add _sdata to vmlinux.lds.S
cris: posix_types.h, include asm-generic/posix_types.h
CRIS: Update documentation
cris/arch-v32: cryptocop: Use kzalloc
net:removed the unused variable
cris:removed the unused variable
CRISv32: Correct name of read_mostly section.
Linus Torvalds [Fri, 25 May 2012 15:23:32 +0000 (08:23 -0700)]
Merge tag 'mmc-merge-for-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc
Pull MMC changes from Chris Ball
- at91-mci: This driver will be replaced by atmel-mci in 3.7.
- atmel-mci: Add support for old at91-mci hardware.
- dw_mmc: Allow multiple controllers; this previously caused
corruption.
- imxmmc: Remove this driver, replaced by mxcmmc.
- mmci: Add device tree support.
- omap: Allow multiple controllers.
- omap_hsmmc: Auto CMD12, DDR support.
- tegra: Support SD 3.0 spec.
Fix up the usual trivial conflicts in feature-removal-schedule.txt
* tag 'mmc-merge-for-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (38 commits)
mmc: at91-mci: this driver is now deprecated
mmc: omap_hsmmc: pass IRQF_ONESHOT to request_threaded_irq
mmc: block: Allow disabling 512B sector size emulation
mmc: atmel-mci: add debug logs
mmc: atmel-mci: add support for version lower than v2xx
mmc: atmel-mci: change the state machine for compatibility with old IP
mmc: atmel-mci: the r/w proof capability lack was not well managed
mmc: dw_mmc: Fixed sdio interrupt mask bit setting bug
mmc: omap: convert to module_platform_driver
mmc: omap: make it behave well as a module
mmc: omap: convert to per instance workqueue
mmc: core: Remove dead code
mmc: card: Avoid null pointer dereference
mmc: core: Prevent eMMC VCC supply to be cut from late init
mmc: dw_mmc: make multiple instances of dw_mci_card_workqueue
mmc: queue: remove redundant memsets
mmc: queue: rename mmc_request function
mmc: core: skip card initialization if power class selection fails
mmc: core: fix the signaling 1.8V for HS200
mmc: core: fix the decision of HS200/DDR card-type
...
Jonas Bonn [Fri, 25 May 2012 06:24:49 +0000 (08:24 +0200)]
openrisc: use generic strncpy_from_user
As per commits 2922585b9329 ("lib: Sparc's strncpy_from_user is generic
enough, move under lib/") and 92ae03f2ef99 ("x86: merge 32/64-bit
versions of 'strncpy_from_user()' and speed it up"), and corresponding
discussion on linux-arch.
Signed-off-by: Jonas Bonn <jonas@southpole.se> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 25 May 2012 15:14:59 +0000 (08:14 -0700)]
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext2, ext3 and quota fixes from Jan Kara:
"Interesting bits are:
- removal of a special i_mutex locking subclass (I_MUTEX_QUOTA) since
quota code does not need i_mutex anymore in any unusual way.
- backport (from ext4) of a fix of a checkpointing bug (missing cache
flush) that could lead to fs corruption on power failure
The rest are just random small fixes & cleanups."
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
ext2: trivial fix to comment for ext2_free_blocks
ext2: remove the redundant comment for ext2_export_ops
ext3: return 32/64-bit dir name hash according to usage type
quota: Get rid of nested I_MUTEX_QUOTA locking subclass
quota: Use precomputed value of sb_dqopt in dquot_quota_sync
ext2: Remove i_mutex use from ext2_quota_write()
reiserfs: Remove i_mutex use from reiserfs_quota_write()
ext4: Remove i_mutex use from ext4_quota_write()
ext3: Remove i_mutex use from ext3_quota_write()
quota: Fix double lock in add_dquot_ref() with CONFIG_QUOTA_DEBUG
jbd: Write journal superblock with WRITE_FUA after checkpointing
jbd: protect all log tail updates with j_checkpoint_mutex
jbd: Split updating of journal superblock and marking journal empty
ext2: do not register write_super within VFS
ext2: Remove s_dirt handling
ext2: write superblock only once on unmount
ext3: update documentation with barrier=1 default
ext3: remove max_debt in find_group_orlov()
jbd: Refine commit writeout logic
Linus Torvalds [Thu, 24 May 2012 23:17:30 +0000 (16:17 -0700)]
Merge branch 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM changes from Avi Kivity:
"Changes include additional instruction emulation, page-crossing MMIO,
faster dirty logging, preventing the watchdog from killing a stopped
guest, module autoload, a new MSI ABI, and some minor optimizations
and fixes. Outside x86 we have a small s390 and a very large ppc
update.
Regarding the new (for kvm) rebaseless workflow, some of the patches
that were merged before we switch trees had to be rebased, while
others are true pulls. In either case the signoffs should be correct
now."
Fix up trivial conflicts in Documentation/feature-removal-schedule.txt
arch/powerpc/kvm/book3s_segment.S and arch/x86/include/asm/kvm_para.h.
I suspect the kvm_para.h resolution ends up doing the "do I have cpuid"
check effectively twice (it was done differently in two different
commits), but better safe than sorry ;)
* 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (125 commits)
KVM: make asm-generic/kvm_para.h have an ifdef __KERNEL__ block
KVM: s390: onereg for timer related registers
KVM: s390: epoch difference and TOD programmable field
KVM: s390: KVM_GET/SET_ONEREG for s390
KVM: s390: add capability indicating COW support
KVM: Fix mmu_reload() clash with nested vmx event injection
KVM: MMU: Don't use RCU for lockless shadow walking
KVM: VMX: Optimize %ds, %es reload
KVM: VMX: Fix %ds/%es clobber
KVM: x86 emulator: convert bsf/bsr instructions to emulate_2op_SrcV_nobyte()
KVM: VMX: unlike vmcs on fail path
KVM: PPC: Emulator: clean up SPR reads and writes
KVM: PPC: Emulator: clean up instruction parsing
kvm/powerpc: Add new ioctl to retreive server MMU infos
kvm/book3s: Make kernel emulated H_PUT_TCE available for "PR" KVM
KVM: PPC: bookehv: Fix r8/r13 storing in level exception handler
KVM: PPC: Book3S: Enable IRQs during exit handling
KVM: PPC: Fix PR KVM on POWER7 bare metal
KVM: PPC: Fix stbux emulation
KVM: PPC: bookehv: Use lwz/stw instead of PPC_LL/PPC_STL for 32-bit fields
...
