The patch titled
Subject: mm/hugetlb.c: export PageHeadHuge()
has been added to the -mm tree. Its filename is
mm-export-pageheadhuge.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-export-pageheadhuge.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-export-pageheadhuge.patch
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------------------------------------------------------
From: David Howells <dhowells@xxxxxxxxxx>
Subject: mm/hugetlb.c: export PageHeadHuge()
Export PageHeadHuge() - it's used by folio_test_hugetlb() and thence by
such as folio_file_page() and folio_contains(). Matthew suggested I use
the first of those instead of doing the same calculation manually - but I
can't call it from a module.
Kirill suggested rearranging things to put it in a header, but that
introduces header dependencies because of where constants are defined.
Link: https://lkml.kernel.org/r/2494562.1646054576@xxxxxxxxxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/163707085314.3221130.14783857863702203440.stgit@xxxxxxxxxxxxxxxxxxxxxx/
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill@xxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/hugetlb.c~mm-export-pageheadhuge
+++ a/mm/hugetlb.c
@@ -1855,6 +1855,7 @@ int PageHeadHuge(struct page *page_head)
return page_head[1].compound_dtor == HUGETLB_PAGE_DTOR;
}
+EXPORT_SYMBOL(PageHeadHuge);
/*
* Find and lock address space (mapping) in write mode.
_
Patches currently in -mm which might be from dhowells@xxxxxxxxxx are
mm-export-pageheadhuge.patch
mutex-subsystem-synchro-test-module.patch
