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author | Peter Xu <peterx@redhat.com> | 2024-03-27 18:23:28 +0300 |
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committer | Andrew Morton <akpm@linux-foundation.org> | 2024-04-26 06:56:22 +0300 |
commit | caf8cab7985794d7cc8b85143b11e258ea5c8a44 (patch) | |
tree | a03a5f232b50cff7d9a36cd45f371860ced9b3d8 /samples | |
parent | 878b0c4516210b613468fea827f4cc0f71b87970 (diff) | |
download | linux-caf8cab7985794d7cc8b85143b11e258ea5c8a44.tar.xz |
mm/gup: cache *pudp in follow_pud_mask()
Introduce "pud_t pud" in the function, so the code won't dereference *pudp
multiple time. Not only because that looks less straightforward, but also
because if the dereference really happened, it's not clear whether there
can be race to see different *pudp values if it's being modified at the
same time.
Link: https://lkml.kernel.org/r/20240327152332.950956-10-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Acked-by: James Houghton <jthoughton@google.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Ryan Roberts <ryan.roberts@arm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andrew Jones <andrew.jones@linux.dev>
Cc: Aneesh Kumar K.V (IBM) <aneesh.kumar@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: "Mike Rapoport (IBM)" <rppt@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Rik van Riel <riel@surriel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'samples')
0 files changed, 0 insertions, 0 deletions