Linus Torvalds [Thu, 24 May 2012 23:02:08 +0000 (16:02 -0700)]
Merge tag 'stable/for-linus-3.5-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
Pull Xen updates from Konrad Rzeszutek Wilk:
"Features:
* Extend the APIC ops implementation and add IRQ_WORKER vector
support so that 'perf' can work properly.
* Fix self-ballooning code, and balloon logic when booting as initial
domain.
* Move array printing code to generic debugfs
* Support XenBus domains.
* Lazily free grants when a domain is dead/non-existent.
* In M2P code use batching calls
Bug-fixes:
* Fix NULL dereference in allocation failure path (hvc_xen)
* Fix unbinding of IRQ_WORKER vector during vCPU hot-unplug
* Fix HVM guest resume - we would leak an PIRQ value instead of
reusing the existing one."
Fix up add-add onflicts in arch/x86/xen/enlighten.c due to addition of
apic ipi interface next to the new apic_id functions.
* tag 'stable/for-linus-3.5-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen: do not map the same GSI twice in PVHVM guests.
hvc_xen: NULL dereference on allocation failure
xen: Add selfballoning memory reservation tunable.
xenbus: Add support for xenbus backend in stub domain
xen/smp: unbind irqworkX when unplugging vCPUs.
xen: enter/exit lazy_mmu_mode around m2p_override calls
xen/acpi/sleep: Enable ACPI sleep via the __acpi_os_prepare_sleep
xen: implement IRQ_WORK_VECTOR handler
xen: implement apic ipi interface
xen/setup: update VA mapping when releasing memory during setup
xen/setup: Combine the two hypercall functions - since they are quite similar.
xen/setup: Populate freed MFNs from non-RAM E820 entries and gaps to E820 RAM
xen/setup: Only print "Freeing XXX-YYY pfn range: Z pages freed" if Z > 0
xen/gnttab: add deferred freeing logic
debugfs: Add support to print u32 array in debugfs
xen/p2m: An early bootup variant of set_phys_to_machine
xen/p2m: Collapse early_alloc_p2m_middle redundant checks.
xen/p2m: Allow alloc_p2m_middle to call reserve_brk depending on argument
xen/p2m: Move code around to allow for better re-usage.
Pull sparc changes from David S. Miller:
"This has the generic strncpy_from_user() implementation architectures
can now use, which we've been developing on linux-arch over the past
few days.
For good measure I ran both a 32-bit and a 64-bit glibc testsuite run,
and the latter of which pointed out an adjustment I needed to make to
sparc's user_addr_max() definition. Linus, you were right, STACK_TOP
was not the right thing to use, even on sparc itself :-)
From Sam Ravnborg, we have a conversion of sparc32 over to the common
alloc_thread_info_node(), since the aspect which originally blocked
our doing so (sun4c) has been removed."
Fix up trivial arch/sparc/Kconfig and lib/Makefile conflicts.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc: Fix user_addr_max() definition.
lib: Sparc's strncpy_from_user is generic enough, move under lib/
kernel: Move REPEAT_BYTE definition into linux/kernel.h
sparc: Increase portability of strncpy_from_user() implementation.
sparc: Optimize strncpy_from_user() zero byte search.
sparc: Add full proper error handling to strncpy_from_user().
sparc32: use the common implementation of alloc_thread_info_node()
Linus Torvalds [Thu, 24 May 2012 21:14:46 +0000 (14:14 -0700)]
Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
Pull XFS update from Ben Myers:
- Removal of xfsbufd
- Background CIL flushes have been moved to a workqueue.
- Fix to xfs_check_page_type applicable to filesystems where
blocksize < page size
- Fix for stale data exposure when extsize hints are used.
- A series of xfs_buf cache cleanups.
- Fix for XFS_IOC_ALLOCSP
- Cleanups for includes and removal of xfs_lrw.[ch].
- Moved all busy extent handling to it's own file so that it is easier
to merge with userspace.
- Fix for log mount failure.
- Fix to enable inode reclaim during quotacheck at mount time.
- Fix for delalloc quota accounting.
- Fix for memory reclaim deadlock on agi buffer.
- Fixes for failed writes and to clean up stale delalloc blocks.
- Fix to use GFP_NOFS in blkdev_issue_flush
- SEEK_DATA/SEEK_HOLE support
* 'for-linus' of git://oss.sgi.com/xfs/xfs: (57 commits)
xfs: add trace points for log forces
xfs: fix memory reclaim deadlock on agi buffer
xfs: fix delalloc quota accounting on failure
xfs: protect xfs_sync_worker with s_umount semaphore
xfs: introduce SEEK_DATA/SEEK_HOLE support
xfs: make xfs_extent_busy_trim not static
xfs: make XBF_MAPPED the default behaviour
xfs: flush outstanding buffers on log mount failure
xfs: Properly exclude IO type flags from buffer flags
xfs: clean up xfs_bit.h includes
xfs: move xfs_do_force_shutdown() and kill xfs_rw.c
xfs: move xfs_get_extsz_hint() and kill xfs_rw.h
xfs: move xfs_fsb_to_db to xfs_bmap.h
xfs: clean up busy extent naming
xfs: move busy extent handling to it's own file
xfs: move xfsagino_t to xfs_types.h
xfs: use iolock on XFS_IOC_ALLOCSP calls
xfs: kill XBF_DONTBLOCK
xfs: kill xfs_read_buf()
xfs: kill XBF_LOCK
...
Linus Torvalds [Thu, 24 May 2012 21:09:47 +0000 (14:09 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull more relocation fixes from Peter Anvin:
"These are additional symbols that have been found to either be
absolute or look like they might end up being absolute on one version
of GNU ld or another. Unfortunately we have since that a different
GNU ld version, 2.21, can generate bogus absolute symbols; again, this
would have caused a malfunctioning kernel on x86-32 if relocated.
The relocs.c changes changed silent corruption to a build time error.
It is worth noting that if the various barrier symbols we use were
more consistent in the namespace used this probably could be reduced
to a single regexp; if nothing else it looks like there is migration
toward a common __(start|stop)___.* namespace."
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, relocs: Add jiffies and jiffies_64 to the relative whitelist
x86-32, relocs: Whitelist more symbols for ld bug workaround
Linus Torvalds [Thu, 24 May 2012 21:01:46 +0000 (14:01 -0700)]
Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull GPIO driver changes from Grant Likely:
"Lots of gpio changes, both to core code and drivers.
