tree dc604d28bc2ec4184671f1f239357e301b505e77
parent c628c4674d5912946aa2af6f68dcab52a9de49cd
author Wei Yang <richardw.yang@linux.intel.com> 1580451269 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1583909588 +0100

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

commit cb829624867b5ab10bc6a7036d183b1b82bfe9f8 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: e9b61f19858a ("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>