18 Jan, 2016
14 commits
-
Pull security subsystem updates from James Morris:
- EVM gains support for loading an x509 cert from the kernel
(EVM_LOAD_X509), into the EVM trusted kernel keyring.- Smack implements 'file receive' process-based permission checking for
sockets, rather than just depending on inode checks.- Misc enhancments for TPM & TPM2.
- Cleanups and bugfixes for SELinux, Keys, and IMA.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (41 commits)
selinux: Inode label revalidation performance fix
KEYS: refcount bug fix
ima: ima_write_policy() limit locking
IMA: policy can be updated zero times
selinux: rate-limit netlink message warnings in selinux_nlmsg_perm()
selinux: export validatetrans decisions
gfs2: Invalid security labels of inodes when they go invalid
selinux: Revalidate invalid inode security labels
security: Add hook to invalidate inode security labels
selinux: Add accessor functions for inode->i_security
security: Make inode argument of inode_getsecid non-const
security: Make inode argument of inode_getsecurity non-const
selinux: Remove unused variable in selinux_inode_init_security
keys, trusted: seal with a TPM2 authorization policy
keys, trusted: select hash algorithm for TPM2 chips
keys, trusted: fix: *do not* allow duplicate key options
tpm_ibmvtpm: properly handle interrupted packet receptions
tpm_tis: Tighten IRQ auto-probing
tpm_tis: Refactor the interrupt setup
tpm_tis: Get rid of the duplicate IRQ probing code
... -
Pull audit updates from Paul Moore:
"Seven audit patches for 4.5, all very minor despite the diffstat.The diffstat churn for linux/audit.h can be attributed to needing to
reshuffle the linux/audit.h header to fix the seccomp auditing issue
(see the commit description for details).Besides the seccomp/audit fix, most of the fixes are around trying to
improve the connection with the audit daemon and a Kconfig
simplification. Nothing crazy, and everything passes our little
audit-testsuite"* 'upstream' of git://git.infradead.org/users/pcmoore/audit:
audit: always enable syscall auditing when supported and audit is enabled
audit: force seccomp event logging to honor the audit_enabled flag
audit: Delete unnecessary checks before two function calls
audit: wake up threads if queue switched from limited to unlimited
audit: include auditd's threads in audit_log_start() wait exception
audit: remove audit_backlog_wait_overflow
audit: don't needlessly reset valid wait time -
Commit b8d3c4c3009d ("mm/huge_memory.c: don't split THP page when
MADV_FREE syscall is called") introduced this new function, but got the
error handling for when pmd_trans_huge_lock() fails wrong. In the
failure case, the lock has not been taken, and we should not unlock on
the way out.Cc: Minchan Kim
Cc: Andrew Morton
Signed-off-by: Linus Torvalds -
This just fixes a warning on 64-bit builds:
drivers/gpu/drm/vc4/vc4_validate.c: In function ‘validate_gl_shader_rec’:
drivers/gpu/drm/vc4/vc4_validate.c:864:12: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘size_t {aka long unsigned int}’ [-Wformat=]Reported-by: Linus Torvalds
Signed-off-by: Dave Airlie
Signed-off-by: Linus Torvalds -
Pull drm updates from Dave Airlie:
"This is the main drm pull request for 4.5. I don't think I've missed
anything too major, I'm mostly back at work now but I'll probably get
some sleep in 5 years time.Summary:
New drivers:
- etnaviv:GPU driver for the 3D core on the Vivante core used in numerous
ARM boards.Highlights:
Core:
- Atomic suspend/resume helpers
- Move the headers to using userspace friendlier types.
- Documentation updates
- Lots of struct_mutex removal.
- Bunch of DP MST fixes from AMD.Panel:
- More DSI helpers
- Support for some new basic panelsi915:
- Basic Kabylake support
- DP link training and detect code refactoring
- fbc/psr fixes
- FIFO underrun fixes
- SDE interrupt handling fixes
- dma-buf/fence support in pageflip path.