Changes do touch architecture code to remove the need for separate
arm/gpio.h includes in most architectures.
Some new drivers are added, and a number of gpio drivers are converted
to use irq_domains for gpio inputs used as interrupts. Device tree
support has been amended to allow multiple gpio_chips to use the same
device tree node.
Remaining changes are primarily bug fixes."
* tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux-2.6: (33 commits)
gpio/generic: initialize basic_mmio_gpio shadow variables properly
gpiolib: Remove 'const' from data argument of gpiochip_find()
gpio/rc5t583: add gpio driver for RICOH PMIC RC5T583
gpiolib: quiet gpiochip_add boot message noise
gpio: mpc8xxx: Prevent NULL pointer deref in demux handler
gpio/lpc32xx: Add device tree support
gpio: Adjust of_xlate API to support multiple GPIO chips
gpiolib: Implement devm_gpio_request_one()
gpio-mcp23s08: dbg_show: fix pullup configuration display
Add support for TCA6424A
gpio/omap: (re)fix wakeups on level-triggered GPIOs
gpio/omap: fix broken context restore for non-OFF mode transitions
gpio/omap: fix missing check in *_runtime_suspend()
gpio/omap: remove cpu_is_omapxxxx() checks from *_runtime_resume()
gpio/omap: remove suspend/resume callbacks
gpio/omap: remove retrigger variable in gpio_irq_handler
gpio/omap: remove saved_wakeup field from struct gpio_bank
gpio/omap: remove suspend_wakeup field from struct gpio_bank
gpio/omap: remove saved_fallingdetect, saved_risingdetect
gpio/omap: remove virtual_irq_start variable
...
Linus Torvalds [Thu, 24 May 2012 20:57:18 +0000 (13:57 -0700)]
Merge tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull device tree changes from Grant Likely:
"Mostly documentation updates, but also includes an empty stub for
non-CONFIG_OF builds."
* tag 'devicetree-for-linus' of git://git.secretlab.ca/git/linux-2.6:
dt/documentation: Fix value format description
dt: add vendor prefix for EM Microelectronics
ARM: DT: Add binding for GIC virtualization extentions (VGIC)
of/irq: add empty irq_of_parse_and_map() for non-dt builds
Linus Torvalds [Thu, 24 May 2012 20:56:24 +0000 (13:56 -0700)]
Merge tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull SPI changes from Grant Likely:
"Bug fixes and new features for SPI device drivers. Also move device
tree support code out of drivers/of and into drivers/spi/spi.c where
it makes more sense."
* tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6:
spi: By default setup spi_masters with 1 chipselect and dynamics bus number
SPI: PRIMA2: use the newest APIs of PINCTRL to fix compiling errors
spi/spi-fsl-spi: reference correct pdata in fsl_spi_cs_control
spi: refactor spi-coldfire-qspi to use SPI queue framework.
spi/omap2-mcspi: convert to the pump message infrastructure
spi/rspi: add dmaengine support
spi/topcliff: use correct __devexit_p annotation
spi: Dont call prepare/unprepare transfer if not populated
spi/ep93xx: clean probe/remove routines
spi/devicetree: Move devicetree support code into spi directory
spi: use module_pci_driver
spi/omap2-mcspi: Trivial optimisation
spi: omap2-mcspi: add support for pm_runtime autosuspend
spi/omap: Remove bus_num usage for instance index
OMAP : SPI : use devm_* functions
spi: omap2-mcspi: convert to module_platform_driver
spi: omap2-mcspi: make it behave as a module
Linus Torvalds [Thu, 24 May 2012 20:55:24 +0000 (13:55 -0700)]
Merge tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux-2.6
Pull irqdomain changes from Grant Likely:
"Minor changes and fixups for irqdomain infrastructure. The most
important change adds the ability to remove a registered irqdomain."
* tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux-2.6:
irqdomain: Document size parameter of irq_domain_add_linear()
irqdomain: trivial pr_fmt conversion.
irqdomain: Kill off duplicate definitions.
irqdomain: Make irq_domain_simple_map() static.
irqdomain: Export remaining public API symbols.
irqdomain: Support removal of IRQ domains.
Linus Torvalds [Thu, 24 May 2012 20:54:31 +0000 (13:54 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha
Pull alpha updates from Matt Turner:
"This pull adds the implementations of some Tru64 syscalls which allow
some proprietary software such as the C compiler to work on Linux.
Also, it adds some big-endian ioread functions to help us get closer
to building allyesconfig."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha:
alpha: add io{read,write}{16,32}be functions
alpha: implement various OSF/1 stat syscalls
alpha: implement setsysinfo(SSI_LMF) as a no-op
David S. Miller [Thu, 24 May 2012 20:41:58 +0000 (13:41 -0700)]
sparc: Fix user_addr_max() definition.
We need to use TASK_SIZE because for 64-bit tasks the value
of STACK_TOP actually sits in the middle of the address space
so we'll get false-negatives.
Adjust the TASK_SIZE definition on sparc64 to accomodate this,
in the context in which user_addr_max() is used we have the
test_thread_flag() definition available but not the one for
test_tsk_thread_flag().
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Thu, 24 May 2012 20:29:46 +0000 (13:29 -0700)]
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer updates from Thomas Gleixner.
Various trivial conflict fixups in arch Kconfig due to addition of
unrelated entries nearby. And one slightly more subtle one for sparc32
(new user of GENERIC_CLOCKEVENTS), fixed up as per Thomas.
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (31 commits)
timekeeping: Fix a few minor newline issues.
time: remove obsolete declaration
ntp: Fix a stale comment and a few stray newlines.
ntp: Correct TAI offset during leap second
timers: Fixup the Kconfig consolidation fallout
x86: Use generic time config
unicore32: Use generic time config
um: Use generic time config
tile: Use generic time config
sparc: Use: generic time config
sh: Use generic time config
score: Use generic time config
s390: Use generic time config
openrisc: Use generic time config
powerpc: Use generic time config
mn10300: Use generic time config
mips: Use generic time config
microblaze: Use generic time config
m68k: Use generic time config
m32r: Use generic time config
...
Linus Torvalds [Thu, 24 May 2012 19:57:47 +0000 (12:57 -0700)]
Merge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Pull IEEE 1394 (FireWire) subsystem updates from Stefan Richter:
- Fix mismatch between DMA mapping direction (was wrong) and DMA
synchronization direction (was correct) of isochronous reception
buffers of userspace drivers if vma-mapped for R/W access. For
example, libdc1394 was affected.
