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4a123dbaf3
- Fix an original bug in device-mapper table reference counting when
interrogating dax capability in the component device. This bug was
hidden by the following bug.
- Fix device-mapper to use the proper helper (dax_supported() instead of
the leaf helper generic_fsdax_supported()) to determine dax operation
of a stacked block device configuration. The original implementation
is only valid for one level of dax-capable block device stacking. This
bug was discovered while fixing the below regression.
- Fix an infinite recursion regression introduced by broken attempts to
quiet the generic_fsdax_supported() path and make it bail out before
logging "dax capability not found" errors.
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Merge tag 'libnvdimm-fixes-5.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm fixes from Dan Williams:
"A handful of fixes to address a string of mistakes in the mechanism
for device-mapper to determine if its component devices are dax
capable.
- Fix an original bug in device-mapper table reference counting when
interrogating dax capability in the component device. This bug was
hidden by the following bug.
- Fix device-mapper to use the proper helper (dax_supported() instead
of the leaf helper generic_fsdax_supported()) to determine dax
operation of a stacked block device configuration. The original
implementation is only valid for one level of dax-capable block
device stacking. This bug was discovered while fixing the below
regression.
- Fix an infinite recursion regression introduced by broken attempts
to quiet the generic_fsdax_supported() path and make it bail out
before logging "dax capability not found" errors"
* tag 'libnvdimm-fixes-5.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
dax: Fix stack overflow when mounting fsdax pmem device
dm: Call proper helper to determine dax support
dm/dax: Fix table reference counts
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