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Christopher James Halse Rogers 19e8697ba4 dma-buf: Expose buffer size to userspace (v2) 
Each dma-buf has an associated size and it's reasonable for userspace
to want to know what it is.

Since userspace already has an fd, expose the size using the
size = lseek(fd, SEEK_END, 0); lseek(fd, SEEK_CUR, 0);
idiom.

v2: Added Daniel's sugeested documentation, with minor fixups

Signed-off-by: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Tested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
2013-09-10 11:36:45 +05:30
..
ABI
Merge tag 'for-linus-20130909' of git://git.infradead.org/linux-mtd
2013-09-09 10:33:19 -07:00
accounting
Documentation/accounting/getdelays.c: avoid strncpy in accounting tool
2013-07-03 16:08:06 -07:00
acpi
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
aoe
aoe: allow user to disable target failure timeout
2012-12-17 17:15:25 -08:00
arm
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
arm64
Documentation/arm64: clarify requirements for DTB placement
2013-09-05 17:29:05 +01:00
auxdisplay
…
backlight
backlight: lp855x: remove duplicate platform data
2013-04-29 18:28:19 -07:00
blackfin
…
block
doc: Fix typo in doucmentations
2013-07-25 12:34:15 +02:00
blockdev
nbd: update documentation and link to mailinglist
2013-02-27 19:10:22 -08:00
bus-devices
ARM: OMAP2+: gpmc: generic timing calculation
2012-11-09 18:07:11 +05:30
cdrom
…
cgroups
Merge branch 'for-3.11/core' of git://git.kernel.dk/linux-block
2013-07-11 13:03:24 -07:00
connector
…
console
TTY:console: update document console.txt
2013-05-21 10:21:57 -07:00
cpu-freq
cpufreq: Drop the owner field from struct cpufreq_driver
2013-08-10 03:24:47 +02:00
cpuidle
cpuidle: make a single register function for all
2013-04-23 13:45:22 +02:00
cris
…
crypto
drivers/dma: remove unused support for MEMSET operations
2013-07-03 16:07:42 -07:00
development-process
Documentation: development-process: Update -mm and -next URLs
2013-07-25 12:37:24 +02:00
device-mapper
Merge tag 'dm-3.11-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/agk/linux-dm
2013-07-11 13:05:40 -07:00
devicetree
Merge tag 'clk-for-linus-3.12' of git://git.linaro.org/people/mturquette/linux
2013-09-09 15:49:04 -07:00
DocBook
Merge tag 'for-linus-20130909' of git://git.infradead.org/linux-mtd
2013-09-09 10:33:19 -07:00
driver-model
Documentation: devres: add IIO device alloc/free functions to list
2013-08-20 12:57:55 +02:00
dvb
[media] get_dvb_firmware: Fix the location of firmware for Terratec HTC
2013-01-01 11:18:26 -02:00
early-userspace
Documentation: remove reference to 2.7 kernel in early-userspace
2013-08-20 12:47:28 +02:00
EDID
drm: Add 1600x1200 (UXGA) screen resolution to the built-in EDIDs
2013-04-12 14:06:16 +10:00
extcon
…
fault-injection
doc: fix quite a few typos within Documentation
2012-11-19 14:28:24 +01:00
fb
Documentation/fb/viafb.modes fix a typo
2013-08-20 12:41:11 +02:00
filesystems
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2013-09-09 09:13:22 -07:00
firmware_class
firmware loader: document firmware cache mechanism
2012-11-14 15:07:18 -08:00
fmc
doc: Fix typo "is is" in Documentations
2013-08-27 10:50:52 +02:00
frv
…
hid
HID: uhid: use generic hidinput_input_event()
2013-07-31 10:33:05 +02:00
hwmon
Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
2013-09-07 10:54:19 -07:00
i2c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
i2o
…
ia64
Fix example error_injection_tool
2013-04-02 09:39:55 -07:00
ide
…
infiniband
IB/ipoib: Add rtnl_link_ops support
2012-09-20 16:49:17 -04:00
input
Merge branch 'master' into for-3.12/upstream
2013-09-04 10:49:57 +02:00
ioctl
s390/sclp: Add SCLP character device driver
2013-06-26 21:10:13 +02:00
isdn
…
ja_JP
HOWTO ja_JP sync
2013-07-24 22:06:34 -07:00
kbuild
Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
2013-07-10 16:06:46 -07:00
kdump
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-07-04 11:40:58 -07:00
ko_KR
Correct unfaithful translation on HOWTO in ko_KR
2013-08-12 17:43:13 -07:00
laptops
platform / thinkpad: Remove deprecated hotkey_report_mode parameter
2013-07-15 13:57:00 +02:00
leds
Documentation: leds: Fix a typo
2013-08-20 12:51:29 +02:00
m68k
block: remove refs to XD disks from documentation
2013-05-17 15:17:12 +02:00
make
…
memory-devices
…
metag
doc: fix misspellings with 'codespell' tool
2013-05-28 12:02:12 +02:00
mips
…
misc-devices
doc: fix misspellings with 'codespell' tool
2013-05-28 12:02:12 +02:00
mmc
mmc: core: Add in support to expose PRV for v4 MMCs
2013-03-22 12:10:42 -04:00
mn10300
…
mtd
doc: Fix typo "is is" in Documentations
2013-08-27 10:50:52 +02:00
namespaces
userns: Recommend use of memory control groups.
