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linux/drivers
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Dan Williams 60622d6822 x86/asm/memcpy_mcsafe: Return bytes remaining 
Machine check safe memory copies are currently deployed in the pmem
driver whenever reading from persistent memory media, so that -EIO is
returned rather than triggering a kernel panic. While this protects most
pmem accesses, it is not complete in the filesystem-dax case. When
filesystem-dax is enabled reads may bypass the block layer and the
driver via dax_iomap_actor() and its usage of copy_to_iter().

In preparation for creating a copy_to_iter() variant that can handle
machine checks, teach memcpy_mcsafe() to return the number of bytes
remaining rather than -EFAULT when an exception occurs.

Co-developed-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: hch@lst.de
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-nvdimm@lists.01.org
Link: http://lkml.kernel.org/r/152539238119.31796.14318473522414462886.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-05-15 08:32:42 +02:00
..
accessibility
acpi ACPI fixes for 4.17-rc3 2018-04-26 11:06:36 -07:00
amba ARM: amba: Fix race condition with driver_override 2018-04-26 10:35:04 +02:00
android ANDROID: binder: prevent transactions into own process. 2018-04-23 12:12:41 +02:00
ata driver core: add __printf verification to __ata_ehi_pushv_desc 2018-05-07 08:32:20 -07:00
atm firestream: fix spelling mistake: "reseverd" -> "reserved" 2018-05-10 15:23:49 -04:00
auxdisplay
base Driver core fixes for 4.17-rc3 2018-04-27 10:12:20 -07:00
bcma
block libceph: add osd_req_op_extent_osd_data_bvecs() 2018-05-10 10:15:05 +02:00
bluetooth Bluetooth: btusb: Add Dell XPS 13 9360 to btusb_needs_reset_resume_table 2018-04-30 10:56:04 +02:00
bus HISI LPC: Add Kconfig MFD_CORE dependency 2018-04-26 16:53:23 +02:00
cdrom cdrom: information leak in cdrom_ioctl_media_changed() 2018-04-18 08:21:32 -06:00
char agp: uninorth: make two functions static 2018-05-10 11:26:08 +10:00
clk First round of fixes for meson clocks targeted for v4.17 2018-05-01 14:44:16 -07:00
clocksource clocksource/imx-tpm: Correct -ETIME return condition check 2018-04-19 13:21:35 +02:00
connector
cpufreq cpufreq / CPPC: Set platform specific transition_delay_us 2018-04-30 10:14:08 +02:00
cpuidle cpuidle: menu: Avoid selecting shallow states with stopped tick 2018-04-09 11:54:57 +02:00
crypto .gitignore: move *-asn1.[ch] patterns to the top-level .gitignore 2018-04-07 19:04:02 +09:00
dax device-dax: allow MAP_SYNC to succeed 2018-04-19 15:11:50 -07:00
dca
devfreq
dio
dma DMAengine updates for v4.17-rc1 2018-04-10 12:14:37 -07:00
dma-buf
edac * Add NVDIMM support to EDAC (Tony Luck) 2018-04-05 14:21:13 -07:00
eisa
extcon Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
firewire
firmware firmware: arm_scmi: remove redundant null check on array 2018-04-16 10:15:58 +01:00
fmc treewide: Fix typos in printk 2018-03-27 09:51:22 +02:00
fpga fpga-manager: altera-ps-spi: preserve nCONFIG state 2018-04-23 13:27:05 +02:00
fsi
gpio gpio: pcie-idio-24: Fix off-by-one error in get_multiple loop 2018-04-30 10:48:08 +02:00
gpu drm/amd/pp: Fix performance drop on Fiji 2018-05-10 08:25:22 -05:00
hid HID: i2c-hid: Add RESEND_REPORT_DESCR quirk for Toshiba Click Mini L9W-B 2018-05-09 13:58:01 +02:00
hsi
hv ARM: 2018-04-09 11:42:31 -07:00
hwmon hwmon: (k10temp) Add support for AMD Ryzen w/ Vega graphics 2018-04-25 05:31:06 -07:00
hwspinlock
hwtracing Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
i2c i2c: sprd: Fix the i2c count issue 2018-04-27 14:12:43 +02:00
ide for-4.17/block-20180402 2018-04-05 14:27:02 -07:00
idle
iio This is the bulk of GPIO changes for the v4.17 kernel cycle: 2018-04-05 09:51:41 -07:00
infiniband First pull request for 4.17-rc 2018-05-04 20:51:10 -10:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2018-05-02 17:34:42 -10:00
iommu iommu: rockchip: fix building without CONFIG_OF 2018-05-03 16:36:07 +02:00
ipack
irqchip irqchip/qcom: Fix check for spurious interrupts 2018-05-02 15:56:10 +02:00
isdn mISDN: Remove VLAs 2018-04-12 21:46:10 -04:00
leds
lightnvm lightnvm: pblk: remove some unnecessary NULL checks 2018-03-29 17:29:09 -06:00
