mm/huge_memory: convert has_hwpoisoned into a pure folio flag

Patch series "mm: hugetlb+THP folio and migration cleanups", v2.

Some cleanups around more folio conversion and migration handling that I
collected working on random stuff.

This patch (of 6):

Let's stop setting it on pages, there is no need to anymore.

Link: https://lkml.kernel.org/r/20250113131611.2554758-2-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 330929b..616b57d 100644 (file)
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -906,11 +906,9 @@ TESTPAGEFLAG_FALSE(TransCompound, transcompound)
  *
  * This flag is set by hwpoison handler.  Cleared by THP split or free page.
  */
-PAGEFLAG(HasHWPoisoned, has_hwpoisoned, PF_SECOND)
-       TESTSCFLAG(HasHWPoisoned, has_hwpoisoned, PF_SECOND)
+FOLIO_FLAG(has_hwpoisoned, FOLIO_SECOND_PAGE)
 #else
-PAGEFLAG_FALSE(HasHWPoisoned, has_hwpoisoned)
-       TESTSCFLAG_FALSE(HasHWPoisoned, has_hwpoisoned)
+FOLIO_FLAG_FALSE(has_hwpoisoned)
 #endif
 
 /*

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 2654a95..3d3ebdc 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -3290,7 +3290,7 @@ static void __split_huge_page(struct page *page, struct list_head *list,
        /* lock lru list/PageCompound, ref frozen by page_ref_freeze */
        lruvec = folio_lruvec_lock(folio);
 
-       ClearPageHasHWPoisoned(head);
+       folio_clear_has_hwpoisoned(folio);
 
        for (i = nr - new_nr; i >= new_nr; i -= new_nr) {
                struct folio *tail;