- GPU side for MST audio supportradeon/amdgpu:
- Drop UMS support
- GPUVM/Scheduler optimisations
- Initial Powerplay support for Tonga/Fiji/CZ/ST
- ACP audio prerequisitesnouveau:
- GK20a instmem improvements
- PCIE link speed change supportmsm:
- DSI support for msm8960/apq8064tegra:
- Host1X support for Tegra210 SoCvc4:
- 3D acceleration supportarmada:
- Get rid of struct mutextda998x:
- Atomic modesetting support
- TMDS clock limitationsomapdrm:
- Atomic modesetting support
- improved TILER performancerockchip:
- RK3036 VOP support
- Atomic modesetting support
- Synopsys DW MIPI DSI supportexynos:
- Runtime PM support
- of_graph binding for DP panels
- Cleanup of IPP code
- Configurable plane support
- Kernel panic fixes at release time"* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (711 commits)
drm/fb_cma_helper: Remove implicit call to disable_unused_functions
drm/amdgpu: add missing irq.h include
drm/vmwgfx: Fix a width / pitch mismatch on framebuffer updates
drm/vmwgfx: Fix an incorrect lock check
drm: nouveau: fix nouveau_debugfs_init prototype
drm/nouveau/pci: fix check in nvkm_pcie_set_link
drm/amdgpu: validate duplicates first
drm/amdgpu: move VM page tables to the LRU end on CS v2
drm/ttm: add ttm_bo_move_to_lru_tail function v2
drm/ttm: fix adding foreign BOs to the swap LRU
drm/ttm: fix adding foreign BOs to the LRU during init v2
drm/radeon: use kobj_to_dev()
drm/amdgpu: use kobj_to_dev()
drm/amdgpu/cz: force vce clocks when sclks are forced
drm/amdgpu/cz: force uvd clocks when sclks are forced
drm/amdgpu/cz: add code to enable forcing VCE clocks
drm/amdgpu/cz: add code to enable forcing UVD clocks
drm/amdgpu: fix lost sync_to if scheduler is enabled.
drm/amd/powerplay: fix static checker warning for return meaningless value.
drm/sysfs: use kobj_to_dev()
... -
…/git/shuah/linux-kselftest
Pull kselftest updates from Shuah Khan:
"This 14 patch update:- adds a new test for intel_pstate driver
- adds empty string and async test cases to firmware class tests
- fixes and cleans up several existing tests"* tag 'linux-kselftest-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
selftests: firmware: add empty string and async tests
firmware: actually return NULL on failed request_firmware_nowait()
test: firmware_class: add asynchronous request trigger
test: firmware_class: use kstrndup() where appropriate
test: firmware_class: report errors properly on failure
selftests/seccomp: fix 32-bit build warnings
add breakpoints/.gitignore
add ptrace/.gitignore
update .gitignore in selftests/timers
update .gitignore in selftests/vm
tools, testing, add test for intel_pstate driver
selftest/ipc: actually test it
selftests/capabilities: actually test it
selftests/capabilities: clean up for Makefile -
Pull parsic updates from Helge Deller:
"This patchset includes two major fixes which are both scheduled for
stable:First, __ARCH_SI_PREAMBLE_SIZE was defined with a wrong value.
Second, huge page pte and TLB changes needed protection with a
spinlock. Other than that there are just some trivial optimizations
and cleanups"* 'parisc-4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Protect huge page pte changes with spinlocks
parisc: Imporove debug info about space registers and TLB configuration
parisc: Drop parisc-specific NSIGTRAP define
parisc: Fix __ARCH_SI_PREAMBLE_SIZE
parisc: Reduce overhead of parisc_requires_coherency()
parisc: Initialize PCI bridge cache line and default latency -
misc i915 fixes all over the place.
* tag 'drm-intel-next-fixes-2016-01-14' of git://anongit.freedesktop.org/drm-intel:
drm/i915/gen9: Set PIN_ZONE_4G end to 4GB - 1 page
drm/i915: Widen return value for reservation_object_wait_timeout_rcu to long.
