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mm/huge_memory.c: use head to check huge zero page
commitcb82962486
upstream. The page could be a tail page, if this is the case, this BUG_ON will never be triggered. Link: http://lkml.kernel.org/r/20200110032610.26499-1-richardw.yang@linux.intel.com Fixes:e9b61f1985
("thp: reintroduce split_huge_page()") Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -2712,7 +2712,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
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unsigned long flags;
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pgoff_t end;
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VM_BUG_ON_PAGE(is_huge_zero_page(page), page);
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VM_BUG_ON_PAGE(is_huge_zero_page(head), head);
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VM_BUG_ON_PAGE(!PageLocked(page), page);
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VM_BUG_ON_PAGE(!PageCompound(page), page);
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