2013-01-26 22:20:06 -08:00
netlabel
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networking
net: ipv6: mld: document force_mld_version in ip-sysctl.txt
2013-09-04 14:53:21 -04:00
nfc
NFC: Update pn544 documentation
2013-01-10 01:27:46 +01:00
parisc
parisc: document the shadow registers
2013-07-09 22:09:19 +02:00
PCI
PCI/MSI: Enable multiple MSIs with pci_enable_msi_block_auto()
2013-01-24 17:25:13 +01:00
pcmcia
…
power
power: Documentation: Update s2ram link
2013-08-27 10:54:52 +02:00
powerpc
powerpc: Update the 00-Index in Documentation/powerpc
2013-08-27 14:44:27 +10:00
pps
…
prctl
seccomp: Make syscall skipping and nr changes more consistent
2012-10-02 21:14:29 +10:00
pti
…
ptp
…
rapidio
doc: Fix typo in doucmentations
2013-07-25 12:34:15 +02:00
RCU
Merge branches 'doc.2013.08.19a', 'fixes.2013.08.20a', 'sysidle.2013.08.31a' and 'torture.2013.08.20a' into HEAD
2013-08-31 14:44:45 -07:00
s390
s390/cio: add condev keyword to cio_ignore
2013-05-02 15:50:20 +02:00
scheduler
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
scsi
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
security
Smack: add support for modification of existing rules
2013-03-19 14:16:42 -07:00
serial
stallion: final cleanup
2013-06-03 14:31:39 -07:00
sh
…
sound
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
spi
spi/documentation: Fix usage of __initdata
2013-08-20 12:52:28 +02:00
sysctl
qdisc: allow setting default queuing discipline
2013-08-31 00:32:32 -04:00
target
Documentation: replace strict_strtoul() with kstrtoul()
2013-08-20 12:56:26 +02:00
thermal
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
2013-07-11 12:26:08 -07:00
timers
nohz_full: Add testing information to documentation
2013-08-18 18:06:55 -07:00
tpm
drivers/tpm: add xen tpmfront interface
2013-08-09 10:57:06 -04:00
trace
Documentation/trace: Correcting and extending tracepoint documentation
2013-08-27 10:57:11 +02:00
usb
proc_usb_info.txt: Correct documentation about endianness of config descriptors
2013-08-12 12:24:27 -07:00
vDSO
…
video4linux
[media] V4L: Add support for integer menu controls with standard menu items
2013-08-18 07:12:59 -03:00
virtual
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
vm
zswap: add documentation
2013-07-10 18:11:34 -07:00
w1
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-07-04 11:40:58 -07:00
watchdog
watchdog: delete mpcore_wdt driver
2013-07-11 21:47:58 +02:00
wimax
…
x86
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
xtensa
xtensa: document MMUv3 setup sequence
2013-05-09 01:07:09 -07:00
zh_CN
Documentation/zh_CN/SubmittingPatches fix a typo
2013-08-20 12:41:25 +02:00
.gitignore
…
00-INDEX
doc: fix a typo in Documentation/00-INDEX
2013-08-27 10:53:07 +02:00
applying-patches.txt
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atomic_ops.txt
Documentation: Memory barrier semantics of atomic_xchg()
2013-01-08 14:14:55 -08:00
bad_memory.txt
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basic_profiling.txt
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bcache.txt
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-07-04 11:40:58 -07:00
binfmt_misc.txt
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braille-console.txt
…
bt8xxgpio.txt
…
btmrvl.txt
…
BUG-HUNTING
…
bus-virt-phys-mapping.txt
…
cachetlb.txt