drm/i915: intel_hpd_init(): Fix suspend/resume reprobing
drm/i915: shut up gen8+ SDE irq dmesg noise, again
drm/i915: Restore inhibiting the load of the default context
drm/i915: Tune down rpm wakelock debug checks
drm/i915: Avoid writing relocs with addresses in non-canonical form
drm/i915: Move Braswell stop_machine GGTT insertion workaround -
Since your main drm-next pull isn't out of the door yet I figured I might
as well flush out drm-misc instead of delaying for 4.6. It's really just
random stuff all over, biggest thing probably connector_mask tracking from
Maarten.* tag 'topic/drm-misc-2016-01-17' of git://anongit.freedesktop.org/drm-intel: (24 commits)
drm/fb_cma_helper: Remove implicit call to disable_unused_functions
drm/sysfs: use kobj_to_dev()
drm/i915: Init power domains early in driver load
drm: Do not set connector->encoder in drivers
apple-gmux: Add initial documentation
drm: move MODULE_PARM_DESC to other file
drm/edid: index CEA/HDMI mode tables using the VIC
drm/atomic: Remove drm_atomic_connectors_for_crtc.
drm/i915: Update connector_mask during readout, v2.
drm: Remove opencoded drm_gem_object_release_handle()
drm: Do not set outparam on error during GEM handle allocation
drm/docs: more leftovers from the big vtable documentation pile
drm/atomic-helper: Reject legacy flips on a disabled pipe
drm/atomic: add connector mask to drm_crtc_state.
drm/tegra: Use __drm_atomic_helper_reset_connector for subclassing connector state, v2.
drm/atomic: Add __drm_atomic_helper_connector_reset, v2.
drm/i915: Set connector_state->connector using the helper.
drm: Use a normal idr allocation for the obj->name
drm: Only bump object-reference count when adding first handle
drm: Balance error path for GEM handle allocation
... -
Merge second patch-bomb from Andrew Morton:
- more MM stuff:
- Kirill's page-flags rework
- Kirill's now-allegedly-fixed THP rework
- MADV_FREE implementation
- DAX feature work (msync/fsync). This isn't quite complete but DAX
is new and it's good enough and the guys have a handle on what
needs to be done - I expect this to be wrapped in the next week or
two.- some vsprintf maintenance work
- various other misc bits
* emailed patches from Andrew Morton : (145 commits)
printk: change recursion_bug type to bool
lib/vsprintf: factor out %pN[F] handler as netdev_bits()
lib/vsprintf: refactor duplicate code to special_hex_number()
printk-formats.txt: remove unimplemented %pT
printk: help pr_debug and pr_devel to optimize out arguments
lib/test_printf.c: test dentry printing
lib/test_printf.c: add test for large bitmaps
lib/test_printf.c: account for kvasprintf tests
lib/test_printf.c: add a few number() tests
lib/test_printf.c: test precision quirks
lib/test_printf.c: check for out-of-bound writes
lib/test_printf.c: don't BUG
lib/kasprintf.c: add sanity check to kvasprintf
lib/vsprintf.c: warn about too large precisions and field widths
lib/vsprintf.c: help gcc make number() smaller
lib/vsprintf.c: expand field_width to 24 bits
lib/vsprintf.c: eliminate potential race in string()
lib/vsprintf.c: move string() below widen_string()
lib/vsprintf.c: pull out padding code from dentry_name()
printk: do cond_resched() between lines while outputting to consoles
... -
Pull GPIO updates from Linus Walleij:
"Here is the bulk of GPIO changes for v4.5.Notably there are big refactorings mostly by myself, aimed at getting
the gpio_chip into a shape that makes me believe I can proceed to
preserve state for a proper userspace ABI (character device) that has
already been proposed once, but resulted in the feedback that I need
to go back and restructure stuff. So I've been restructuring stuff.
On the way I ran into brokenness (return code from the get_value()
callback) and had to fix it. Also, refactored generic GPIO to be
simpler.Some of that is still waiting to trickle down from the subsystems all
over the kernel that provide random gpio_chips, I've touched every
single GPIO driver in the kernel now, oh man I didn't know I was
responsible for so much...Apart from that we're churning along as usual.
