The patch titled
Subject: device-dax: use struct_size()
has been added to the -mm tree. Its filename is
device-dax-use-struct_size.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/device-dax-use-struct_size.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/device-dax-use-struct_size.patch
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------------------------------------------------------
From: Joao Martins <joao.m.martins@xxxxxxxxxx>
Subject: device-dax: use struct_size()
Use the struct_size() helper for the size of a struct with variable array
member at the end, rather than manually calculating it.
Link: https://lkml.kernel.org/r/20211202204422.26777-7-joao.m.martins@xxxxxxxxxx
Suggested-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Joao Martins <joao.m.martins@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: Jane Chu <jane.chu@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/dax/device.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/dax/device.c~device-dax-use-struct_size
+++ a/drivers/dax/device.c
@@ -404,8 +404,9 @@ int dev_dax_probe(struct dev_dax *dev_da
return -EINVAL;
if (!pgmap) {
- pgmap = devm_kzalloc(dev, sizeof(*pgmap) + sizeof(struct range)
- * (dev_dax->nr_range - 1), GFP_KERNEL);
+ pgmap = devm_kzalloc(dev,
+ struct_size(pgmap, ranges, dev_dax->nr_range - 1),
+ GFP_KERNEL);
if (!pgmap)
return -ENOMEM;
pgmap->nr_range = dev_dax->nr_range;
_
Patches currently in -mm which might be from joao.m.martins@xxxxxxxxxx are
mm-page_alloc-split-prep_compound_page-into-head-and-tail-subparts.patch
mm-page_alloc-refactor-memmap_init_zone_device-page-init.patch
mm-memremap-add-zone_device-support-for-compound-pages.patch
device-dax-use-align-for-determining-pgoff.patch
device-dax-use-struct_size.patch
device-dax-ensure-dev_dax-pgmap-is-valid-for-dynamic-devices.patch
device-dax-factor-out-page-mapping-initialization.patch
device-dax-set-mapping-prior-to-vmf_insert_pfn_pmdpud.patch
device-dax-remove-pfn-from-__dev_dax_ptepmdpud_fault.patch
device-dax-compound-devmap-support.patch
