| From: David Howells <dhowells@redhat.com> |
| 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. |
| |
| [akpm@linux-foundation.org: s/EXPORT_SYMBOL/EXPORT_SYMBOL_GPL/, per Christoph] |
| Link: https://lkml.kernel.org/r/2494562.1646054576@warthog.procyon.org.uk |
| Link: https://lore.kernel.org/r/163707085314.3221130.14783857863702203440.stgit@warthog.procyon.org.uk/ |
| Signed-off-by: David Howells <dhowells@redhat.com> |
| Cc: Matthew Wilcox (Oracle) <willy@infradead.org> |
| Cc: Kirill A. Shutemov <kirill@shutemov.name> |
| Cc: Christoph Hellwig <hch@infradead.org> |
| Cc: Mike Kravetz <mike.kravetz@oracle.com> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| --- |
| |
| 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_GPL(PageHeadHuge); |
| |
| /* |
| * Find and lock address space (mapping) in write mode. |
| _ |
