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linux/drivers/nvdimm
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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 cccbce671582
("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: 8e141f9eb803 ("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
..
badrange.c
mm/memremap_pages: convert to 'struct range'
2020-10-13 18:38:28 -07:00
blk.c
nvdimm-blk: convert to blk_alloc_disk/blk_cleanup_disk
2021-06-01 07:42:23 -06:00
btt_devs.c
libnvdimm: Move attribute groups to device type
2019-11-17 09:17:38 -08:00
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
bus.c
bus: Make remove callback return void
2021-07-21 11:53:42 +02:00
claim.c
libnvdimm: Cleanup include of badblocks.h
2020-12-15 21:47:45 -08:00
core.c
libnvdimm: Cleanup include of badblocks.h
2020-12-15 21:47:45 -08:00
dax_devs.c
libnvdimm: Move attribute groups to device type
2019-11-17 09:17:38 -08:00
dimm_devs.c
libnvdimm: Export nvdimm shutdown helper, nvdimm_delete()
2021-06-15 16:47:22 -07:00
dimm.c
libnvdimm: Make remove callback return void
2021-02-16 19:35:29 -08:00
e820.c
libnvdimm/e820: Retrieve and populate correct 'target_node' info
2020-02-18 10:28:05 -08:00
Kconfig
lib: Uplevel the pmem "region" ida to a global allocator
2019-11-07 15:44:29 +01:00
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
Makefile
libnvdimm: Enable unit test infrastructure compile checks
2019-09-07 04:28:05 -03:00
namespace_devs.c
cxl for v5.15
2021-09-09 11:48:27 -07:00
nd_virtio.c
virtio_pmem: fix sparse warning
2019-07-16 19:44:26 -07:00
nd-core.h
PM, libnvdimm: Add runtime firmware activation support
2020-07-28 19:28:32 -06:00
nd.h
libnvdimm/labels: Add claim class helpers
2021-08-24 12:08:28 -07:00
of_pmem.c
powerpc/pmem: Initialize pmem device on newer hardware
2020-07-16 13:00:23 +10:00
pfn_devs.c
mm/memremap_pages: support multiple ranges per invocation
2020-10-13 18:38:28 -07:00
pfn.h
libnvdimm/namespace: Enforce memremap_compat_align()
2020-03-17 12:23:21 -07:00
pmem.c
nvdimm/pmem: stop using q_usage_count as external pgmap refcount
2021-10-25 16:12:32 -07:00
pmem.h
libnvdimm, pmem: Restore page attributes when clearing errors
2018-08-20 09:22:45 -07:00
region_devs.c
libnvdimm/region: Fix nvdimm_has_flush() to handle ND_REGION_ASYNC
2021-04-09 21:56:01 -07:00
region.c
libnvdimm: Make remove callback return void
2021-02-16 19:35:29 -08:00
security.c
libnvdimm for 5.9
2020-08-11 10:59:19 -07:00
virtio_pmem.c
virtio_pmem: convert to LE accessors
2020-08-05 11:08:41 -04:00
virtio_pmem.h
virtio-pmem: Add virtio pmem driver
2019-07-05 15:19:10 -07:00