Oliver O'Halloran 6426aaa60c libnvdimm: Fix altmap reservation size calculation ... commit 07464e8836 upstream. Libnvdimm reserves the first 8K of pfn and devicedax namespaces to store a superblock describing the namespace. This 8K reservation is contained within the altmap area which the kernel uses for the vmemmap backing for the pages within the namespace. The altmap allows for some pages at the start of the altmap area to be reserved and that mechanism is used to protect the superblock from being re-used as vmemmap backing. The number of PFNs to reserve is calculated using: PHYS_PFN(SZ_8K) Which is implemented as: #define PHYS_PFN(x) ((unsigned long)((x) >> PAGE_SHIFT)) So on systems where PAGE_SIZE is greater than 8K the reservation size is truncated to zero and the superblock area is re-used as vmemmap backing. As a result all the namespace information stored in the superblock (i.e. if it's a PFN or DAX namespace) is lost and the namespace needs to be re-created to get access to the contents. This patch fixes this by using PFN_UP() rather than PHYS_PFN() to ensure that at least one page is reserved. On systems with a 4K pages size this patch should have no effect. Cc: stable@vger.kernel.org Cc: Dan Williams <dan.j.williams@intel.com> Fixes: ac515c084b ("libnvdimm, pmem, pfn: move pfn setup to the core") Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Reviewed-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-03-23 14:35:18 +01:00
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accessibility
acpi	ACPI: NUMA: Use correct type for printing addresses on i386-PAE	2019-02-20 10:20:48 +01:00
amba
android	binder: fix race that allows malicious free of live buffer	2018-12-05 19:41:26 +01:00
ata	sata_rcar: fix deferred probing	2019-02-12 19:46:03 +01:00
atm	atm: he: fix sign-extension overflow on large shift	2019-02-27 10:08:05 +01:00
auxdisplay	auxdisplay: ht16k33: fix potential user-after-free on module unload	2019-03-23 14:35:13 +01:00
base	driver core: Postpone DMA tear-down until after devres release	2019-03-13 14:03:23 -07:00
bcma
block	floppy: check_events callback should not return a negative number	2019-03-23 14:35:12 +01:00
bluetooth	Bluetooth: btbcm: Add entry for BCM4335C0 UART bluetooth	2018-11-13 11:14:54 -08:00
bus	bus: arm-cci: remove unnecessary unreachable()	2018-12-01 09:42:49 +01:00
cdrom	gdrom: fix a memory leak bug	2019-02-12 19:46:09 +01:00
char	applicom: Fix potential Spectre v1 vulnerabilities	2019-03-13 14:03:10 -07:00
clk	clk: sunxi: A31: Fix wrong AHB gate number	2019-03-23 14:35:13 +01:00
clocksource	clocksource/drivers/integrator-ap: Add missing of_node_put()	2019-01-26 09:37:05 +01:00
connector
cpufreq	cpufreq: Use struct kobj_attribute instead of struct global_attr	2019-03-13 14:03:06 -07:00
cpuidle	cpuidle: big.LITTLE: fix refcount leak	2019-02-12 19:46:03 +01:00
crypto	crypto: rockchip - update new iv to device in multiple operations	2019-03-23 14:35:10 +01:00
dax
dca
devfreq
dio
dma	dmaengine: dmatest: Abort test in case of mapping error	2019-03-13 14:03:21 -07:00
dma-buf
