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| author | Alistair Popple <apopple@nvidia.com> | 2021-07-01 03:54:22 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-07-01 20:06:03 +0200 |
| commit | 9a5cc85c407402ae66128d31f0422a3a7ffa5c5c (patch) | |
| tree | 801de2493d54996d46135d7824a16abb5b24f76e /lib/test_hmm.c | |
| parent | mm: rename migrate_pgmap_owner (diff) | |
| download | linux-9a5cc85c407402ae66128d31f0422a3a7ffa5c5c.tar.xz linux-9a5cc85c407402ae66128d31f0422a3a7ffa5c5c.zip | |
mm/memory.c: allow different return codes for copy_nonpresent_pte()
Currently if copy_nonpresent_pte() returns a non-zero value it is assumed
to be a swap entry which requires further processing outside the loop in
copy_pte_range() after dropping locks. This prevents other values being
returned to signal conditions such as failure which a subsequent change
requires.
Instead make copy_nonpresent_pte() return an error code if further
processing is required and read the value for the swap entry in the main
loop under the ptl.
Link: https://lkml.kernel.org/r/20210616105937.23201-7-apopple@nvidia.com
Signed-off-by: Alistair Popple <apopple@nvidia.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/test_hmm.c')
0 files changed, 0 insertions, 0 deletions