diff options
| author | Shiyang Ruan <ruansy.fnst@fujitsu.com> | 2022-12-01 18:28:53 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-12-12 05:12:16 +0300 |
| commit | 708dfad2eb4169324189782edd6d3763237e0489 (patch) | |
| tree | 593ca196cfac41ed29e60751cd587779c826cd4b /Makefile | |
| parent | f80e1668888f34c0764822e74953c997daf2ccdb (diff) | |
| download | linux-708dfad2eb4169324189782edd6d3763237e0489.tar.xz | |
fsdax: zero the edges if source is HOLE or UNWRITTEN
If srcmap contains invalid data, such as HOLE and UNWRITTEN, the dest page
should be zeroed. Otherwise, since it's a pmem, old data may remains on
the dest page, the result of CoW will be incorrect.
The function name is also not easy to understand, rename it to
"dax_iomap_copy_around()", which means it copies data around the range.
[akpm@linux-foundation.org: update dax_iomap_copy_around() kerneldoc, per Darrick]
Link: https://lkml.kernel.org/r/1669973145-318-1-git-send-email-ruansy.fnst@fujitsu.com
Link: https://lkml.kernel.org/r/1669908538-55-4-git-send-email-ruansy.fnst@fujitsu.com
Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions