Tina Ruchandani
85cf955df8
aoe: use ktime_t instead of timeval ...
'struct frame' uses two variables to store the sent timestamp - 'struct
timeval' and jiffies. jiffies is used to avoid discrepancies caused by
updates to system time. 'struct timeval' is deprecated because it uses
32-bit representation for seconds which will overflow in year 2038.
This patch does the following:
- Replace the use of 'struct timeval' and jiffies with ktime_t, which
is the recommended type for timestamping
- ktime_t provides both long range (like jiffies) and high resolution
(like timeval). Using ktime_get (monotonic time) instead of wall-clock
time prevents any discprepancies caused by updates to system time.
[updates by Arnd below]
The original patch from Tina never went anywhere as we discussed how
to keep the impact on performance minimal. I've started over now but
arrived at basically the same patch that she had originally, except for
an slightly improved tsince_hr() function. I'm making it more robust
against overflows, and also optimize explicitly for the common case
in which a frame is less than 4.2 seconds old, using only a 32-bit
division in that case.
This should make the new version more efficient than the old code,
since we replace the existing two 32-bit division in do_gettimeofday()
plus one multiplication with a single single 32-bit division in
tsince_hr() and drop the double bookkeeping. It's also more efficient
than the ktime_get_us() API we discussed before, since that would
also rely on multiple divisions.
Link: https://lists.linaro.org/pipermail/y2038/2015-May/000276.html
Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
Cc: Ed Cashin <ed.cashin@acm.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-01-17 08:41:07 -07:00
PM / sleep: Avoid excess pm_runtime_enable() calls in device_resume()
2017-12-11 14:32:56 +01:00
A couple of dma-mapping updates:
2017-11-14 16:54:12 -08:00
ANDROID: binder: fix transaction leak.
2017-11-28 16:54:45 +01:00
libata: sata_down_spd_limit should return if driver has not recorded sstatus speed
2017-12-04 13:57:03 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-11-29 13:10:25 -08:00
auxdisplay: img-ascii-lcd: Only build on archs that have IOMEM
2017-11-27 12:36:45 -08:00
PM / sleep: Avoid excess pm_runtime_enable() calls in device_resume()
2017-12-11 14:32:56 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-11-15 11:56:19 -08:00
aoe: use ktime_t instead of timeval
2018-01-17 08:41:07 -07:00
bus: arm-ccn: fix module unloading Error: Removing state 147 which has instances left.
2017-12-04 17:15:20 +00:00
Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
2017-11-14 15:32:19 -08:00
The big changes for IPMI that just went in had a few problems. These
2017-12-11 17:01:59 -08:00
We have two changes to the core framework this time around. The first being a
2017-11-17 20:04:24 -08:00
- final batch of "non trivial" timer conversions (multi-tree dependencies,
2017-11-23 16:29:05 +01:00
cpufreq: mediatek: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE
2017-11-22 00:00:14 +01:00
powerpc updates for 4.15
2017-11-16 12:47:46 -08:00
powerpc updates for 4.15
2017-11-16 12:47:46 -08:00
device-dax: implement ->split() to catch invalid munmap attempts
2017-11-29 18:40:42 -08:00
Merge branches 'pm-devfreq' and 'pm-tools'
2017-11-13 01:41:39 +01:00
dmaengine: fsl-edma: disable clks on all error paths
2017-12-15 09:53:04 +05:30
Tracing updates for 4.15:
2017-11-17 14:58:01 -08:00
Modules updates for v4.15
2017-11-15 13:46:33 -08:00
USB/PHY patches for 4.15-rc1
2017-11-13 21:14:07 -08:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 17:56:58 -08:00
ARM: SoC fixes for 4.15-rc
2017-12-10 08:26:59 -08:00
Char/Misc patches for 4.15-rc1
2017-11-16 09:10:59 -08:00
gpio: pca953x: fix vendor prefix for PCA9654
2017-12-02 22:41:43 +01:00
Merge branch 'akpm' (patches from Andrew)
2017-12-14 16:35:20 -08:00
treewide: setup_timer() -> timer_setup()
2017-11-21 15:57:07 -08:00
HSI changes for the v4.15 series
2017-11-15 13:35:43 -08:00
Drivers: hv: vmbus: Fix a rescind issue
2017-11-28 16:56:26 +01:00
hwmon: (jc42) optionally try to disable the SMBUS timeout
2017-11-30 13:12:44 -08:00
hwspinlock update for v4.15
2017-11-17 20:16:20 -08:00
tracing: Pass export pointer as argument to ->write()
2017-12-04 07:14:30 -05:00
i2c: piix4: Fix port number check on release
2017-12-12 23:27:04 +01:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide
2017-11-19 08:04:41 -10:00
Merge branch 'pm-cpuidle'
2017-11-13 01:34:14 +01:00
iio: health: max30102: Temperature should be in milli Celsius
