Dan Williams dee4107924 /dev/dax, core: file operations and dax-mmap ... The "Device DAX" core enables dax mappings of performance / feature differentiated memory. An open mapping or file handle keeps the backing struct device live, but new mappings are only possible while the device is enabled. Faults are handled under rcu_read_lock to synchronize with the enabled state of the device. Similar to the filesystem-dax case the backing memory may optionally have struct page entries. However, unlike fs-dax there is no support for private mappings, or mappings that are not backed by media (see use of zero-page in fs-dax). Mappings are always guaranteed to match the alignment of the dax_region. If the dax_region is configured to have a 2MB alignment, all mappings are guaranteed to be backed by a pmd entry. Contrast this determinism with the fs-dax case where pmd mappings are opportunistic. If userspace attempts to force a misaligned mapping, the driver will fail the mmap attempt. See dax_dev_check_vma() for other scenarios that are rejected, like MAP_PRIVATE mappings. Cc: Hannes Reinecke <hare@suse.de> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Acked-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2016-05-20 22:02:55 -07:00
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accessibility	…
acpi	Merge branch 'acpi-processor'	2016-04-02 01:17:36 +02:00
amba	…
android	…
ata	Merge branch 'for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata	2016-03-18 20:06:46 -07:00
atm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2016-03-17 21:38:27 -07:00
auxdisplay	…
base	PM / wakeirq: fix wakeirq setting after wakup re-configuration from sysfs	2016-04-07 22:23:47 +02:00
bcma	…
block	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2016-04-15 15:44:10 -07:00
bluetooth	…
bus	mvebu fixes for 4.6 (part 1)	2016-04-12 12:35:07 -07:00
cdrom	…
char	hwrng: bcm63xx - fix device tree compilation	2016-04-05 20:23:11 +08:00
clk	clk: qcom: ipq4019: add some fixed clocks for ddrppl and fepll	2016-03-29 16:31:16 -07:00
clocksource	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-03-24 10:32:42 -07:00
connector	…
cpufreq	Merge branches 'pm-cpufreq', 'pm-cpuidle' and 'acpi-cppc'	2016-04-08 21:46:05 +02:00
cpuidle	cpuidle: menu: Fall back to polling if next timer event is near	2016-03-21 15:50:28 +01:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2016-03-23 06:12:39 -07:00
dax	/dev/dax, core: file operations and dax-mmap	2016-05-20 22:02:55 -07:00
dca	…
devfreq	…
dio	…
dma	Merge branch 'fix/edma' into fixes	2016-04-16 22:52:03 +05:30
dma-buf	dma-buf: Update docs for SYNC ioctl	2016-03-21 09:26:45 +01:00
edac	…
eisa	…
extcon	extcon: palmas: Drop stray IRQF_EARLY_RESUME flag	2016-04-04 08:32:45 +09:00
firewire	IEEE 1394 subsystem patch:	2016-03-25 08:52:25 -07:00
firmware	Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-04-16 15:37:05 -07:00
fmc	…
fpga	…
gpio	gpio: pca953x: Use correct u16 value for register word write	2016-04-08 11:49:47 +02:00
gpu	Merge branch 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes	2016-04-14 13:06:19 +10:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid	2016-04-11 12:31:09 -07:00
hsi	…
hv	Char/Misc patches for 4.6-rc1	2016-03-17 13:47:50 -07:00
hwmon	hwmon: (max1111) Return -ENODEV from max1111_read_channel if not instantiated	2016-03-27 10:37:48 -07:00
hwspinlock	…
hwtracing	…
i2c	i2c: jz4780: really prevent potential division by zero	2016-04-09 08:36:44 +02:00
ide	ide: palm_bk3710: test clock rate to avoid division by 0	2016-03-20 16:59:27 -04:00
idle	intel_idle: Add KBL support	2016-04-07 22:11:08 +02:00
iio	Second set of IIO fixes for the 4.6 cycle.	2016-04-04 13:45:10 -07:00
infiniband	Revert "ib_srpt: Convert to percpu_ida tag allocation"	2016-04-07 18:16:20 -07:00
input	Merge branch 'akpm' (patches from Andrew)	2016-03-25 16:59:11 -07:00
iommu	iommu/vt-d: Silence an uninitialized variable warning	2016-04-07 14:51:47 +02:00
ipack	…
irqchip	irqchip/mbigen: Make CONFIG_HISILICON_IRQ_MBIGEN a hidden option	2016-03-23 12:02:29 +01:00
