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/[email protected]
Signed-off-by: Sidhartha Kumar <[email protected]>
Acked-by: Naoya Horiguchi <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Miaohe Lin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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