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authorMatthew Wilcox (Oracle) <willy@infradead.org>2023-03-27 18:10:50 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-04-19 02:29:46 +0300
commit957ebbdf434013ee01f29f6c9174eced995ebbe7 (patch)
treee6944d52b3630757fbb42ceafdb18bf214c88052 /mm/hugetlb.c
parent4519a254e0170c5d9d0b1054f045ec1f436c6336 (diff)
downloadlinux-957ebbdf434013ee01f29f6c9174eced995ebbe7.tar.xz
hugetlb: remove PageHeadHuge()
Sidhartha Kumar removed the last caller of PageHeadHuge(), so we can now remove it and make folio_test_hugetlb() the real implementation. Add kernel-doc for folio_test_hugetlb(). Link: https://lkml.kernel.org/r/20230327151050.1787744-1-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Sidhartha Kumar <sidhartha.kumar@oracle.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Muchun Song <songmuchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index a58b3739ed4b..7e4a80769c9e 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2050,19 +2050,23 @@ int PageHuge(struct page *page)
}
EXPORT_SYMBOL_GPL(PageHuge);
-/*
- * PageHeadHuge() only returns true for hugetlbfs head page, but not for
- * normal or transparent huge pages.
+/**
+ * folio_test_hugetlb - Determine if the folio belongs to hugetlbfs
+ * @folio: The folio to test.
+ *
+ * Context: Any context. Caller should have a reference on the folio to
+ * prevent it from being turned into a tail page.
+ * Return: True for hugetlbfs folios, false for anon folios or folios
+ * belonging to other filesystems.
*/
-int PageHeadHuge(struct page *page_head)
+bool folio_test_hugetlb(struct folio *folio)
{
- struct folio *folio = (struct folio *)page_head;
if (!folio_test_large(folio))
- return 0;
+ return false;
return folio->_folio_dtor == HUGETLB_PAGE_DTOR;
}
-EXPORT_SYMBOL_GPL(PageHeadHuge);
+EXPORT_SYMBOL_GPL(folio_test_hugetlb);
/*
* Find and lock address space (mapping) in write mode.