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(parent: 514caf2) | patch
memremap: provide an optional internal refcount in struct dev_pagemap
authorChristoph Hellwig <hch@lst.de>
Wed, 26 Jun 2019 12:27:14 +0000 (14:27 +0200)
committerJason Gunthorpe <jgg@mellanox.com>
Tue, 2 Jul 2019 17:32:44 +0000 (14:32 -0300)
commit24917f6b1041a73993178920656e13364f847995
tree3257cca350460fae4d73b136b5de7c1c91d4915atree | snapshot
parent514caf23a70fd697fa2ece238b2cd8dcc73fb16fcommit | diff
memremap: provide an optional internal refcount in struct dev_pagemap

Provide an internal refcounting logic if no ->ref field is provided
in the pagemap passed into devm_memremap_pages so that callers don't
have to reinvent it poorly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
include/linux/memremap.h diff | blob | blame | history
kernel/memremap.c diff | blob | blame | history
tools/testing/nvdimm/test/iomap.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)