2017-12-02 11:15:14 +00:00
Second pull request for 4.15-rc
2017-12-16 13:43:08 -08:00
treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts
2017-11-21 16:35:54 -08:00
IOMMU fixes for Linux v4.15-rc3
2017-12-06 10:53:02 -08:00
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-26 14:39:20 -08:00
treewide: setup_timer() -> timer_setup() (2 field)
2017-11-21 15:57:09 -08:00
LED updates for 4.15rc1
2017-11-14 18:09:31 -08:00
lightnvm: pblk: refactor pblk_ppa_comp function
2018-01-05 08:50:12 -07:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 17:56:58 -08:00
Change to POLL api and fixes for FlexRM and OMAP driver
2017-11-15 13:39:18 -08:00
dm: fix incomplete request_queue initialization
2018-01-15 08:54:32 -07:00
media fixes for v4.15-rc3
2017-12-08 13:18:47 -08:00
ARM: SoC driver updates for v4.15
2017-11-16 16:05:01 -08:00
treewide: setup_timer() -> timer_setup()
2017-11-21 15:57:07 -08:00
Modules updates for v4.15
2017-11-15 13:46:33 -08:00
treewide: setup_timer() -> timer_setup()
2017-11-21 15:57:07 -08:00
Merge branch 'WIP.x86-pti.base.prep-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-12-17 13:54:31 -08:00
mmc: core: apply NO_CMD23 quirk to some specific cards
2017-12-11 13:43:27 +01:00
Rename superblock flags (MS_xyz -> SB_xyz)
2017-11-27 13:05:09 -08:00
net: qcom/emac: Reduce timeout for mdio read/write
2017-12-15 15:46:19 -05:00
treewide: setup_timer() -> timer_setup() (2 field)
2017-11-21 15:57:09 -08:00
treewide: setup_timer() -> timer_setup()
2017-11-21 15:57:07 -08:00
m68k updates for 4.15
2017-11-13 12:10:24 -08:00
libnvdimm for 4.15
2017-11-17 09:51:57 -08:00
nvme/multipath: Use blk_path_error
2018-01-10 10:52:18 -07:00
Char/Misc patches for 4.15-rc1
2017-11-16 09:10:59 -08:00
of_mdio / mdiobus: ensure mdio devices have fwnode correctly populated
2017-12-13 15:01:47 -05:00
Char/Misc patches for 4.15-rc1
2017-11-16 09:10:59 -08:00
Power management fix for v4.15-rc4
2017-12-14 18:25:03 -08:00
drivers/pcmcia/sa1111_badge4.c: avoid unused function warning
2017-11-17 16:10:04 -08:00
arm64 updates for 4.15
2017-11-15 10:56:56 -08:00
USB/PHY patches for 4.15-rc1
2017-11-13 21:14:07 -08:00
pinctrl: sunxi: Disable strict mode for H5 driver
2017-11-30 16:50:43 +01:00
platform/x86: dell-wmi: check for kmalloc() errors
2017-12-11 17:26:03 -08:00
power supply and reset changes for the v4.15 series
2017-11-15 13:37:15 -08:00
treewide: setup_timer() -> timer_setup()
2017-11-21 15:57:07 -08:00
xen: features and fixes for v4.15-rc1
2017-11-16 13:06:27 -08:00
pwm: Changes for v4.15-rc1
2017-11-22 21:09:18 -10:00
Merge branch 'akpm' (patches from Andrew)
2017-11-17 16:56:17 -08:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 17:56:58 -08:00
- New Drivers
2017-11-16 09:15:57 -08:00
remoteproc updates for v4.15
2017-11-17 20:14:10 -08:00
ARM: SoC driver updates for v4.15
2017-11-16 16:05:01 -08:00
rpmsg updates for v4.15
2017-11-17 20:12:08 -08:00
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-25 08:37:16 -10:00
s390/qeth: update takeover IPs after configuration change
2017-12-15 11:29:43 -05:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
2017-11-17 20:21:44 -08:00
SCSI fixes on 20171215
2017-12-15 12:51:42 -08:00
A couple of dma-mapping updates:
2017-11-14 16:54:12 -08:00
meson-gx-socinfo: Fix package id parsing
2017-11-30 15:29:44 -08:00
Merge tag 'staging-4.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
2017-12-15 12:59:48 -08:00
target: Use sgl_alloc_order() and sgl_free()
2018-01-06 09:18:00 -07:00
optee: fix invalid of_node_put() in optee_driver_init()
2017-11-29 10:24:57 +01:00
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
2017-11-17 14:31:27 -08:00
Char/Misc patches for 4.15-rc1
2017-11-16 09:10:59 -08:00
serdev: ttyport: fix tty locking in close
2017-11-28 16:00:50 +01:00
USB: core: prevent malicious bNumInterfaces overflow
2017-12-13 12:28:43 +01:00
treewide: setup_timer() -> timer_setup()
2017-11-21 15:57:07 -08:00
VFIO Updates for Linux v4.15
2017-11-14 16:47:47 -08:00
vhost: fix skb leak in handle_rx()
2017-12-02 21:31:03 -05:00
fbdev changes for v4.15:
2017-11-20 21:50:24 -10:00
virtio_mmio: fix devm cleanup
2017-12-14 21:01:40 +02:00
Char/Misc patches for 4.15-rc1
2017-11-16 09:10:59 -08:00
Char/Misc patches for 4.15-rc1
2017-11-16 09:10:59 -08:00
treewide: setup_timer() -> timer_setup()
2017-11-21 15:57:07 -08:00
xen: fixes for 4.15-rc4
2017-12-15 11:32:09 -08:00
Merge branches 'pm-cpufreq-sched' and 'pm-opp'
2017-11-13 01:40:52 +01:00
usb: build drivers/usb/common/ when USB_SUPPORT is set
2017-11-28 15:17:49 +01:00
85cf955df8