diff options
| author |   Doug Berger <opendmb@gmail.com> | 2022-09-14 12:09:17 -0700 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2022-09-26 12:14:34 -0700 |
| commit | 317314527d173e1f139ceaf8cb87cb1746abf240 (patch) | |
| tree | f244845d33ab1e283634f49a5ef224ee85aa2700 /scripts/generate_rust_analyzer.py | |
| parent | mm: prevent page_frag_alloc() from corrupting the memory (diff) | |
| download | linux-dev-317314527d173e1f139ceaf8cb87cb1746abf240.tar.xz linux-dev-317314527d173e1f139ceaf8cb87cb1746abf240.zip | |
mm/hugetlb: correct demote page offset logic
With gigantic pages it may not be true that struct page structures are
contiguous across the entire gigantic page. The nth_page macro is used
here in place of direct pointer arithmetic to correct for this.
Mike said:
: This error could cause addressing exceptions. However, this is only
: possible in configurations where CONFIG_SPARSEMEM &&
: !CONFIG_SPARSEMEM_VMEMMAP. Such a configuration option is rare and
: unknown to be the default anywhere.
Link: https://lkml.kernel.org/r/20220914190917.3517663-1-opendmb@gmail.com
Fixes: 8531fc6f52f5 ("hugetlb: add hugetlb demote page support")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'scripts/generate_rust_analyzer.py')
0 files changed, 0 insertions, 0 deletions