Commit cb829624 authored by Wei Yang's avatar Wei Yang Committed by Linus Torvalds

mm/huge_memory.c: use head to check huge zero page

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: e9b61f19 ("thp: reintroduce split_huge_page()")
Signed-off-by: default avatarWei Yang <richardw.yang@linux.intel.com>
Acked-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8a7ff02a
...@@ -2712,7 +2712,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) ...@@ -2712,7 +2712,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
unsigned long flags; unsigned long flags;
pgoff_t end; pgoff_t end;
VM_BUG_ON_PAGE(is_huge_zero_page(page), page); VM_BUG_ON_PAGE(is_huge_zero_page(head), head);
VM_BUG_ON_PAGE(!PageLocked(page), page); VM_BUG_ON_PAGE(!PageLocked(page), page);
VM_BUG_ON_PAGE(!PageCompound(page), page); VM_BUG_ON_PAGE(!PageCompound(page), page);
......
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