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Andy Shevchenko 71dca95d5c lib/vsprintf: add %*pE[achnops] format specifier 
This allows user to print a given buffer as an escaped string.  The
rules are applied according to an optional mix of flags provided by
additional format letters.

For example, if the given buffer is:

    1b 62 20 5c 43 07 22 90 0d 5d

The result strings would be:
    %*pE            "\eb \C\a"\220\r]"
    %*pEhp          "\x1bb \C\x07"\x90\x0d]"
    %*pEa           "\e\142\040\\\103\a\042\220\r\135"

Please, read Documentation/printk-formats.txt and lib/string_helpers.c
kernel documentation to get further information.

[akpm@linux-foundation.org: tidy up comment layout, per Joe]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Suggested-by: Joe Perches <joe@perches.com>
Cc: "John W . Linville" <linville@tuxdriver.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-10-14 02:18:26 +02:00
..
ABI
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux
2014-10-11 20:34:00 -04:00
accounting
Documentation: use subdir-y to avoid unnecessary built-in.o files
2014-09-26 11:02:55 +02:00
acpi
ACPI / documentation: Remove reference to acpi_platform_device_ids from enumeration.txt
2014-07-12 00:07:05 +02:00
aoe
…
arm
ARM: SoC DT updates for 3.18
2014-10-08 17:22:23 -04:00
arm64
KVM/ARM New features for 3.17 include:
2014-08-05 09:47:45 +02:00
auxdisplay
Documentation: use subdir-y to avoid unnecessary built-in.o files
2014-09-26 11:02:55 +02:00
backlight
…
blackfin
Documentation: add makefiles for more targets
2014-09-26 11:02:56 +02:00
block
doc: queue-sysfs: minor fixes
2014-08-28 14:47:22 +02:00
blockdev
zram: report maximum used memory
2014-10-09 22:26:02 -04:00
bus-devices
…
cdrom
…
cgroups
cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags
2014-09-24 22:16:06 -04:00
connector
w1: optional bundling of netlink kernel replies
2014-05-27 13:56:21 -07:00
console
…
cpu-freq
intel_pstate: Update documentation of {max,min}_perf_pct sysfs files
2014-07-07 01:22:19 +02:00
cpuidle
…
cris
…
crypto
…
development-process
…
device-mapper
dm switch: efficiently support repetitive patterns
2014-08-01 12:30:37 -04:00
devicetree
rtc: bq32000: add trickle charger device tree binding
2014-10-14 02:18:18 +02:00
DocBook
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-10-13 15:51:40 +02:00
driver-model
PCI changes for the v3.18 merge window:
2014-10-09 15:03:49 -04:00
dvb
[media] get_dvb_firmware: Update firmware of ITEtech IT9135
2014-09-21 17:03:04 -03:00
early-userspace
…
EDID
drm: Add 800x600 (SVGA) screen resolution to the built-in EDIDs
2014-05-26 12:53:40 +10:00
extcon
extcon: fix switch class porting guide (Documentation)
2014-01-07 11:54:28 +09:00
fault-injection
…
fb
doc: spelling error changes
2014-05-05 15:32:05 +02:00
filesystems
autofs: the documentation I wanted to read
2014-10-14 02:18:17 +02:00
firmware_class
doc: fix minor typos in firmware_class README
2014-07-17 18:43:40 -07:00
fmc
FMC: make eeprom attribute writable
2014-02-28 15:12:08 -08:00
frv
…
gpio
This is the bulk of GPIO changes for the v3.18 development
2014-10-09 14:58:15 -04:00
hid
HID: uhid: update documentation
2014-08-25 03:28:09 -05:00
hwmon
Immutable branch between MFD, HWMON, LEDs and Watchdog for v3.18
2014-09-24 09:25:06 -07:00
i2c
Documentation: i2c: rename variable "register" to "reg"
2014-09-07 15:21:13 -07:00
i2o
…
ia64
Documentation: use subdir-y to avoid unnecessary built-in.o files
2014-09-26 11:02:55 +02:00
ide