- more consistent retry stategy in device discovery/ rediscovery, and
improved failure diagnostics
- various small cleanups, e.g. use SCSI layer's DMA mapping API in
firewire-sbp2
* tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
firewire: sbp2: document the absence of alignment requirements
firewire: sbp2: remove superfluous blk_queue_max_segment_size() call
firewire: sbp2: use scsi_dma_(un)map
firewire: sbp2: give correct DMA device to scsi framework
firewire: core: fw_device_refresh(): clean up error handling
firewire: core: log config rom reading errors
firewire: core: log error in case of failed bus manager lock
firewire: move rcode_string() to core
firewire: core: improve reread_config_rom() interface
firewire: core: wait for inaccessible devices after bus reset
firewire: ohci: omit spinlock IRQ flags where possible
firewire: ohci: correct signedness of a local variable
firewire: core: fix DMA mapping direction
firewire: use module_pci_driver
Linus Torvalds [Thu, 24 May 2012 19:42:54 +0000 (12:42 -0700)]
Merge branch 'drm-core-next' of git://people.freedesktop.org/~airlied/linux
Pull main drm updates from Dave Airlie:
"This is the main merge window request for the drm.
It's big, but jam packed will lots of features and of course 0
regressions. (okay maybe there'll be one).
Highlights:
- new KMS drivers for server GPU chipsets: ast, mgag200 and cirrus
(qemu only). These drivers use the generic modesetting drivers.
- initial prime/dma-buf support for i915, nouveau, radeon, udl and
exynos
- switcheroo audio support: so GPUs with HDMI can turn off the sound
driver without crashing stuff.
- There are some patches drifting outside drivers/gpu into x86 and
EFI for better handling of multiple video adapters in Apple Macs,
they've got correct acks except one trivial fixup.
- Core:
edid parser has better DMT and reduced blanking support,
crtc properties,
plane properties,
- Drivers:
exynos: add 2D core accel support, prime support, hdmi features
intel: more Haswell support, initial Valleyview support, more
hdmi infoframe fixes, update MAINTAINERS for Daniel, lots of
cleanups and fixes
radeon: more HDMI audio support, improved GPU lockup recovery
support, remove nested mutexes, less memory copying on PCIE, fix
bus master enable race (kexec), improved fence handling
gma500: cleanups, 1080p support, acpi fixes
nouveau: better nva3 memory reclocking, kepler accel (needs
external firmware rip), async buffer moves on nv84+ hw.
I've some more dma-buf patches that rely on the dma-buf merge for vmap
stuff, and I've a few fixes building up, but I'd decided I'd better
get rid of the main pull sooner rather than later, so the audio guys
are also unblocked."
Fix up trivial conflict due to some duplicated changes in
drivers/gpu/drm/i915/intel_ringbuffer.c
* 'drm-core-next' of git://people.freedesktop.org/~airlied/linux: (605 commits)
drm/nouveau/nvd9: Fix GPIO initialisation sequence.
drm/nouveau: Unregister switcheroo client on exit
drm/nouveau: Check dsm on switcheroo unregister
drm/nouveau: fix a minor annoyance in an output string
drm/nouveau: turn a BUG into a WARN
drm/nv50: decode PGRAPH DATA_ERROR = 0x24
drm/nouveau/disp: fix dithering not being enabled on some eDP macbooks
drm/nvd9/copy: initialise copy engine, seems to work like nvc0
drm/nvc0/ttm: use copy engines for async buffer moves
drm/nva3/ttm: use copy engine for async buffer moves
drm/nv98/ttm: add in a (disabled) crypto engine buffer copy method
drm/nv84/ttm: use crypto engine for async buffer copies
drm/nouveau/ttm: untangle code to support accelerated buffer moves
drm/nouveau/fbcon: use fence for sync, rather than notifier
drm/nv98/crypt: non-stub implementation of the engine hooks
drm/nouveau/fifo: turn all fifo modules into engine modules
drm/nv50/graph: remove ability to do interrupt-driven context switching
drm/nv50: remove manual context unload on context destruction
drm/nv50: remove execution engine context saves on suspend
drm/nv50/fifo: use hardware channel kickoff functionality
...
Pull more networking updates from David Miller:
"Ok, everything from here on out will be bug fixes."
1) One final sync of wireless and bluetooth stuff from John Linville.
These changes have all been in his tree for more than a week, and
therefore have had the necessary -next exposure. John was just away
on a trip and didn't have a change to send the pull request until a
day or two ago.
2) Put back some defines in user exposed header file areas that were
removed during the tokenring purge. From Stephen Hemminger and Paul
Gortmaker.
3) A bug fix for UDP hash table allocation got lost in the pile due to
one of those "you got it.. no I've got it.." situations. :-)
From Tim Bird.
4) SKB coalescing in TCP needs to have stricter checks, otherwise we'll
try to coalesce overlapping frags and crash. Fix from Eric Dumazet.
5) RCU routing table lookups can race with free_fib_info(), causing
crashes when we deref the device pointers in the route. Fix by
releasing the net device in the RCU callback. From Yanmin Zhang.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (293 commits)
tcp: take care of overlaps in tcp_try_coalesce()
ipv4: fix the rcu race between free_fib_info and ip_route_output_slow
mm: add a low limit to alloc_large_system_hash
ipx: restore token ring define to include/linux/ipx.h
if: restore token ring ARP type to header
xen: do not disable netfront in dom0
phy/micrel: Fix ID of KSZ9021
mISDN: Add X-Tensions USB ISDN TA XC-525
gianfar:don't add FCB length to hard_header_len
Bluetooth: Report proper error number in disconnection
Bluetooth: Create flags for bt_sk()
Bluetooth: report the right security level in getsockopt
Bluetooth: Lock the L2CAP channel when sending
Bluetooth: Restore locking semantics when looking up L2CAP channels
Bluetooth: Fix a redundant and problematic incoming MTU check
Bluetooth: Add support for Foxconn/Hon Hai AR5BBU22 0489:E03C
Bluetooth: Fix EIR data generation for mgmt_device_found
Bluetooth: Fix Inquiry with RSSI event mask
Bluetooth: improve readability of l2cap_seq_list code
Bluetooth: Fix skb length calculation
...