I took some effort to test and retest so it should merge nicely and we
shook out a couple of bugs in -next.Infrastructural changes:
- In struct gpio_chip, rename the .dev node to .parent to better
reflect the fact that this is not the GPIO struct device
abstraction. We will add that soon so this would be totallt
confusing.- It was noted that the driver .get_value() callbacks was sometimes
reporting negative -ERR values to the gpiolib core, expecting them
to be propagated to consumer gpiod_get_value() and gpio_get_value()
calls. This was not happening, so as there was a mess of drivers
returning negative errors and some returning "anything else than
zero" to indicate that a line was active. As some would have bit
31 set to indicate "line active" it clashed with negative error
codes. This is fixed by the largeish series clamping values in all
drivers with !!value to [0,1] and then augmenting the code to
propagate error codes to consumers. (Includes some ACKed patches
in other subsystems.)- Add a void *data pointer to struct gpio_chip. The container_of()
design pattern is indeed very nice, but we want to reform the
struct gpio_chip to be a non-volative, stateless business, and keep
states internal to the gpiolib to be able to hold on to the state
when adding a proper userspace ABI (character device) further down
the road. To achieve this, drivers need a handle at the internal
state that is not dependent on their struct gpio_chip() so we add
gpiochip_add_data() and gpiochip_get_data() following the pattern
of many other subsystems. All the "use gpiochip data pointer"
patches transforms drivers to this scheme.- The Generic GPIO chip header has been merged into the general
header, and the custom header for that
removed. Instead of having a separate mm_gpio_chip struct for
these generic drivers, merge that into struct gpio_chip,
simplifying the code and removing the need for separate and
confusing includes.Misc improvements:
- Stabilize the way GPIOs are looked up from the ACPI legacy
specification.- Incremental driver features for PXA, PCA953X, Lantiq (patches from
the OpenWRT community), RCAR, Zynq, PL061, 104-idi-48New drivers:
- Add a GPIO chip to the ALSA SoC AC97 driver.
- Add a new Broadcom NSP SoC driver (this lands in the pinctrl dir,
but the branch is merged here too to account for infrastructural
changes).- The sx150x driver now supports the sx1502"
* tag 'gpio-v4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (220 commits)
gpio: generic: make bgpio_pdata always visible
gpiolib: fix chip order in gpio list
gpio: mpc8xxx: Do not use gpiochip_get_data() in mpc8xxx_gpio_save_regs()
gpio: mm-lantiq: Do not use gpiochip_get_data() in ltq_mm_save_regs()
gpio: brcmstb: Allow building driver for BMIPS_GENERIC
gpio: brcmstb: Set endian flags for big-endian MIPS
gpio: moxart: fix build regression
gpio: xilinx: Do not use gpiochip_get_data() in xgpio_save_regs()
leds: pca9532: use gpiochip data pointer
leds: tca6507: use gpiochip data pointer
hid: cp2112: use gpiochip data pointer
bcma: gpio: use gpiochip data pointer
avr32: gpio: use gpiochip data pointer
video: fbdev: via: use gpiochip data pointer
gpio: pch: Optimize pch_gpio_get()
Revert "pinctrl: lantiq: Implement gpio_chip.to_irq"
pinctrl: nsp-gpio: use gpiochip data pointer
pinctrl: vt8500-wmt: use gpiochip data pointer
pinctrl: exynos5440: use gpiochip data pointer
pinctrl: at91-pio4: use gpiochip data pointer
... -
Pull watchdog updates from Wim Van Sebroeck:
"This adds following items:- watchdog restart handler support
- watchdog reboot notifier support
- watchdog sysfs attributes
- support for the following new devices: AMD Mullins platform, AMD
Carrizo platform, meson8b SoC, CSRatlas7, TS-4800, Alphascale
asm9260-wdt, Zodiac, Sigma Designs SMP86xx/SMP87xx
- Changes in refcounting for the watchdog core
- watchdog core improvements
- and small fixes"* git://www.linux-watchdog.org/linux-watchdog: (60 commits)
watchdog: asm9260: remove __init and __exit annotations
watchdog: Drop pointer to watchdog device from struct watchdog_device
watchdog: ziirave: Use watchdog infrastructure to create sysfs attributes
watchdog: Add support for creating driver specific sysfs attributes
watchdog: kill unref/ref ops
watchdog: stmp3xxx: Remove unused variables
watchdog: add MT7621 watchdog support
hwmon: (sch56xx) Drop watchdog driver data reference count callbacks
watchdog: da9055_wdt: Drop reference counting
watchdog: da9052_wdt: Drop reference counting
watchdog: Separate and maintain variables based on variable lifetime
watchdog: diag288: Stop re-using watchdog core internal flags
watchdog: Create watchdog device in watchdog_dev.c
watchdog: qcom-wdt: Do not set 'dev' in struct watchdog_device
watchdog: mena21: Do not use device pointer from struct watchdog_device
watchdog: gpio: Do not use device pointer from struct watchdog_device
watchdog: tangox: Print info message using pointer to platform device
watchdog: bcm2835_wdt: Drop log message if watchdog is stopped
devicetree: watchdog: add binding for Sigma Designs SMP8642 watchdog
watchdog: add support for Sigma Designs SMP86xx/SMP87xx
... -
Pull sound updates from Takashi Iwai:
"We've had quite busy weeks in this cycle. Looking at ALSA core, the
significant changes are a few fixes wrt timer and sequencer ioctls
that have been revealed by fuzzer recently. Other than that, ASoC
core got a few updates about DAI link handling, but these are rather
straightforward refactoring.In drivers scene, ASoC received quite lots of new drivers in addition
to bunch of updates for still ongoing Intel Skylake support and
topology API. HD-audio gained a new HDMI/DP hotplug notification via
component. FireWire got a pile of code refactoring/updates with
SCS.1x driver integration.More highlights are shown below.