Documentation/: update 00-INDEX files
2014-02-10 16:01:40 -08:00
infiniband
IB/mad: add new ioctl to ABI to support new registration options
2014-08-10 20:36:00 -07:00
input
Merge branch 'next' into for-linus
2014-08-06 23:36:12 -07:00
ioctl
cxl: Add documentation for userspace APIs
2014-10-08 20:16:19 +11:00
isdn
…
ja_JP
Documentation: Update stable address in Chinese and Japanese translations
2014-04-16 14:13:27 -07:00
kbuild
Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
2014-08-14 11:14:29 -06:00
kdump
Documentation/kdump/kdump.txt: add ARM description
2014-08-29 16:28:17 -07:00
ko_KR
Documentation: HOWTO: Updates on subsystem trees, patchwork, -next (vs. -mm) in ko_KR
2014-01-08 15:32:51 -08:00
laptops
Documentation: update .gitignore files
2014-09-26 11:02:59 +02:00
leds
Documentation/: update 00-INDEX files
2014-02-10 16:01:40 -08:00
locking
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-10-13 15:51:40 +02:00
m68k
Documentation/: update 00-INDEX files
2014-02-10 16:01:40 -08:00
memory-devices
…
metag
…
mic
Documentation: update include path for mpssd
2014-10-03 15:48:20 +02:00
mips
Documentation: au1xxx-ide.c has moved
2014-08-26 09:35:53 +02:00
misc-devices
Documentation: use subdir-y to avoid unnecessary built-in.o files
2014-09-26 11:02:55 +02:00
mmc
…
mn10300
…
mtd
MTD updates for 3.16:
2014-06-11 08:35:34 -07:00
namespaces
…
netlabel
…
networking
Documentation: replace __sk_run_filter with __bpf_prog_run
2014-10-10 15:10:50 -04:00
nfc
…
parisc
…
PCI
doc: replace "practise" with "practice" in Documentation
2014-06-19 15:28:56 +02:00
pcmcia
Documentation: use subdir-y to avoid unnecessary built-in.o files
2014-09-26 11:02:55 +02:00
phy
phy: Add new Exynos USB 2.0 PHY driver
2014-03-08 12:39:44 +05:30
platform
Documentation: Add list of laptop models supported by the Compal driver
2014-06-10 19:11:06 -04:00
power
Merge branch 'pm-genirq'
2014-10-07 01:17:21 +02:00
powerpc
cxl: Add documentation for userspace APIs
2014-10-08 20:16:19 +11:00
pps
…
prctl
Documentation: update .gitignore files
2014-09-26 11:02:59 +02:00
pti
…
ptp
Documentation: update .gitignore files
2014-09-26 11:02:59 +02:00
rapidio
rapidio/tsi721_dma: rework scatter-gather list handling
2014-08-08 15:57:24 -07:00
RCU
documentation: Add verbiage on RCU-tasks stall warning messages
2014-09-07 16:27:28 -07:00
s390
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next
2014-06-04 08:50:34 -07:00
scheduler
Documentation/scheduler/sched-deadline.txt: Add minimal main() appendix
2014-09-16 10:23:45 +02:00
scsi
megaraid_sas: Version and Changelog update
2014-09-16 09:09:54 -07:00
security
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2014-10-12 10:13:55 -04:00
serial
TTY/Serial driver patches for 3.18-rc1
2014-10-08 06:52:11 -04:00
sh
…
sound
ALSA: virtuoso: add Xonar Essence STX II support
2014-08-04 15:20:48 +02:00
spi
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/doc
2014-10-07 21:14:57 -04:00
sysctl
coredump: add %i/%I in core_pattern to report the tid of the crashed thread
2014-10-14 02:18:21 +02:00
target
…
thermal
drm/nouveau/doc: update the thermal documentation
2014-06-17 14:50:17 +10:00
timers
Documentation: update .gitignore files
2014-09-26 11:02:59 +02:00
tpm
…
trace
mm: trace-vmscan-postprocess.pl: report the number of file/anon pages respectively
2014-08-06 18:01:20 -07:00
usb
usb: hub: rename khubd to hub_wq in documentation and comments
2014-09-23 22:33:19 -07:00
vDSO
Documentation: disable vdso_test to avoid breakage with old glibc
