mm/memory-failure: convert __get_huge_page_for_hwpoison() to folios

Patch series "convert hugepage memory failure functions to folios".

This series contains a 1:1 straightforward page to folio conversion for
memory failure functions which deal with huge pages.  I renamed a few
functions to fit with how other folio operating functions are named. 
These include:

hugetlb_clear_page_hwpoison -> folio_clear_hugetlb_hwpoison
free_raw_hwp_pages -> folio_free_raw_hwp
__free_raw_hwp_pages -> __folio_free_raw_hwp
hugetlb_set_page_hwpoison -> folio_set_hugetlb_hwpoison

The goal of this series was to reduce users of the hugetlb specific page
flag macros which take in a page so users are protected by the compiler to
make sure they are operating on a head page.


This patch (of 8):

Use a folio throughout the function rather than using a head page.  This
also reduces the users of the page version of hugetlb specific page flags.

Link: https://lkml.kernel.org/r/20230112204608.80136-2-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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