Linus Torvalds [Thu, 24 May 2012 18:39:34 +0000 (11:39 -0700)]
Merge branch 'perf-uprobes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull user-space probe instrumentation from Ingo Molnar:
"The uprobes code originates from SystemTap and has been used for years
in Fedora and RHEL kernels. This version is much rewritten, reviews
from PeterZ, Oleg and myself shaped the end result.
This tree includes uprobes support in 'perf probe' - but SystemTap
(and other tools) can take advantage of user probe points as well.
Sample usage of uprobes via perf, for example to profile malloc()
calls without modifying user-space binaries.
First boot a new kernel with CONFIG_UPROBE_EVENT=y enabled.
If you don't know which function you want to probe you can pick one
from 'perf top' or can get a list all functions that can be probed
within libc (binaries can be specified as well):
$ perf probe -F -x /lib/libc.so.6
To probe libc's malloc():
$ perf probe -x /lib64/libc.so.6 malloc
Added new event:
probe_libc:malloc (on 0x7eac0)
You can now use it in all perf tools, such as:
perf record -e probe_libc:malloc -aR sleep 1
Make use of it to create a call graph (as the flat profile is going to
look very boring):
$ perf record -e probe_libc:malloc -gR make
[ perf record: Woken up 173 times to write data ]
[ perf record: Captured and wrote 44.190 MB perf.data (~1930712
The core uprobes design is fairly straightforward: uprobes probe
points register themselves at (inode:offset) addresses of
libraries/binaries, after which all existing (or new) vmas that map
that address will have a software breakpoint injected at that address.
vmas are COW-ed to preserve original content. The probe points are
kept in an rbtree.
If user-space executes the probed inode:offset instruction address
then an event is generated which can be recovered from the regular
perf event channels and mmap-ed ring-buffer.
Multiple probes at the same address are supported, they create a
dynamic callback list of event consumers.
The basic model is further complicated by the XOL speedup: the
original instruction that is probed is copied (in an architecture
specific fashion) and executed out of line when the probe triggers.
The XOL area is a single vma per process, with a fixed number of
entries (which limits probe execution parallelism).
The API: uprobes are installed/removed via
/sys/kernel/debug/tracing/uprobe_events, the API is integrated to
align with the kprobes interface as much as possible, but is separate
to it.
Injecting a probe point is privileged operation, which can be relaxed
by setting perf_paranoid to -1.
You can use multiple probes as well and mix them with kprobes and
regular PMU events or tracepoints, when instrumenting a task."
Fix up trivial conflicts in mm/memory.c due to previous cleanup of
unmap_single_vma().
* 'perf-uprobes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
perf probe: Detect probe target when m/x options are absent
perf probe: Provide perf interface for uprobes
tracing: Fix kconfig warning due to a typo
tracing: Provide trace events interface for uprobes
tracing: Extract out common code for kprobes/uprobes trace events
tracing: Modify is_delete, is_return from int to bool
uprobes/core: Decrement uprobe count before the pages are unmapped
uprobes/core: Make background page replacement logic account for rss_stat counters
uprobes/core: Optimize probe hits with the help of a counter
uprobes/core: Allocate XOL slots for uprobes use
uprobes/core: Handle breakpoint and singlestep exceptions
uprobes/core: Rename bkpt to swbp
uprobes/core: Make order of function parameters consistent across functions
uprobes/core: Make macro names consistent
uprobes: Update copyright notices
uprobes/core: Move insn to arch specific structure
uprobes/core: Remove uprobe_opcode_sz
uprobes/core: Make instruction tables volatile
uprobes: Move to kernel/events/
uprobes/core: Clean up, refactor and improve the code
...
Michael Cree [Wed, 30 Nov 2011 13:01:40 +0000 (08:01 -0500)]
alpha: add io{read,write}{16,32}be functions
These functions are used in some PCI drivers with big-endian
MMIO space.
Admittedly it is almost certain that no one this side of the
Moon would use such a card in an Alpha but it does get us
closer to being able to build allyesconfig or allmodconfig,
and it enables the Debian default generic config to build.
Tested-by: Raúl Porcel <armin76@gentoo.org> Signed-off-by: Michael Cree <mcree@orcon.net.nz> Signed-off-by: Matt Turner <mattst88@gmail.com>
Mans Rullgard [Fri, 26 Aug 2011 17:52:14 +0000 (18:52 +0100)]
alpha: implement setsysinfo(SSI_LMF) as a no-op
This allows running software using the Tru64 license manager.
For simplicity, no check for a valid license is done. This
should not be seen as encouraging software piracy.
Signed-off-by: Mans Rullgard <mans@mansr.com> Signed-off-by: Matt Turner <mattst88@gmail.com>
Linus Torvalds [Thu, 24 May 2012 17:34:29 +0000 (10:34 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input layer updates from Dmitry Torokhov:
- a bunch of new drivers (DA9052/53 touchscreenn controller, Synaptics
Navpoint, LM8333 keypads, Wacom I2C touhscreen);
- updates to existing touchpad drivers (ALPS, Sntelic);
- Wacom driver now supports Intuos5;
- device-tree bindings in numerous drivers;
- other cleanups and fixes.
Fix annoying conflict in drivers/input/tablet/wacom_wac.c that I think
implies that the input layer device naming is broken, but let's see. I
brough it up with Dmitry.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (57 commits)
Input: matrix-keymap - fix building keymaps
Input: spear-keyboard - document DT bindings
Input: spear-keyboard - add device tree bindings
Input: matrix-keymap - wire up device tree support
Input: matrix-keymap - uninline and prepare for device tree support
Input: adp5588 - add support for gpio names
Input: omap-keypad - dynamically handle register offsets
Input: synaptics - fix compile warning
MAINTAINERS: adjust input-related patterns
Input: ALPS - switch to using input_mt_report_finger_count
Input: ALPS - add semi-MT support for v4 protocol
Input: Add Synaptics NavPoint (PXA27x SSP/SPI) driver
Input: atmel_mxt_ts - dump each message on just 1 line
Input: atmel_mxt_ts - do not read extra (checksum) byte
Input: atmel_mxt_ts - verify object size in mxt_write_object
Input: atmel_mxt_ts - only allow root to update firmware
Input: atmel_mxt_ts - use CONFIG_PM_SLEEP
Input: sentelic - report device's production serial number
Input: tl6040-vibra - Device Tree support
Input: evdev - properly handle read/write with count 0
...