2014-09-26 11:03:00 +02:00
video4linux
media updates for v3.18-rc1
2014-10-10 22:04:49 -04:00
virtual
Changes for KVM for arm/arm64 for 3.18
2014-09-27 11:03:33 +02:00
vm
mm: mark remap_file_pages() syscall as deprecated
2014-06-06 16:08:17 -07:00
w1
w1: new w1_ds2406 driver
2014-06-19 17:45:14 -07:00
watchdog
Documentation: use subdir-y to avoid unnecessary built-in.o files
2014-09-26 11:02:55 +02:00
wimax
…
x86
x86/doc: Fix the 'tlb_single_page_flush_ceiling' sysconfig path
2014-08-10 09:09:26 +02:00
xtensa
xtensa: remap io area defined in device tree
2014-01-15 00:25:14 +04:00
zh_CN
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2014-08-06 21:03:53 -07:00
00-INDEX
locking/Documentation: Move locking related docs into Documentation/locking/
2014-08-13 10:32:03 +02:00
applying-patches.txt
Documentation: change "&" to "and" in Documentation/applying-patches.txt
2014-09-26 11:10:11 +02:00
assoc_array.txt
…
atomic_ops.txt
arch,doc: Convert smp_mb__*()
2014-04-18 14:20:48 +02:00
bad_memory.txt
…
basic_profiling.txt
…
bcache.txt
…
binfmt_misc.txt
binfmt_misc: touch up documentation a bit
2014-10-14 02:18:16 +02:00
braille-console.txt
…
bt8xxgpio.txt
…
btmrvl.txt
…
BUG-HUNTING
…
bus-virt-phys-mapping.txt
…
cachetlb.txt
…
Changes
Documentation: remove obsolete pcmcia-cs from Changes
2014-09-09 10:35:58 +02:00
circular-buffers.txt
…
clk.txt
clk: Improve clk_ops documentation
2014-05-12 17:08:33 -07:00
coccinelle.txt
…
CodingStyle
CodingStyle: fix a minor typo
2014-08-26 09:35:54 +02:00
cpu-hotplug.txt
Doc/cpu-hotplug: Specify race-free way to register CPU hotplug callbacks
2014-03-20 13:43:40 +01:00
cpu-load.txt
…
cputopology.txt
…
crc32.txt
…
dcdbas.txt
…
debugging-modules.txt
…
debugging-via-ohci1394.txt
firewire: revert to 4 GB RDMA, fix protocols using Memory Space
2014-05-29 15:50:30 +02:00
dell_rbu.txt
…
devices.txt
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
2014-04-04 09:50:07 -07:00
digsig.txt
…
DMA-API-HOWTO.txt
Documentation: correct parameter error for dma_mapping_error
2014-09-26 11:22:29 +02:00
DMA-API.txt
DMA-API: Capitalize "CPU" consistently
2014-05-26 17:28:27 -06:00
DMA-attributes.txt
doc: spelling error changes
2014-05-05 15:32:05 +02:00
dma-buf-sharing.txt
Documentation/dma-buf-sharing.txt: update API descriptions
2014-08-28 11:57:24 +05:30
DMA-ISA-LPC.txt
DMA-API: Clarify physical/bus address distinction
2014-05-20 16:54:21 -06:00
dmaengine.txt
dmaengine: Clarify device parameter for dma_sync_*_for_*()
2014-07-25 14:21:23 +05:30
dmatest.txt
…
dontdiff
Documentation: LLVMLinux: Update Documentation/dontdiff
2014-04-09 13:44:34 -07:00
dynamic-debug-howto.txt
doc: spelling error changes
2014-05-05 15:32:05 +02:00
edac.txt
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next
2014-06-04 08:50:34 -07:00
efi-stub.txt
doc: arm64: add description of EFI stub support
2014-04-30 19:57:05 +01:00
eisa.txt
…
email-clients.txt
Documentation: add section about git to email-clients.txt
2014-06-29 13:38:33 -07:00
flexible-arrays.txt
…
futex-requeue-pi.txt
doc: fix double words
2014-03-21 13:16:58 +01:00
gcov.txt
…
highuid.txt
…
HOWTO
…
hsi.txt
Documentation: HSI: Add some general description for the HSI subsystem
2014-05-04 09:49:46 +02:00
hw_random.txt
…
hwspinlock.txt
…
init.txt
…
initrd.txt
…
intel_txt.txt
…
Intel-IOMMU.txt
…
io_ordering.txt
…
io-mapping.txt
…
iostats.txt
…
IPMI.txt
…
IRQ-affinity.txt
…
IRQ-domain.txt
genirq: Improve documentation to match current implementation
2014-05-27 10:16:44 +02:00
IRQ.txt
…