[ NOTE: this contains also many commits for DRM. This is due to the
pull of drm stable branch into sound tree, as the base of i915 audio
component work for HD-audio. The highlights below don't contain
these DRM changes, as these are supposed to be pulled via drm tree
in anyway sooner or later. ]Core:
- Handful fixes to harden ALSA timer and sequencer ioctls against
races reported by syzkaller fuzzer
- Irq description string can be unique to each card; only for
HD-audio for nowASoC:
- Conversion of the array of DAI links to a list for supporting
dynamically adding and removing DAI links
- Topology API enhancements to make everything more component based
and being able to specify PCM links via topology
- Some more fixes for the topology code, though it is still not final
and ready for enabling in production; we really need to get to the
point where that can be done
- A pile of changes for Intel SkyLake drivers which hopefully deliver
some useful initial functionality for systems with this chipset,
though there is more work still to come
- Lots of new features and cleanups for the Renesas drivers
- ANC support for WM5110
- New drivers: Imagination Technologies IPs, Atmel class D speaker,
Cirrus CS47L24 and WM1831, Dialog DA7128, Realtek RT5659 and
RT56156, Rockchip RK3036, TI PC3168A, and AMD ACP
- Rename PCM1792a driver to be generic pcm179xHD-Audio:
- Use audio component for i915 HDMI/DP hotplug handling
- On-demand binding with i915 driver
- bdl_pos_adj parameter adjustment for Baytrail controllers
- Enable power_save_node for CX20722; this shouldn't lead to
regression, hopefully
- Kabylake HDMI/DP codec support
- Quirks for Lenovo E50-80, Dell Latitude E-series, and other Dell
machines
- A few code refactoringFireWire:
- Lots of code cleanup and refactoring
- Integrate the support of SCS.1x devices into snd-oxfw driver;
snd-scs1x driver is obsoletedUSB-audio:
- Fix possible NULL dereference at disconnection
- A regression fix for Native Instruments devicesMisc:
- A few code cleanups of fm801 driver"* tag 'sound-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (722 commits)
ALSA: timer: Code cleanup
ALSA: timer: Harden slave timer list handling
ALSA: hda - Add fixup for Dell Latitidue E6540
ALSA: timer: Fix race among timer ioctls
ALSA: hda - add codec support for Kabylake display audio codec
ALSA: timer: Fix double unlink of active_list
ALSA: usb-audio: Fix mixer ctl regression of Native Instrument devices
ALSA: hda - fix the headset mic detection problem for a Dell laptop
ALSA: hda - Fix white noise on Dell Latitude E5550
ALSA: hda_intel: add card number to irq description
ALSA: seq: Fix race at timer setup and close
ALSA: seq: Fix missing NULL check at remove_events ioctl
ALSA: usb-audio: Avoid calling usb_autopm_put_interface() at disconnect
ASoC: hdac_hdmi: remove unused hdac_hdmi_query_pin_connlist
ASoC: AMD: Add missing include file
ALSA: hda - Fixup inverted internal mic for Lenovo E50-80
ALSA: usb: Add native DSD support for Oppo HA-1
ASoC: Make aux_dev more like a generic component
ASoC: bcm2835: cleanup includes by ordering them alphabetically
ASoC: AMD: Manage ACP 2.x SRAM banks power
... -
Pull documentation updates from Jon Corbet:
"A relatively boring cycle in the docs tree. There's a few kernel-doc
fixes and various document tweaks.One patch reaches out of the documentation subtree to fix a comment in
init/do_mounts_rd.c. There didn't seem to be anybody more appropriate
to take that one, so I accepted it"* tag 'docs-4.5' of git://git.lwn.net/linux: (29 commits)
thermal: add description for integral_cutoff unit
Documentation: update libhugetlbfs site url
Documentation: Explain pci=conf1,conf2 more verbosely