macintosh powerpc updates for 4.17 2018-04-07 12:08:19 -07:00
mailbox
mcb
md - A stable fix for DM integrity to use kvfree. 2018-05-10 11:42:01 -07:00
media MAINTAINERS & files: Canonize the e-mails I use at files 2018-05-04 06:21:06 -04:00
memory ARM: OMAP2+: Fix build when using split object directories 2018-04-18 10:07:13 -07:00
memstick
message scsi: mptsas: Disable WRITE SAME 2018-04-18 23:37:25 -04:00
mfd platform/chrome: mfd/cros_ec_dev: Add sysfs entry to set keyboard wake lid angle 2018-04-10 22:25:07 -07:00
misc * Fix 2032 time access issues and new compiler warnings 2018-04-12 10:21:19 -07:00
mmc MMC host: 2018-04-20 10:41:31 -07:00
mtd mtd: rawnand: Make sure we wait tWB before polling the STATUS reg 2018-05-10 08:40:39 +02:00
mux
net ixgbe: fix memory leak on ipsec allocation 2018-05-11 12:22:22 -07:00
nfc
ntb
nubus
nvdimm x86/asm/memcpy_mcsafe: Return bytes remaining 2018-05-15 08:32:42 +02:00
nvme nvme: add quirk to force medium priority for SQ creation 2018-05-11 13:37:14 -06:00
nvmem Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
of DeviceTree fixes for 4.17: 2018-05-07 05:33:29 -10:00
opp
oprofile oprofilefs: don't oops on allocation failure 2018-03-29 15:07:48 -04:00
parisc parisc: Fix section mismatches 2018-05-02 21:47:35 +02:00
parport Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
pci PCI / PM: Check device_may_wakeup() in pci_enable_wake() 2018-05-10 16:50:26 +02:00
pcmcia Merge branch 'for-linus-sa1100' of git://git.armlinux.org.uk/~rmk/linux-arm 2018-04-09 09:26:36 -07:00
perf ARM: SoC driver updates for 4.17 2018-04-05 21:29:35 -07:00
phy ARM: SoC platform updates for 4.17 2018-04-05 21:21:08 -07:00
pinctrl pinctrl: sunrisepoint: Align GPIO number space with Windows 2018-05-02 14:36:00 +02:00
platform platform/x86: Kconfig: Fix dell-laptop dependency chain. 2018-05-04 22:20:14 +02:00
pnp
power ARM: SoC platform updates for 4.17 2018-04-05 21:21:08 -07:00
powercap
pps
ps3
ptp
pwm pwm: Changes for v4.17-rc1 2018-04-13 15:46:21 -07:00
rapidio rapidio: fix rio_dma_transfer error handling 2018-04-20 17:18:35 -07:00
ras
regulator Merge remote-tracking branches 'regulator/topic/88pg86x', 'regulator/topic/dt', 'regulator/topic/formatting' and 'regulator/topic/gpio' into regulator-next 2018-03-28 10:33:53 +08:00
remoteproc remoteproc: qcom: Fix potential device node leaks 2018-04-25 16:46:55 -07:00
reset Merge branch 'reset/lookup' into reset/next 2018-03-27 11:03:43 +02:00
rpmsg rpmsg: added MODULE_ALIAS for rpmsg_char 2018-04-25 16:46:55 -07:00
rtc rtc: opal: Fix OPAL RTC driver OPAL_BUSY loops 2018-04-25 13:24:13 +10:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-04-26 10:29:46 -07:00
sbus sparc64: Fix mistake in oradax license text 2018-04-30 16:06:01 -04:00
scsi scsi: isci: Fix infinite loop in while loop 2018-04-20 19:23:32 -04:00
sfi
sh
siox
slimbus slimbus: Fix out-of-bounds access in slim_slicesize() 2018-04-23 13:40:15 +02:00
sn
soc soc: bcm: raspberrypi-power: Fix use of __packed 2018-04-16 15:15:23 -07:00
soundwire
spi spi: SPI updates for v4.17 2018-04-03 12:06:21 -07:00
spmi
ssb
staging media: imx-media-csi: Fix inconsistent IS_ERR and PTR_ERR 2018-05-04 06:21:06 -04:00
target scsi: target: Fix fortify_panic kernel exception 2018-04-20 19:24:01 -04:00
tc
tee
thermal Merge branch 'thermal-soc' into next 2018-05-11 09:37:21 +08:00
thunderbolt
tty tty: Use __GFP_NOFAIL for tty_ldisc_get() 2018-04-25 15:03:44 +02:00
uio uio_hv_generic: fix subchannel ring mmap 2018-04-23 12:43:48 +02:00
usb USB-serial fixes for v4.17-rc4 2018-05-04 14:38:32 -07:00
uwb
vfio VFIO updates for v4.17-rc1 2018-04-06 19:44:27 -07:00
vhost vhost: return bool from *_access_ok() functions 2018-04-11 10:54:06 -04:00
video fbdev changes for v4.17: 2018-04-10 10:20:00 -07:00
virt virt: vbox: Log an error when we fail to get the host version 2018-04-23 13:41:55 +02:00
virtio virtio: feature 2018-04-11 18:58:27 -07:00
visorbus
vlynq
vme
w1
watchdog aspeed: watchdog: Set bootstatus during probe 2018-04-16 10:22:40 +02:00
xen xen: fixes and one header update for 4.17-rc2 2018-04-20 08:36:04 -07:00
zorro
Kconfig hwtracing: Add HW tracing support menu 2018-03-29 13:38:10 +03:00
Makefile