diff options
| author | Zi Yan <ziy@nvidia.com> | 2023-09-13 23:12:48 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-04 20:32:29 +0300 |
| commit | aa5fe31b6b59210cb4ea28a59e68781f48eeca74 (patch) | |
| tree | 473fbd6d39eaf3775c42f4e48c04245aa4edbc6a /mm/damon | |
| parent | 8db0ec791f7788cd21e7f91ee5ff42c1c458d0e7 (diff) | |
| download | linux-aa5fe31b6b59210cb4ea28a59e68781f48eeca74.tar.xz | |
mips: use nth_page() in place of direct struct page manipulation
__flush_dcache_pages() is called during hugetlb migration via
migrate_pages() -> migrate_hugetlbs() -> unmap_and_move_huge_page() ->
move_to_new_folio() -> flush_dcache_folio(). And with hugetlb and without
sparsemem vmemmap, struct page is not guaranteed to be contiguous beyond a
section. Use nth_page() instead.
Without the fix, a wrong address might be used for data cache page flush.
No bug is reported. The fix comes from code inspection.
Link: https://lkml.kernel.org/r/20230913201248.452081-6-zi.yan@sent.com
Fixes: 15fa3e8e3269 ("mips: implement the new page table range API")
Signed-off-by: Zi Yan <ziy@nvidia.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/damon')
0 files changed, 0 insertions, 0 deletions