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Vivek Goyal 1a9d5d4059 dax: Modify bdev_dax_pgoff() to handle NULL bdev 
virtiofs does not have a block device but it has dax device.
Modify bdev_dax_pgoff() to be able to handle that.

If there is no bdev, that means dax offset is 0. (It can't be a partition
block device starting at an offset in dax device).

This is little hackish. There have been discussions about getting rid
of dax not supporting partitions.

https://lore.kernel.org/linux-fsdevel/20200107125159.GA15745@infradead.org/

IMHO, this path can easily break exisitng users. For example
ioctl(BLKPG_ADD_PARTITION) will start breaking on block devices
supporting DAX. Also, I personally find it very useful to be able to
partition dax devices and still be able to use DAX.

Alternatively, I tried to store offset into dax device information in iomap
interface, but that got NACKed.

https://lore.kernel.org/linux-fsdevel/20200217133117.GB20444@infradead.org/

I can't think of a good path to solve this issue properly. So to make
progress, it seems this patch is least bad option for now and I hope
we can take it.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Vishal L Verma <vishal.l.verma@intel.com>
Cc: "Weiny, Ira" <ira.weiny@intel.com>
Cc: linux-nvdimm@lists.01.org
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
 		2020-09-10 11:39:22 +02:00
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accessibility Char/Misc driver fixes for 5.9-rc3 2020-08-26 10:50:50 -07:00
acpi Merge branch 'acpi-mm' 2020-08-28 21:17:56 +02:00
amba
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android
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ata treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
atm treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
auxdisplay treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
base Device properties framework fix for 5.9-rc3 2020-08-28 13:23:31 -07:00
bcma bcma: gpio: Use irqchip template 2020-08-02 18:26:51 +03:00
block block-5.9-2020-08-28 2020-08-28 16:38:29 -07:00
bluetooth Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next 2020-07-31 15:11:52 -07:00
bus treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
cdrom
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char Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-08-30 15:53:44 -07:00
clk More ACPI updates for 5.9-rc1 2020-08-15 08:18:22 -07:00
clocksource treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
connector
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counter
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cpufreq Power management fixes for 5.9-rc3 2020-08-28 13:12:09 -07:00
cpuidle cpuidle: Make CPUIDLE_FLAG_TLB_FLUSHED generic 2020-08-26 12:41:53 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-08-30 15:53:44 -07:00
dax dax: Modify bdev_dax_pgoff() to handle NULL bdev 2020-09-10 11:39:22 +02:00
dca
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devfreq
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dio
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dma fsldma: fix very broken 32-bit ppc ioread64 functionality 2020-08-29 13:50:56 -07:00
dma-buf A set of locking fixes and updates: 2020-08-10 19:07:44 -07:00
edac A fix to properly clear ghes_edac driver state on driver remove so that 2020-08-30 10:47:23 -07:00
eisa
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extcon
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firewire treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
firmware A set of fixes for interrupt chip drivers: 2020-08-30 11:56:54 -07:00
fpga
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fsi
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gnss
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gpio treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
gpu drm fixes for 5.9-rc3 2020-08-28 09:46:48 -07:00
greybus
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hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2020-08-25 11:13:29 -07:00
hsi treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
hv hyperv-fixes for 5.9-rc3 2020-08-26 10:44:15 -07:00
hwmon hwmon fixes for v5.9-rc3 2020-08-29 12:37:00 -07:00
hwspinlock
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hwtracing treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
i2c Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2020-08-29 13:13:44 -07:00
i3c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ide treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
idle cpuidle: Make CPUIDLE_FLAG_TLB_FLUSHED generic 2020-08-26 12:41:53 +02:00
iio iio: dpot-dac: fix code comment in dpot_dac_read_raw() 2020-08-26 14:02:24 -05:00
infiniband treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
input treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
interconnect Char/Misc driver patches for 5.9-rc1 2020-08-05 11:43:47 -07:00
iommu treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ipack
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irqchip A set of fixes for interrupt chip drivers: 2020-08-30 11:56:54 -07:00
isdn treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
leds LEDs changes for 5.9-rc1. 2020-08-05 19:24:27 -07:00
lightnvm treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
macintosh treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
mailbox iomap: constify ioreadX() iomem argument (as in generic implementation) 2020-08-14 19:56:57 -07:00
mcb
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md block-5.9-2020-08-28 2020-08-28 16:38:29 -07:00
media media: dib0700: Fix identation issue in dib8096_set_param_override() 2020-08-27 15:36:28 -05:00
memory treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
memstick treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
message treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
mfd - Bug Fixes 2020-08-28 10:15:33 -07:00
misc Char/Misc driver fixes for 5.9-rc3 2020-08-26 10:50:50 -07:00
mmc treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
most drivers: most: add USB adapter driver 2020-07-31 14:38:12 +02:00
mtd This pull request contains changes for JFFS2, UBI and UBIFS 2020-08-10 18:20:04 -07:00
mux treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
net treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nfc treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ntb treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
nubus
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nvdimm libnvdimm: KASAN: global-out-of-bounds Read in internal_create_group 2020-08-17 14:47:38 -06:00
nvme io_uring-5.9-2020-08-23 2020-08-24 11:53:15 -07:00
nvmem
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of of: address: Work around missing device_type property in pcie nodes 2020-08-19 16:30:57 -06:00
opp opp: Enable resources again if they were disabled earlier 2020-08-20 11:30:22 +05:30
oprofile
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parisc Merge branch 'parisc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2020-08-12 12:41:15 -07:00
parport treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
pci treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
pcmcia treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
perf treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
phy treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
pinctrl This is the bulk of the pin control changes for the v5.9 2020-08-09 12:52:28 -07:00
platform treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
pnp
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power treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
powercap This tree adds the sched_set_fifo*() encapsulation APIs to remove 2020-08-06 11:55:43 -07:00
pps
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ps3 treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ptp ptp: ptp_clockmatrix: use i2c_master_send for i2c write 2020-08-19 16:23:22 -07:00
pwm pwm: Changes for v5.9-rc1 2020-08-14 16:00:09 -07:00
rapidio treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
ras
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regulator treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
remoteproc treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
reset treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
rpmsg treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
rtc treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
s390 treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
sbus
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scsi treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
sfi
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sh iomap: constify ioreadX() iomem argument (as in generic implementation) 2020-08-14 19:56:57 -07:00
siox
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slimbus
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soc treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
soundwire
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spi treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
spmi
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ssb treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
staging treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
target treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
tc
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tee
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thermal treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
thunderbolt treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
tty TTY/Serial fixes for 5.9-rc3 2020-08-26 10:58:20 -07:00
uio
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usb USB fixes for 5.9-rc3 - take 2 2020-08-30 10:51:03 -07:00
vdpa vdpa/mlx5: Avoid warnings about shifts on 32-bit platforms 2020-08-26 08:13:59 -04:00
vfio treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
vhost vhost-iotlb: fix vhost_iotlb_itree_next() documentation 2020-08-26 08:13:59 -04:00
video powerpc fixes for 5.9 #4 2020-08-30 10:56:12 -07:00
virt
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virtio virtio: Implement get_shm_region for MMIO transport 2020-09-10 10:05:58 +02:00
visorbus
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vlynq
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vme
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w1
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watchdog treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
xen xen: branch for v5.9-rc3 2020-08-29 12:44:30 -07:00
zorro
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Kconfig
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Makefile
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