DMA-API: fix confusing sentence in Documentation/DMA-API.txt
Documentation: translations: update linux cross reference link
Documentation: fix typo in CodingStyle
init, Documentation: Remove ramdisk_blocksize mentions
Documentation-getdelays: Apply a recommendation from "checkpatch.pl" in main()
Documentation: HOWTO: update versions from 3.x to 4.x
Documentation: remove outdated references from translations
Doc: treewide: Fix grammar "a" to "an"
Documentation: cpu-hotplug: Fix sysfs mount instructions
can-doc: Add hint about getting timestamps
Fix CFQ I/O scheduler parameter name in documentation
Documentation: arm: remove dead links from Marvell Berlin docs
Documentation: HOWTO: update code cross reference link
Doc: Docbook/iio: Fix typo in iio.tmpl
DocBook: make index.html generation less verbose by default
DocBook: Cleanup: remove an unused $(call) line
DocBook: Add a help message for DOCBOOKS env var
...
17 Jan, 2016
26 commits
-
`recursion_bug' is used as recursion_bug toggle, so make it `bool'.
Signed-off-by: Sergey Senozhatsky
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move switch case to the netdev_features_string() and rename it to
netdev_bits(). In the future we can extend it as needed.Here we replace the fallback of %pN from '%p' with possible flags to
sticter '0x%p' without any flags variation.Signed-off-by: Andy Shevchenko
Cc: Rasmus Villemoes
Cc: Joe Perches
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
special_hex_number() is a helper to print a fixed size type in a hex
format with '0x' prefix, zero padding, and small letters. In the module
we have already several copies of such code. Consolidate them under
special_hex_number() helper.There are couple of differences though.
It seems nobody cared about the output in case of CONFIG_KALLSYMS=n,
when printing symbol address, because the asked field width is not
enough to care last 2 characters in the string represantation of the
pointer. Fixed here.The %pNF specifier used to be allowed with a specific field width,
though there is neither any user of it nor mention the possibility in
the documentation.Signed-off-by: Andy Shevchenko
Cc: Rasmus Villemoes
Cc: Joe Perches
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
%pT for task->comm has been proposed (several times, I think), but is
not actually implemented. Remove it from printk-formats.txt and add it
back if/when it gets implemented.Signed-off-by: Rasmus Villemoes
Reviewed-by: Andy Shevchenko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently, pr_debug and pr_devel will not elide function call arguments
appearing in calls to the no_printk for these macros. This is because
all side effects must be honored before proceeding to the 0-value
assignment in no_printk.The behavior is contrary to documentation found in the CodingStyle and
the header file where these functions are declared.This patch corrects that behavior by shunting out the call to no_printk
completely. The format string is still checked by gcc for correctness,
but no code seems to be emitted in common cases.[akpm@linux-foundation.org: remove braces, per Joe]
Fixes: 5264f2f75d86 ("include/linux/printk.h: use and neaten no_printk")
Signed-off-by: Aaron Conole
Reported-by: Dmitry Vyukov
Cc: Joe Perches
Cc: Jason Baron
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Rasmus Villemoes
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Kees Cook
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Following "lib/vsprintf.c: expand field_width to 24 bits", let's add a
test to see that we now actually support bitmaps with 65536 bits.Signed-off-by: Rasmus Villemoes
Acked-by: Kees Cook
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
These should also count as performed tests.