Linus Torvalds [Thu, 24 May 2012 17:21:51 +0000 (10:21 -0700)]
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- some V4L2 API updates needed by embedded devices
- DVB API extensions for ATSC-MH delivery system, used in US for mobile
TV
- new tuners for fc0011/0012/0013 and tua9001
- a new dvb driver for af9033/9035
- a new ATSC-MH frontend (lg2160)
- new remote controller keymaps
- Removal of a few legacy webcam driver that got replaced by gspca on
several kernel versions ago
- a new driver for Exynos 4/5 webcams(s5pp fimc-lite)
- a new webcam sensor driver (smiapp)
- a new video input driver for embedded (sta2x1xx)
- several improvements, fixes, cleanups, etc inside the drivers.
Manually fix up conflicts due to err() -> dev_err() conversion in
drivers/staging/media/easycap/easycap_main.c
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (484 commits)
[media] saa7134-cards: Remove a PCI entry added by mistake
[media] radio-sf16fmi: add support for SF16-FMD
[media] rc-loopback: remove duplicate line
[media] patch for Asus My Cinema PS3-100 (1043:48cd)
[media] au0828: Move the Kconfig knob under V4L_USB_DRIVERS
[media] em28xx: simple comment fix
[media] [resend] radio-sf16fmr2: add PnP support for SF16-FMD2
[media] smiapp: Use v4l2_ctrl_new_int_menu() instead of v4l2_ctrl_new_custom()
[media] smiapp: Add support for 8-bit uncompressed formats
[media] smiapp: Allow generic quirk registers
[media] smiapp: Use non-binning limits if the binning limit is zero
[media] smiapp: Initialise rval in smiapp_read_nvm()
[media] smiapp: Round minimum pre_pll up rather than down in ip_clk_freq check
[media] smiapp: Use 8-bit reads only before identifying the sensor
[media] smiapp: Quirk for sensors that only do 8-bit reads
[media] smiapp: Pass struct sensor to register writing commands instead of i2c_client
[media] smiapp: Allow using external clock from the clock framework
[media] zl10353: change .read_snr() to report SNR as a 0.1 dB
[media] media: add support to gspca/pac7302.c for 093a:2627 (Genius FaceCam 300)
[media] m88rs2000 - only flip bit 2 on reg 0x70 on 16th try
...
H. Peter Anvin [Thu, 24 May 2012 14:01:38 +0000 (07:01 -0700)]
x86, relocs: Add jiffies and jiffies_64 to the relative whitelist
The symbol jiffies is created in the linker script as an alias to
jiffies_64. Unfortunately this is done outside any section, and
apparently GNU ld 2.21 doesn't carry the section with it, so we end up
with an absolute symbol and therefore a broken kernel.
Add jiffies and jiffies_64 to the whitelist.
The most disturbing bit with this discovery is that it shows that we
have had multiple linker bugs in this area crossing multiple
generations, and have been silently building bad kernels for some time.
Dave Airlie [Thu, 24 May 2012 09:17:16 +0000 (10:17 +0100)]
Merge branch 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-core-next
Ben was distracted:
"Apologies for being really late with this, feel free to bash me in the
future so I remember on time!
Overview:
- improvements to reclocking (especially memory) on nva3+
- kepler accel support (if you have blob ucode)
- better inter-channel synchronisation on nv84+
- async ttm buffer moves on nv84+ (earlier cards don't have a non-PGRAPH
engine that's useful)"
* 'drm-nouveau-next' of git://anongit.freedesktop.org/git/nouveau/linux-2.6: (60 commits)
drm/nouveau/nvd9: Fix GPIO initialisation sequence.
drm/nouveau: Unregister switcheroo client on exit
drm/nouveau: Check dsm on switcheroo unregister
drm/nouveau: fix a minor annoyance in an output string
drm/nouveau: turn a BUG into a WARN
drm/nv50: decode PGRAPH DATA_ERROR = 0x24
drm/nouveau/disp: fix dithering not being enabled on some eDP macbooks
drm/nvd9/copy: initialise copy engine, seems to work like nvc0
drm/nvc0/ttm: use copy engines for async buffer moves
drm/nva3/ttm: use copy engine for async buffer moves
drm/nv98/ttm: add in a (disabled) crypto engine buffer copy method
drm/nv84/ttm: use crypto engine for async buffer copies
drm/nouveau/ttm: untangle code to support accelerated buffer moves
drm/nouveau/fbcon: use fence for sync, rather than notifier
drm/nv98/crypt: non-stub implementation of the engine hooks
drm/nouveau/fifo: turn all fifo modules into engine modules
drm/nv50/graph: remove ability to do interrupt-driven context switching
drm/nv50: remove manual context unload on context destruction
drm/nv50: remove execution engine context saves on suspend
drm/nv50/fifo: use hardware channel kickoff functionality
...
Dmitry Torokhov [Thu, 24 May 2012 08:10:20 +0000 (01:10 -0700)]
Input: matrix-keymap - fix building keymaps
Keymaps used by drivers based on matrix-keymap facilities are arrays of
unsigned shorts, not chars. Treating them otherwise produces corrupted
keymaps.
Andreas Heider [Sun, 20 May 2012 23:14:50 +0000 (00:14 +0100)]
drm/nouveau: Check dsm on switcheroo unregister
Currently vga_switcheroo_unregister_handler is called unconditionally when
nouveau is unloaded, even when nouveau never registered a handler. This
interferes with other switcheroo handlers, as vga_switcheroo doesn't check who
called unregister_handler, but simply unregisters the current handler. This
patch adds a check so unregister is only called if a handler was registered by
nouveau before.
Signed-off-by: Andreas Heider <andreas@meetr.de> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Ben Skeggs [Tue, 1 May 2012 10:48:08 +0000 (20:48 +1000)]
drm/nouveau/fifo: turn all fifo modules into engine modules
Been tested on each major revision that's relevant here, but I'm sure there
are still bugs waiting to be ironed out.
This is a *very* invasive change.
There's a couple of pieces left that I don't like much (eg. other engines
using fifo_priv for the channel count), but that's an artefact of there
being a master channel list still. This is changing, slowly.
Ben Skeggs [Tue, 1 May 2012 00:14:07 +0000 (10:14 +1000)]
drm/nouveau/fifo: remove all the "special" engine hooks
All the places this stuff is actually needed tends to be chipset-specific
anyway, so we're able to just inline the register bashing instead.
The parts of the common code that still directly touch PFIFO temporarily
have conditionals, these will be removed in subsequent commits that will
refactor the fifo modules into engine modules like graph/mpeg etc.