edac	EDAC, skx_edac: Fix logical channel intermediate decoding	2018-11-13 11:15:06 -08:00
eisa
extcon	extcon: Release locking when sending the notification of connector state	2018-09-09 19:55:56 +02:00
firewire
firmware	iscsi_ibft: Fix missing break in switch statement	2019-03-13 14:03:22 -07:00
fmc
fpga	fpga: altera-cvp: Fix registration for CvP incapable devices	2019-02-12 19:45:58 +01:00
fsi
gpio	gpio: vf610: Mask all GPIO interrupts	2019-03-13 14:03:13 -07:00
gpu	gpu: ipu-v3: Fix CSI offsets for imx53	2019-03-23 14:35:11 +01:00
hid	HID: debug: fix the ring buffer implementation	2019-02-15 08:09:13 +01:00
hsi
hv	Drivers: hv: vmbus: Check for ring when getting debug info	2019-01-31 08:13:44 +01:00
hwmon	hwmon: (tmp421) Correct the misspelling of the tmp442 compatible attribute in OF device ID table	2019-02-27 10:08:05 +01:00
hwspinlock
hwtracing	stm class: Prevent division by zero	2019-03-23 14:35:17 +01:00
i2c	i2c: bcm2835: Clear current buffer pointers and counts after a transfer	2019-03-23 14:35:13 +01:00
ide	ide: pmac: add of_node_put()	2018-12-21 14:13:14 +01:00
idle
iio	iio: adc: exynos-adc: Fix NULL pointer exception on unbind	2019-03-23 14:35:09 +01:00
infiniband	IB/{hfi1, qib}: Fix WC.byte_len calculation for UD_SEND_WITH_IMM	2019-03-13 14:03:11 -07:00
input	Input: st-keyscan - fix potential zalloc NULL dereference	2019-03-23 14:35:13 +01:00
iommu	iommu/amd: Fix IOMMU page flush when detach device from a domain	2019-03-13 14:03:12 -07:00
ipack
irqchip	irqchip/mmp: Only touch the PJ4 IRQ & FIQ bits on enable/disable	2019-03-13 14:03:20 -07:00
isdn	isdn: avm: Fix string plus integer warning from Clang	2019-02-27 10:08:06 +01:00
leds	leds: lp5523: fix a missing check of return value of lp55xx_read	2019-02-27 10:08:05 +01:00
lightnvm	lightnvm: pblk: fix two sleep-in-atomic-context bugs	2018-11-13 11:14:52 -08:00
macintosh	macintosh/via-pmu: Add missing mmio accessors	2018-09-19 22:43:41 +02:00
mailbox	mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush timeout issue	2019-03-23 14:35:15 +01:00
mcb
md	It's wrong to add len to sector_nr in raid10 reshape twice	2019-03-19 13:13:25 +01:00
media	media: videobuf2-v4l2: drop WARN_ON in vb2_warn_zero_bytesused()	2019-03-23 14:35:17 +01:00
memory
memstick	memstick: Prevent memstick host from getting runtime suspended during card detection	2019-02-12 19:46:04 +01:00
message
mfd	mfd: mc13xxx: Fix a missing check of a register-read failure	2019-02-27 10:08:03 +01:00
misc	eeprom: at24: add support for 24c2048	2019-02-20 10:20:44 +01:00
mmc	mmc: sdhci-esdhc-imx: correct the fix of ERR004536	2019-03-05 17:58:02 +01:00
mtd	mtd: rawnand: gpmi: fix MX28 bus master lockup problem	2019-02-15 08:09:11 +01:00
mux
net	net: set static variable an initial value in atl2_probe()	2019-03-23 14:35:17 +01:00
nfc	NFC: nfcmrvl_uart: fix OF child-node lookup	2018-12-01 09:42:54 +01:00
ntb
nubus
nvdimm	libnvdimm: Fix altmap reservation size calculation	2019-03-23 14:35:18 +01:00
nvme	nvme-pci: use the same attributes when freeing host_mem_desc_bufs.	2019-02-20 10:20:50 +01:00