isdn	Drivers: isdn: hisax: isac.c: Fix assignment and check into one expression.	2016-03-27 22:38:12 -04:00
leds	platform-drivers-x86 for 4.6-1	2016-03-23 17:20:59 -07:00
lguest	lguest, x86/entry/32: Fix handling of guest syscalls using interrupt gates	2016-04-01 08:58:13 +02:00
lightnvm	lightnvm: do not load L2P table if not supported	2016-03-18 18:10:38 -07:00
macintosh	…
mailbox	Merge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration	2016-04-14 18:40:47 -07:00
mcb	…
md	dm cache metadata: fix cmd_read_lock() acquiring write lock	2016-04-17 11:24:46 -04:00
media	media fixes for v4.6-rc2	2016-04-05 06:47:50 -07:00
memory	MTD updates for v4.6	2016-03-24 19:57:15 -07:00
memstick	drivers/memstick/host/r592.c: avoid gcc-6 warning	2016-03-25 16:37:42 -07:00
message	…
mfd	- New Drivers	2016-03-18 10:15:11 -07:00
misc	lkdtm: do not leak free page on kmalloc failure	2016-04-06 16:22:25 -07:00
mmc	mmc: tegra: Disable UHS-I modes for Tegra124	2016-04-14 11:40:01 +02:00
mtd	One MTD fix for v4.6-rc4:	2016-04-15 15:25:09 -07:00
net	tuntap: restore default qdisc	2016-04-08 15:52:45 -04:00
nfc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-03-19 10:05:34 -07:00
ntb	NTB: Remove _addr functions from ntb_hw_amd	2016-03-26 11:44:33 -04:00
nubus	…
nvdimm	libnvdimm: stop requiring a driver ->remove() method	2016-05-18 09:13:13 -07:00
nvme	NVMe: Always use MSI/MSI-x interrupts	2016-04-14 14:04:50 -06:00
nvmem	…
of	DeviceTree updates for 4.6:	2016-03-19 15:15:07 -07:00
oprofile	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
parisc	…
parport	…
pci	pci-sysfs: use proper file capability helper function	2016-04-14 12:56:09 -07:00
pcmcia	pcmcia: db1xxx_ss: fix last irq_to_gpio user	2016-03-29 22:48:53 +02:00
perf	drivers/perf: arm_pmu: avoid NULL dereference when not using devicetree	2016-03-21 11:36:17 +00:00
phy	…
pinctrl	Revert "Revert "pinctrl: lantiq: Implement gpio_chip.to_irq""	2016-04-01 15:21:27 +02:00
platform	Convert straggling drivers to new six-argument get_user_pages()	2016-04-02 18:35:05 -05:00
pnp	…
power	Power management and ACPI material for v4.6-rc1, part 2	2016-03-25 16:55:37 -07:00
powercap	powercap: intel_rapl: Add missing Haswell model	2016-04-05 03:44:48 +02:00
pps	…
ps3	…
ptp	…
pwm	pwm: fsl-ftm: Use flat regmap cache	2016-04-14 16:54:00 +02:00
rapidio	Convert straggling drivers to new six-argument get_user_pages()	2016-04-02 18:35:05 -05:00
ras	…
regulator	- New Drivers	2016-03-18 10:15:11 -07:00
remoteproc	remoteproc: st: fix check of syscon_regmap_lookup_by_phandle() return value	2016-03-28 16:19:00 -07:00
reset	…
rpmsg	…
rtc	RTC for 4.6 #2	2016-03-24 22:49:08 -07:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux	2016-04-01 07:15:54 -05:00
sbus	…
scsi	SCSI fixes on 20160408	2016-04-09 12:00:42 -07:00
sfi	…
sh	…
sn	…
soc	ARM: SoC driver updates for v4.6	2016-03-20 15:40:32 -07:00
spi	Merge remote-tracking branches 'spi/fix/omap2' and 'spi/fix/rockchip' into spi-linus	2016-04-04 10:05:49 -07:00
spmi	…
ssb	…
staging	Staging / IIO driver fixes for 4.6-rc3	2016-04-09 12:09:37 -07:00
target	target: add a new add_wwn_groups fabrics method	2016-03-30 20:06:44 -07:00
tc	…
thermal	Thermal: Ignore invalid trip points	2016-03-18 14:10:57 +08:00
thunderbolt	…
tty	tty: Fix merge of "tty: Refactor tty_open()"	2016-03-31 20:49:39 -07:00
uio	…
usb	usb: hcd: out of bounds access in for_each_companion	2016-04-13 12:06:18 -07:00
uwb	…
vfio	VFIO updates for v4.6-rc1	2016-03-17 13:05:09 -07:00
vhost	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2016-03-22 12:41:14 -07:00
video	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
virt	…
virtio	virtio: virtio 1.0 cs04 spec compliance for reset	2016-04-07 15:16:39 +03:00
vlynq	…
vme	…
w1	…
watchdog	hpwdt: use nmi_panic() when kernel panics in NMI handler	2016-03-22 15:36:02 -07:00
xen	xen/events: Mask a moving irq	2016-04-04 11:18:00 +01:00
zorro	…
Kconfig	/dev/dax, pmem: direct access to persistent memory	2016-05-20 22:02:53 -07:00
Makefile	/dev/dax, pmem: direct access to persistent memory	2016-05-20 22:02:53 -07:00