Christoph Hellwig 3dd60fb9d9 nvdimm/pmem: stop using q_usage_count as external pgmap refcount ... Originally all DAX access when through block_device operations and thus needed a queue reference. But since commit cccbce6715 ("filesystem-dax: convert to dax_direct_access()") all this happens at the DAX device level which uses its own refcounting. Having the external refcount thus wasn't needed but has otherwise been harmless for long time. But now that "block: drain file system I/O on del_gendisk" waits for q_usage_count to reach 0 in del_gendisk this whole scheme can't work anymore (and pmem is the only driver abusing q_usage_count like that). So switch to the internal reference and remove the unbalanced blk_freeze_queue_start that is taken care of by del_gendisk. Fixes: 8e141f9eb8 ("block: drain file system I/O on del_gendisk") Reported-by: Yi Zhang <yi.zhang@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20211019073641.2323410-2-hch@lst.de Signed-off-by: Dan Williams <dan.j.williams@intel.com>		2021-10-25 16:12:32 -07:00
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Kconfig	…
Makefile	…
badrange.c	…
blk.c	nvdimm-blk: convert to blk_alloc_disk/blk_cleanup_disk	2021-06-01 07:42:23 -06:00
btt.c	nvdimm-btt: convert to blk_alloc_disk/blk_cleanup_disk	2021-06-01 07:42:23 -06:00
btt.h	nvdimm-btt: convert to blk_alloc_disk/blk_cleanup_disk	2021-06-01 07:42:23 -06:00
btt_devs.c	…
bus.c	bus: Make remove callback return void	2021-07-21 11:53:42 +02:00
claim.c	…
core.c	…
dax_devs.c	…
dimm.c	libnvdimm: Make remove callback return void	2021-02-16 19:35:29 -08:00
dimm_devs.c	libnvdimm: Export nvdimm shutdown helper, nvdimm_delete()	2021-06-15 16:47:22 -07:00
e820.c	…
label.c	libnvdimm/labels: Add claim class helpers	2021-08-24 12:08:28 -07:00
label.h	libnvdimm/labels: Add claim class helpers	2021-08-24 12:08:28 -07:00
namespace_devs.c	cxl for v5.15	2021-09-09 11:48:27 -07:00
nd-core.h	…
nd.h	libnvdimm/labels: Add claim class helpers	2021-08-24 12:08:28 -07:00
nd_virtio.c	…
of_pmem.c	…
pfn.h	…
pfn_devs.c	…
pmem.c	nvdimm/pmem: stop using q_usage_count as external pgmap refcount	2021-10-25 16:12:32 -07:00
pmem.h	…
region.c	libnvdimm: Make remove callback return void	2021-02-16 19:35:29 -08:00
region_devs.c	libnvdimm/region: Fix nvdimm_has_flush() to handle ND_REGION_ASYNC	2021-04-09 21:56:01 -07:00
security.c	…
virtio_pmem.c	…
virtio_pmem.h	…