irqflags-tracing.txt
asm/system.h: clean asm/system.h from docs
2014-04-07 16:36:11 -07:00
isapnp.txt
…
java.txt
Documentation: update java sample wrapper for java 7
2014-05-25 12:39:00 -07:00
kernel-doc-nano-HOWTO.txt
…
kernel-docs.txt
…
kernel-parameters.txt
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-10-13 15:44:12 +02:00
kernel-per-CPU-kthreads.txt
Documentation/kernel-per-CPU-kthreads.txt: Workqueue affinity
2014-02-17 14:56:08 -08:00
kmemcheck.txt
doc: fix double words
2014-03-21 13:16:58 +01:00
kmemleak.txt
Documentation: kmemleak: correct spelling mistake
2014-08-26 09:35:53 +02:00
kobject.txt
…
kprobes.txt
kprobes: Introduce NOKPROBE_SYMBOL() macro to maintain kprobes blacklist
2014-04-24 10:02:56 +02:00
kref.txt
…
ldm.txt
…
local_ops.txt
…
lockup-watchdogs.txt
lockup-watchdogs: Fix a typo
2014-08-26 09:35:52 +02:00
logo.gif
…
logo.txt
…
lzo.txt
Documentation: lzo: document part of the encoding
2014-09-28 11:08:00 +02:00
magic-number.txt
Documentation/serial: Delete obsolete driver documentation
2014-04-16 14:20:34 -07:00
Makefile
Documentation: add makefiles for more targets
2014-09-26 11:02:56 +02:00
ManagementStyle
…
md.txt
…
media-framework.txt
…
memory-barriers.txt
memory-barriers: Fix description of 2-legged-if-based control dependencies
2014-09-07 16:15:53 -07:00
memory-hotplug.txt
memory-hotplug: add sysfs valid_zones attribute
2014-10-09 22:25:52 -04:00
module-signing.txt
Nothing major: the stricter permissions checking for sysfs broke
2014-04-06 09:38:07 -07:00
mono.txt
…
nommu-mmap.txt
…
numastat.txt
…
oops-tracing.txt
panic: add TAINT_SOFTLOCKUP
2014-08-08 15:57:24 -07:00
padata.txt
…
parport-lowlevel.txt
…
parport.txt
…
percpu-rw-semaphore.txt
…
phy.txt
phy: core: Let node ptr of PHY point to PHY and not of PHY provider
2014-07-22 12:46:11 +05:30
pi-futex.txt
…
pinctrl.txt
pinctrl: clean up after enable refactoring
2014-09-04 10:05:07 +02:00
pnp.txt
…
preempt-locking.txt
…
printk-formats.txt
lib/vsprintf: add %*pE[achnops] format specifier
2014-10-14 02:18:26 +02:00
pwm.txt
pwm: modify PWM_LOOKUP to initialize all struct pwm_lookup members
2014-05-21 11:19:36 +02:00
ramoops.txt
…
rbtree.txt
doc: spelling error changes
2014-05-05 15:32:05 +02:00
remoteproc.txt
…
rfkill.txt
doc: spelling error changes
2014-05-05 15:32:05 +02:00
robust-futex-ABI.txt
…
robust-futexes.txt
doc: spelling error changes
2014-05-05 15:32:05 +02:00
rpmsg.txt
…
rtc.txt
…
SAK.txt
…
SecurityBugs
…
serial-console.txt
…
sgi-ioc4.txt
…
SM501.txt
…
smsc_ece1099.txt
…
sparse.txt
…
stable_api_nonsense.txt
…
stable_kernel_rules.txt
stable_kernel_rules: Add pointer to netdev-FAQ for network patches
2014-07-09 15:54:27 -07:00
static-keys.txt
…
SubmitChecklist
…
SubmittingDrivers
doc: SubmittingPatches: remove dead link, kerneltrap.org no longer works
2014-06-19 15:15:27 +02:00
SubmittingPatches
Documentation: new page link in SubmittingPatches
2014-09-07 15:21:13 -07:00
svga.txt
…
sysfs-rules.txt
Documentation/sysfs-rules.txt: Add device attribute error code documentation
2014-09-19 14:44:51 -07:00
sysrq.txt
…
this_cpu_ops.txt
Docs: this_cpu_ops: remove redundant add forms
2014-09-26 11:03:00 +02:00
unaligned-memory-access.txt
…
unicode.txt
…
unshare.txt
…
vfio.txt
drivers/vfio: EEH support for VFIO PCI device
2014-08-05 15:28:48 +10:00
VGA-softcursor.txt
…
vgaarbiter.txt
…
video-output.txt
…
vme_api.txt
…
volatile-considered-harmful.txt
…
workqueue.txt
…
xillybus.txt
xillybus: Move out of staging
2014-09-23 23:44:16 -07:00
xz.txt
…
zorro.txt
…