Ben Skeggs [Mon, 30 Apr 2012 03:55:29 +0000 (13:55 +1000)]
drm/nouveau/fence: convert to exec engine, and improve channel sync
Now have a somewhat simpler semaphore sync implementation for nv17:nv84,
and a switched to using semaphores as fences on nv84+ and making use of
the hardware's >= acquire operation.
Ben Skeggs [Mon, 30 Apr 2012 16:33:43 +0000 (11:33 -0500)]
drm/nouveau: create real execution engine for software object class
Just a cleanup more or less, and to remove the need for special handling of
software objects.
This removes a heap of documentation on dma/graph object formats. The info
is very out of date with our current understanding, and is far better
documented in rnndb in envytools git.
Marcin Slusarz [Wed, 25 Apr 2012 21:20:33 +0000 (23:20 +0200)]
drm/nouveau: base fence timeout on time of emission
Wait loop can be interrupted by signal, so if signals are raised
periodically (e.g. SIGALRM) this loop may never finish. Use
emission time as a base for fence timeout.
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Ben Skeggs [Sun, 5 Feb 2012 23:58:09 +0000 (09:58 +1000)]
drm/nva3/pm: another few magic regs, and slightly better 0x004018 handling
Not entirely convinced 0x004018 transitions are correct yet, but, it's
an improvement.
The 750MHz value comes from fiddling with the binary driver + coolbits on
two different DDR3 NVA8 chipsets (T510 NVS3100M, and NVS300), not a clue
where this number comes from.
Ben Skeggs [Thu, 2 Feb 2012 01:43:31 +0000 (11:43 +1000)]
drm/nva3/pm: begin to restructure memory clock changes + another magic
The binary driver appears to do various bits and pieces of the memory
clock frequency change at different times, depending on the particular
transition that's occuring. I've attempted to replicate this here
for div->pll, pll->div and div->div transitions.
With some additional (patches upcoming) magic regs being bashed, this
allows me to correctly transition between all 3 perflvls on NVS300.
pll->pll transitions will *not* work correctly at the moment, pending
me tricking the binary driver into doing one and seeing how to correctly
handle it.
This patch also handles (hopefully) 0x1110e0, which appears to need
changing depending on whether in PLL or divider mode.. Maybe. We'll
see.
It appears TCP coalescing, and more specifically commit b081f85c297
(net: implement tcp coalescing in tcp_queue_rcv()) should take care of
possible segment overlaps in receive queue. This was properly done in
the case of out_or_order_queue by the caller.
For example, segment at tail of queue have sequence 1000-2000, and we
add a segment with sequence 1500-2500.
This can happen in case of retransmits.
In this case, just don't do the coalescing.
Reported-by: Sergio Correia <lists@uece.net> Signed-off-by: Eric Dumazet <edumazet@google.com> Tested-by: Sergio Correia <lists@uece.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Yanmin Zhang [Wed, 23 May 2012 15:39:45 +0000 (15:39 +0000)]
ipv4: fix the rcu race between free_fib_info and ip_route_output_slow
We hit a kernel OOPS.
<3>[23898.789643] BUG: sleeping function called from invalid context at
/data/buildbot/workdir/ics/hardware/intel/linux-2.6/arch/x86/mm/fault.c:1103
<3>[23898.862215] in_atomic(): 0, irqs_disabled(): 0, pid: 10526, name:
Thread-6683
<4>[23898.967805] HSU serial 0000:00:05.1: 0000:00:05.2:HSU serial prevented me
to suspend...
<4>[23899.258526] Pid: 10526, comm: Thread-6683 Tainted: G W 3.0.8-137685-ge7742f9 #1
<4>[23899.357404] HSU serial 0000:00:05.1: 0000:00:05.2:HSU serial prevented me
to suspend...
<4>[23899.904225] Call Trace:
<4>[23899.989209] [<c1227f50>] ? pgtable_bad+0x130/0x130
<4>[23900.000416] [<c1238c2a>] __might_sleep+0x10a/0x110
<4>[23900.007357] [<c1228021>] do_page_fault+0xd1/0x3c0
<4>[23900.013764] [<c18e9ba9>] ? restore_all+0xf/0xf
<4>[23900.024024] [<c17c007b>] ? napi_complete+0x8b/0x690
<4>[23900.029297] [<c1227f50>] ? pgtable_bad+0x130/0x130
<4>[23900.123739] [<c1227f50>] ? pgtable_bad+0x130/0x130
<4>[23900.128955] [<c18ea0c3>] error_code+0x5f/0x64
<4>[23900.133466] [<c1227f50>] ? pgtable_bad+0x130/0x130
<4>[23900.138450] [<c17f6298>] ? __ip_route_output_key+0x698/0x7c0
<4>[23900.144312] [<c17f5f8d>] ? __ip_route_output_key+0x38d/0x7c0
<4>[23900.150730] [<c17f63df>] ip_route_output_flow+0x1f/0x60
<4>[23900.156261] [<c181de58>] ip4_datagram_connect+0x188/0x2b0
<4>[23900.161960] [<c18e981f>] ? _raw_spin_unlock_bh+0x1f/0x30
<4>[23900.167834] [<c18298d6>] inet_dgram_connect+0x36/0x80
<4>[23900.173224] [<c14f9e88>] ? _copy_from_user+0x48/0x140
<4>[23900.178817] [<c17ab9da>] sys_connect+0x9a/0xd0
<4>[23900.183538] [<c132e93c>] ? alloc_file+0xdc/0x240
<4>[23900.189111] [<c123925d>] ? sub_preempt_count+0x3d/0x50
Function free_fib_info resets nexthop_nh->nh_dev to NULL before releasing
fi. Other cpu might be accessing fi. Fixing it by delaying the releasing.
With the patch, we ran MTBF testing on Android mobile for 12 hours
and didn't trigger the issue.
Thank Eric for very detailed review/checking the issue.
Signed-off-by: Yanmin Zhang <yanmin_zhang@linux.intel.com> Signed-off-by: Kun Jiang <kunx.jiang@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Tim Bird [Wed, 23 May 2012 13:33:35 +0000 (13:33 +0000)]
mm: add a low limit to alloc_large_system_hash
UDP stack needs a minimum hash size value for proper operation and also
uses alloc_large_system_hash() for proper NUMA distribution of its hash
tables and automatic sizing depending on available system memory.
On some low memory situations, udp_table_init() must ignore the
alloc_large_system_hash() result and reallocs a bigger memory area.
As we cannot easily free old hash table, we leak it and kmemleak can
issue a warning.
