Re: [PATCH] mm: Make copy_huge_page() always available

[Mike Kravetz]

On 7/12/21 8:32 AM, Matthew Wilcox (Oracle) wrote:
> Rewrite copy_huge_page() and move it into mm/util.c so it's always
> available.  Fixes an exposure of uninitialised memory on configurations
> with HUGETLB and UFFD enabled and MIGRATION disabled.
> 
> Fixes: 8cc5fcbb5be8 ("mm, hugetlb: fix racy resv_huge_pages underflow on UFFDIO_COPY")
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
> ---
>  include/linux/migrate.h |  5 -----
>  include/linux/mm.h      |  1 +
>  mm/migrate.c            | 48 -----------------------------------------
>  mm/util.c               | 10 +++++++++
>  4 files changed, 11 insertions(+), 53 deletions(-)

Thanks Matthew,

Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
-- 
Mike Kravetz