Signed-off-by: Rasmus Villemoes
Acked-by: Kees Cook
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This adds a few tests to test_number, one of which serves to document
another deviation from POSIX/C99 (printing 0 with an explicit precision
of 0).Signed-off-by: Rasmus Villemoes
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Kees Cook
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The kernel's printf doesn't follow the standards in a few corner cases
(which are probably mostly irrelevant). Add tests that document the
current behaviour.Signed-off-by: Rasmus Villemoes
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Kees Cook
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a few padding bytes on either side of the test buffer, and check
that these (and the part of the buffer not used) are untouched by
vsnprintf.Signed-off-by: Rasmus Villemoes
Acked-by: Kees Cook
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
BUG is a completely unnecessarily big hammer, and we're more likely to
get the internal bug reported if we just pr_err() and ensure the test
suite fails.Signed-off-by: Rasmus Villemoes
Acked-by: Kees Cook
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
kasprintf relies on being able to replay the formatting and getting the
same result (in particular, the same length). This will almost always
work, but it is possible that the object pointed to by a %s or %p
argument changed under us (so we might get truncated output). Add a
somewhat paranoid sanity check and let's see if it ever triggers.Signed-off-by: Rasmus Villemoes
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Kees Cook
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The field width is overloaded to pass some extra information for some %p
extensions (e.g. #bits for %pb). But we might silently truncate the
passed value when we stash it in struct printf_spec (see e.g.
"lib/vsprintf.c: expand field_width to 24 bits"). Hopefully 23 value
bits should now be enough for everybody, but if not, let's make some
noise.Do the same for the precision. In both cases, clamping seems more
sensible than truncating. While, according to POSIX, "A negative
precision is taken as if the precision were omitted.", the kernel's
printf has always treated that case as if the precision was 0, so we use
that as lower bound. For the field width, the smallest representable
value is actually -(1<
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Kees Cook
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
One consequence of the reorganization of struct printf_spec to make
field_width 24 bits was that number() gained about 180 bytes. Since
spec is never passed to other functions, we can help gcc make number()
lose most of that extra weight by using local variables for the field
width and precision.Reviewed-by: Andy Shevchenko
Signed-off-by: Rasmus Villemoes
Cc: Al Viro
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Kees Cook
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Maurizio Lombardi reported a problem [1] with the %pb extension: It
doesn't work for sufficiently large bitmaps, since the size is stashed
in the field_width field of the struct printf_spec, which is currently
an s16. Concretely, this manifested itself in
/sys/bus/pseudo/drivers/scsi_debug/map being empty, since the bitmap
printer got a size of 0, which is the 16 bit truncation of the actual
bitmap size.We do want to keep struct printf_spec at 8 bytes so that it can cheaply
be passed by value. The qualifier field is only used for internal
bookkeeping in format_decode, so we might as well use a local variable
for that. This gives us an additional 8 bits, which we can then use for
the field width.To stay in 8 bytes, we need to do a little rearranging and make the type
member a bitfield as well. For consistency, change all the members to
bit fields. gcc doesn't generate much worse code with these changes (in
fact, bloat-o-meter says we save 300 bytes - which I think is a little
surprising).I didn't find a BUILD_BUG/compiletime_assertion/... which would work
outside function context, so for now I just open-coded it.[1] http://thread.gmane.org/gmane.linux.kernel/2034835
[akpm@linux-foundation.org: avoid open-coded BUILD_BUG_ON]
Signed-off-by: Rasmus Villemoes
Reported-by: Maurizio Lombardi
Acked-by: Tejun Heo
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Kees Cook
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
If the string corresponding to a %s specifier can change under us, we
might end up copying a \0 byte to the output buffer. There might be
callers who expect the output buffer to contain a genuine C string whose
length is exactly the snprintf return value (assuming truncation hasn't
happened or has been checked for).We can avoid this by only passing over the source string once, stopping
the first time we meet a nul byte (or when we reach the given
precision), and then letting widen_string() handle left/right space
padding. As a small bonus, this code reuse also makes the generated
code slightly smaller.Signed-off-by: Rasmus Villemoes
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Kees Cook
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This is pure code movement, making sure the widen_string() helper is
defined before the string() function.Signed-off-by: Rasmus Villemoes
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Kees Cook
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Pull out the logic in dentry_name() which handles field width space
padding, in preparation for reusing it from string(). Rename the
widen() helper to move_right(), since it is used for handling the
!(flags & LEFT) case.Signed-off-by: Rasmus Villemoes
Cc: Al Viro
Cc: Andy Shevchenko
Cc: Ingo Molnar
Cc: Joe Perches
Cc: Kees Cook
Cc: Maurizio Lombardi
Cc: Tejun Heo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
@console_may_schedule tracks whether console_sem was acquired through
lock or trylock. If the former, we're inside a sleepable context and
console_conditional_schedule() performs cond_resched(). This allows
console drivers which use console_lock for synchronization to yield
while performing time-consuming operations such as scrolling.However, the actual console outputting is performed while holding
irq-safe logbuf_lock, so console_unlock() clears @console_may_schedule
before starting outputting lines. Also, only a few drivers call
console_conditional_schedule() to begin with. This means that when a
lot of lines need to be output by console_unlock(), for example on a
console registration, the task doing console_unlock() may not yield for
a long time on a non-preemptible kernel.If this happens with a slow console devices, for example a serial
console, the outputting task may occupy the cpu for a very long time.