This patch adds a low limit parameter to alloc_large_system_hash() to
solve this problem.
We then specify UDP_HTABLE_SIZE_MIN for UDP/UDPLite hash table
allocation.
Reported-by: Mark Asselstine <mark.asselstine@windriver.com> Reported-by: Tim Bird <tim.bird@am.sony.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Thu, 24 May 2012 01:11:45 +0000 (18:11 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull first series of signal handling cleanups from Al Viro:
"This is just the first part of the queue (about a half of it);
assorted fixes all over the place in signal handling.
This one ends with all sigsuspend() implementations switched to
generic one (->saved_sigmask-based).
With this, a bunch of assorted old buglets are fixed and most of the
missing bits of NOTIFY_RESUME hookup are in place. Two more fixes sit
in arm and um trees respectively, and there's a couple of broken ones
that need obvious fixes - parisc and avr32 check TIF_NOTIFY_RESUME
only on one of two codepaths; fixes for that will happen in the next
series"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (55 commits)
unicore32: if there's no handler we need to restore sigmask, syscall or no syscall
xtensa: add handling of TIF_NOTIFY_RESUME
microblaze: drop 'oldset' argument of do_notify_resume()
microblaze: handle TIF_NOTIFY_RESUME
score: add handling of NOTIFY_RESUME to do_notify_resume()
m68k: add TIF_NOTIFY_RESUME and handle it.
sparc: kill ancient comment in sparc_sigaction()
h8300: missing checks of __get_user()/__put_user() return values
frv: missing checks of __get_user()/__put_user() return values
cris: missing checks of __get_user()/__put_user() return values
powerpc: missing checks of __get_user()/__put_user() return values
sh: missing checks of __get_user()/__put_user() return values
sparc: missing checks of __get_user()/__put_user() return values
avr32: struct old_sigaction is never used
m32r: struct old_sigaction is never used
xtensa: xtensa_sigaction doesn't exist
alpha: tidy signal delivery up
score: don't open-code force_sigsegv()
cris: don't open-code force_sigsegv()
blackfin: don't open-code force_sigsegv()
...
This implied a reference counting bug and the problem happened during
mbind().
mbind() applies a new memory policy to a range and uses mbind_range() to
merge existing VMAs or split them as necessary. In the event of splits,
mpol_dup() will allocate a new struct mempolicy and maintain existing
reference counts whose rules are documented in
Documentation/vm/numa_memory_policy.txt .
The problem occurs with shared memory policies. The vm_op->set_policy
increments the reference count if necessary and split_vma() and
vma_merge() have already handled the existing reference counts.
However, policy_vma() screws it up by replacing an existing
vma->vm_policy with one that potentially has the wrong reference count
leading to a premature free. This patch removes the damage caused by
policy_vma().
With this patch applied Dave's trinity tool runs an mbind test for 5
minutes without error. /proc/slabinfo reported that there are no
numa_policy or shared_policy_node objects allocated after the test
completed and the shared memory region was deleted.
Signed-off-by: Mel Gorman <mgorman@suse.de> Cc: Dave Jones <davej@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Stephen Wilson <wilsons@start.ca> Cc: Christoph Lameter <cl@linux.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: <stable@vger.kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Thu, 24 May 2012 00:42:39 +0000 (17:42 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
Pull user namespace enhancements from Eric Biederman:
"This is a course correction for the user namespace, so that we can
reach an inexpensive, maintainable, and reasonably complete
implementation.
Highlights:
- Config guards make it impossible to enable the user namespace and
code that has not been converted to be user namespace safe.
- Use of the new kuid_t type ensures the if you somehow get past the
config guards the kernel will encounter type errors if you enable
user namespaces and attempt to compile in code whose permission
checks have not been updated to be user namespace safe.
- All uids from child user namespaces are mapped into the initial
user namespace before they are processed. Removing the need to add
an additional check to see if the user namespace of the compared
uids remains the same.
- With the user namespaces compiled out the performance is as good or
better than it is today.
- For most operations absolutely nothing changes performance or
operationally with the user namespace enabled.
- The worst case performance I could come up with was timing 1
billion cache cold stat operations with the user namespace code
enabled. This went from 156s to 164s on my laptop (or 156ns to
164ns per stat operation).
- (uid_t)-1 and (gid_t)-1 are reserved as an internal error value.
Most uid/gid setting system calls treat these value specially
anyway so attempting to use -1 as a uid would likely cause
entertaining failures in userspace.
- If setuid is called with a uid that can not be mapped setuid fails.
I have looked at sendmail, login, ssh and every other program I
could think of that would call setuid and they all check for and
handle the case where setuid fails.
- If stat or a similar system call is called from a context in which
we can not map a uid we lie and return overflowuid. The LFS
experience suggests not lying and returning an error code might be
better, but the historical precedent with uids is different and I
can not think of anything that would break by lying about a uid we
can't map.
- Capabilities are localized to the current user namespace making it
safe to give the initial user in a user namespace all capabilities.
My git tree covers all of the modifications needed to convert the core
kernel and enough changes to make a system bootable to runlevel 1."
Fix up trivial conflicts due to nearby independent changes in fs/stat.c
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (46 commits)
userns: Silence silly gcc warning.
cred: use correct cred accessor with regards to rcu read lock
userns: Convert the move_pages, and migrate_pages permission checks to use uid_eq
userns: Convert cgroup permission checks to use uid_eq
userns: Convert tmpfs to use kuid and kgid where appropriate
userns: Convert sysfs to use kgid/kuid where appropriate
userns: Convert sysctl permission checks to use kuid and kgids.
userns: Convert proc to use kuid/kgid where appropriate
userns: Convert ext4 to user kuid/kgid where appropriate
userns: Convert ext3 to use kuid/kgid where appropriate
userns: Convert ext2 to use kuid/kgid where appropriate.
userns: Convert devpts to use kuid/kgid where appropriate
userns: Convert binary formats to use kuid/kgid where appropriate
userns: Add negative depends on entries to avoid building code that is userns unsafe
userns: signal remove unnecessary map_cred_ns
userns: Teach inode_capable to understand inodes whose uids map to other namespaces.
userns: Fail exec for suid and sgid binaries with ids outside our user namespace.
userns: Convert stat to return values mapped from kuids and kgids
userns: Convert user specfied uids and gids in chown into kuids and kgid
userns: Use uid_eq gid_eq helpers when comparing kuids and kgids in the vfs
...
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