Documentation: fix typo and update version in cachetlb.txt
2013-08-20 12:46:52 +02:00
Changes
…
circular-buffers.txt
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clk.txt
clk: add support for clock reparent on set_rate
2013-08-19 12:27:17 -07:00
coccinelle.txt
Coccinelle: Update information about the minimal version required
2013-07-03 22:58:20 +02:00
CodingStyle
Documentation/CodingStyle: allow multiple return statements per function
2013-07-03 16:08:01 -07:00
cpu-hotplug.txt
kernel: delete __cpuinit usage from all core kernel files
2013-07-14 19:36:59 -04:00
cpu-load.txt
…
cputopology.txt
doc: Documentation/cputopology.txt fix typo
2013-09-04 12:59:47 +02:00
crc32.txt
…
dcdbas.txt
…
debugging-modules.txt
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debugging-via-ohci1394.txt
…
dell_rbu.txt
…
devices.txt
/dev/oldmem: Remove the interface
2013-07-03 16:08:03 -07:00
digsig.txt
…
DMA-API-HOWTO.txt
Documentation/DMA-API-HOWTO.txt: fix typo
2013-02-27 19:10:23 -08:00
DMA-API.txt
dma-debug: New interfaces to debug dma mapping errors
2012-10-24 17:06:43 +02:00
DMA-attributes.txt
common: DMA-mapping: add DMA_ATTR_FORCE_CONTIGUOUS attribute
2012-11-29 03:30:34 -08:00
dma-buf-sharing.txt
dma-buf: Expose buffer size to userspace (v2)
2013-09-10 11:36:45 +05:30
DMA-ISA-LPC.txt
…
dmaengine.txt
…
dmatest.txt
dmatest: make module parameters writable
2013-08-22 22:57:32 -07:00
dontdiff
x86: remove offsets.h from .gitignore and dontdiff
2012-11-19 14:10:53 +01:00
dynamic-debug-howto.txt
doc: fix misspellings with 'codespell' tool
2013-05-28 12:02:12 +02:00
edac.txt
Merge branch 'devel'
2012-07-29 21:11:05 -03:00
eisa.txt
…
email-clients.txt
…
flexible-arrays.txt
…
futex-requeue-pi.txt
…
gcov.txt
…
gpio.txt
Remove GENERIC_GPIO config option
2013-04-16 18:47:19 +09:00
highuid.txt
…
HOWTO
Documentation: Updated broken link in HOWTO
2013-06-03 14:22:57 -07:00
hw_random.txt
hwrng: Fix a wrong comment in Documentation/hw_random.txt
2013-03-10 18:16:36 +08:00
hwspinlock.txt
doc: documentation/hwspinlock.txt fix typo
2013-08-27 10:46:02 +02:00
init.txt
…
initrd.txt
…
intel_txt.txt
Documentation: remove depends on CONFIG_EXPERIMENTAL
2013-01-11 11:38:03 -08:00
Intel-IOMMU.txt
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io_ordering.txt
…
io-mapping.txt
…
iostats.txt
iostats.txt: add easy-to-find description for field 6
2013-04-29 15:18:50 +02:00
IPMI.txt
ipmi: add options to disable openfirmware and PCI scanning
2013-02-27 19:10:21 -08:00
IRQ-affinity.txt
doc: fix a typo about irq affinity
2013-08-20 12:59:18 +02:00
IRQ-domain.txt
irqdomain: update documentation
2012-12-05 23:52:10 +00:00
IRQ.txt
…
irqflags-tracing.txt
…
isapnp.txt
…
java.txt
…
kernel-doc-nano-HOWTO.txt
kernel-doc: Update references to SGML to refs to XML instead.
2013-05-28 12:02:11 +02:00
kernel-docs.txt
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kernel-parameters.txt
Merge tag 'nfs-for-3.12-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
2013-09-09 09:19:15 -07:00
kernel-per-CPU-kthreads.txt
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-07-04 11:40:58 -07:00
kmemcheck.txt
Documentation/kmemcheck: update kmemcheck documentation
2013-08-27 10:47:05 +02:00
kmemleak.txt
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kobject.txt
Documentation: Fix "struct kobj_type" to include newer members.