Long enough to trigger softlockup and/or RCU stall warnings, which in
turn pile more messages, sometimes enough to trigger the next cycle of
warnings incapacitating the system.Fix it by making console_unlock() insert cond_resched() between lines if
@console_may_schedule.Signed-off-by: Tejun Heo
Reported-by: Calvin Owens
Acked-by: Jan Kara
Cc: Dave Jones
Cc: Kyle McMartin
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Boot consoles are typically replaced by proper consoles during the boot
process. This can be problematic if the boot console data is part of
the init section that is reclaimed late during boot. If the proper
console does not register before this point in time, the boot console
will need to be removed (so that the freed memory is not accessed),
leaving the system without output for some time.There are various reasons why the proper console may not register early
enough, such as deferred probe or the driver being a loadable module.
If that happens, there is some amount of time where no console messages
are visible to the user, which in turn can mean that they won't see
crashes or other potentially useful information.To avoid this situation, only remove the boot console when it resides in
the init section. Code exists to replace the boot console by the proper
console when it is registered, keeping a seamless transition between the
boot and proper consoles.Signed-off-by: Thierry Reding
Cc: Arnd Bergmann
Cc: Greg Kroah-Hartman
Cc: Joe Perches
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a helper to check if an object (given an address and a size) is part
of a section (given beginning and end addresses). For convenience, also
provide a helper that performs this check for __init data using the
__init_begin and __init_end limits.Signed-off-by: Thierry Reding
Cc: Arnd Bergmann
Cc: Greg Kroah-Hartman
Cc: Joe Perches
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
stop_machine.o is only built if CONFIG_SMP=y, so this ifdef always
evaluates to true.[akpm@linux-foundation.org: remove now-unneeded ifdef]
Reported-by: Valentin Rothberg
Cc: Chris Wilson
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
uselib hasn't been used since libc5; glibc does not use it. Deprecate
uselib a bit more, by making the default y only if libc5 was widely used
on the plaform.This makes arm64 kernel built with defconfig slightly smaller
bloat-o-meter:
add/remove: 0/3 grow/shrink: 0/2 up/down: 0/-1390 (-1390)
function old new delta
kernel_config_data 18164 18162 -2
uselib_flags 20 - -20
padzero 216 192 -24
sys_uselib 380 - -380
load_elf_library 964 - -964Signed-off-by: Riku Voipio
Reviewed-by: Josh Triplett
Acked-by: Geert Uytterhoeven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
IS_ERR_VALUE() already contains it and so we need to add this only to
the !ptr check. That will allow users of IS_ERR_OR_NULL(), to not add
this compiler flag.Signed-off-by: Viresh Kumar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
As illustrated by commit a3afe70b83fd ("[S390] latencytop s390
support."), HAVE_LATENCYTOP_SUPPORT is defined by an architecture to
advertise an implementation of save_stack_trace_tsk.However, as of 9212ddb5eada ("stacktrace: provide save_stack_trace_tsk()
weak alias") a dummy implementation is provided if STACKTRACE=y. Given
that LATENCYTOP already depends on STACKTRACE_SUPPORT and selects
STACKTRACE, we can remove HAVE_LATENCYTOP_SUPPORT altogether.Signed-off-by: Will Deacon
Acked-by: Heiko Carstens
Cc: Vineet Gupta
Cc: Russell King
Cc: James Hogan
Cc: Michal Simek
Cc: Helge Deller
Acked-by: Michael Ellerman
Cc: "David S. Miller"
Cc: Guan Xuetao
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