nvmem	nvmem: Don't let a NULL cell_id for nvmem_cell_get() crash us	2018-08-24 13:09:14 +02:00
of	OF: properties: add missing of_node_put	2019-01-23 08:09:49 +01:00
oprofile
parisc
parport	parport: sunbpp: fix error return code	2018-09-26 08:38:12 +02:00
pci	switchtec: Fix SWITCHTEC_IOCTL_EVENT_IDX_ALL flags overwrite	2019-02-12 19:46:04 +01:00
pcmcia	pcmcia: Implement CLKRUN protocol disabling for Ricoh bridges	2018-11-13 11:14:46 -08:00
perf	arm64: perf: Reject stand-alone CHAIN events for PMUv3	2018-10-18 09:16:24 +02:00
phy	phy: tegra: remove redundant self assignment of 'map'	2019-02-27 10:08:09 +01:00
pinctrl	pinctrl: meson: meson8b: fix the sdxc_a data 1..3 pins	2019-03-23 14:35:14 +01:00
platform	platform/x86: Fix unmet dependency warning for SAMSUNG_Q10	2019-03-13 14:03:15 -07:00
pnp
power	power: supply: olpc_battery: correct the temperature units	2019-01-13 10:01:07 +01:00
powercap
pps
ps3
ptp	ptp: Fix pass zero to ERR_PTR() in ptp_clock_register	2019-02-12 19:45:59 +01:00
pwm	pwm: meson: Fix mux clock names	2018-09-15 09:45:27 +02:00
rapidio
ras
regulator	regulator: fix crash caused by null driver data	2018-10-03 17:00:55 -07:00
remoteproc
reset	reset: make device_reset_optional() really optional	2018-12-08 13:03:40 +01:00
rpmsg	rpmsg: smd: fix memory leak on channel create	2018-11-13 11:15:12 -08:00
rtc	rtc: m41t80: Correct alarm month range with RTC reads	2019-01-09 17:14:52 +01:00
s390	s390/dasd: fix using offset into zero size array error	2019-03-23 14:35:11 +01:00
sbus	drivers/sbus/char: add of_node_put()	2018-12-21 14:13:13 +01:00
scsi	scsi: libiscsi: Fix race between iscsi_xmit_task and iscsi_complete_task	2019-03-23 14:35:14 +01:00
sfi
sh
sn
soc	soc: fsl: qbman: avoid race in clearing QMan interrupt	2019-03-13 14:03:19 -07:00
spi	spi: bcm2835: Unbreak the build of esoteric configs	2019-01-09 17:14:53 +01:00
spmi
ssb
staging	staging: android: ion: fix sys heap pool's gfp_flags	2019-03-13 14:03:07 -07:00
target	scsi: target: use consistent left-aligned ASCII INQUIRY data	2019-01-26 09:37:03 +01:00
tc	TC: Set DMA masks for devices	2018-11-13 11:15:11 -08:00
tee
thermal	drivers: thermal: int340x_thermal: Fix sysfs race condition	2019-03-05 17:58:00 +01:00
thunderbolt
tty	serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling	2019-03-05 17:58:00 +01:00
uio	Revert "uio: use request_threaded_irq instead"	2019-02-15 08:09:14 +01:00
usb	usb: phy: fix link errors	2019-03-13 14:03:20 -07:00
uwb	uwb: hwa-rc: fix memory leak at probe	2018-10-03 17:00:46 -07:00
vfio
vhost	vhost/vsock: fix vhost vsock cid hashing inconsistent	2019-03-19 13:13:25 +01:00
video	fbdev: fbcon: Fix unregister crash when more than one framebuffer	2019-02-12 19:46:07 +01:00
virt
virtio	virtio_balloon: fix increment of vb->num_pfns in fill_balloon()	2018-10-13 09:27:30 +02:00
vlynq
vme
w1	w1: omap-hdq: fix missing bus unregister at removal	2018-11-13 11:15:09 -08:00
watchdog	watchdog: renesas_wdt: don't set divider while watchdog is running	2019-02-12 19:46:03 +01:00
xen	xen/pvcalls: remove set but not used variable 'intf'	2019-02-27 10:08:03 +01:00
zorro
Kconfig
Makefile