2012-09-04 16:06:34 -07:00
kprobes.txt
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kref.txt
kref: Add kref_get_unless_zero documentation
2012-11-28 18:36:06 +10:00
ldm.txt
…
local_ops.txt
…
lockdep-design.txt
…
lockstat.txt
locking/stat: Fix a typo
2013-02-19 08:42:37 +01:00
lockup-watchdogs.txt
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logo.gif
…
logo.txt
…
magic-number.txt
wanrouter: completely decouple obsolete code from kernel.
2013-01-31 19:20:33 -05:00
Makefile
…
ManagementStyle
…
md.txt
md: remove doubled description for sync_max, merging it within sync_min/sync_max
2013-07-03 09:43:28 +10:00
media-framework.txt
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
2013-07-13 12:09:57 -07:00
memory-barriers.txt
doc: Fix memory-barrier control-dependency example
2013-08-19 21:39:42 -07:00
memory-hotplug.txt
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
mono.txt
…
mutex-design.txt
…
nommu-mmap.txt
…
numastat.txt
…
oops-tracing.txt
…
padata.txt
…
parport-lowlevel.txt
…
parport.txt
…
percpu-rw-semaphore.txt
percpu-rw-semaphore: fix documentation typos
2012-09-26 19:56:15 +02:00
pi-futex.txt
…
pinctrl.txt
Documentation: pinctrl: Fix example code for pinctrl_register
2013-08-23 08:56:28 +02:00
pnp.txt
…
preempt-locking.txt
…
printk-formats.txt
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-09-06 09:36:28 -07:00
pwm.txt
pwm: Add sysfs interface
2013-06-21 11:32:51 +02:00
ramoops.txt
pstore/ftrace: Convert to its own enable/disable debugfs knob
2012-09-06 22:16:58 -07:00
rbtree.txt
rbtree: move augmented rbtree functionality to rbtree_augmented.h
2012-10-09 16:22:40 +09:00
remoteproc.txt
remoteproc: add rproc_report_crash function to notify rproc crashes
2012-09-18 12:53:22 +03:00
rfkill.txt
…
robust-futex-ABI.txt
…
robust-futexes.txt
…
rpmsg.txt
Documentation: remove __dev* attributes.
2013-01-03 15:57:16 -08:00
rt-mutex-design.txt
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
rt-mutex.txt
…
rtc.txt
rtc: add ability to push out an existing wakealarm using sysfs
2013-07-03 16:07:54 -07:00
SAK.txt
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SecurityBugs
…
serial-console.txt
…
sgi-ioc4.txt
…
sgi-visws.txt
…
SM501.txt
…
smsc_ece1099.txt
mfd: smsc: Add support for smsc gpio io/keypad driver
2012-10-01 15:27:48 +02:00
sparse.txt
Documentation/sparse.txt: document context annotations for lock checking
2012-12-17 17:15:23 -08:00
spinlocks.txt
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
stable_api_nonsense.txt
…
stable_kernel_rules.txt
…
static-keys.txt
…
SubmitChecklist
Finally eradicate CONFIG_HOTPLUG
2013-06-03 14:20:18 -07:00
SubmittingDrivers
…
SubmittingPatches
Documentation/SubmittingPatches: Request summaries for commit references
2013-08-20 12:58:15 +02:00
svga.txt
…
sysfs-rules.txt
doc: Fix typo in doucmentations
2013-07-25 12:34:15 +02:00
sysrq.txt
Documentation/sysrq: fix inconstistent help message of sysrq key
2013-04-30 17:04:10 -07:00
this_cpu_ops.txt
percpu: add documentation on this_cpu operations
2013-04-04 10:24:53 -07:00
unaligned-memory-access.txt
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unicode.txt
…
unshare.txt
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vfio.txt
vfio: fix documentation
2013-09-05 16:36:21 -06:00
VGA-softcursor.txt
…
vgaarbiter.txt
…
video-output.txt
…
vme_api.txt
…
volatile-considered-harmful.txt
…
workqueue.txt
workqueue: Correct/Drop references to gcwq in Documentation
2013-08-21 10:32:09 -04:00
ww-mutex-design.txt
mutex: Add support for wound/wait style locks
2013-06-26 12:10:56 +02:00
xz.txt
…
zorro.txt
…