mm/gup: fix gup_pmd_range() for dax
authorYu Zhao <yuzhao@google.com>
Tue, 12 Feb 2019 23:35:58 +0000 (15:35 -0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 23 Mar 2019 19:09:46 +0000 (20:09 +0100)
commit8b1a7762e0dac5db42a003009fdcb425f10baa07
treefbde82f5e89199c25339ebe4efe509797f0e2ed6
parent6c023d86b3645fc2671bf2a7677fd208744edbb1
mm/gup: fix gup_pmd_range() for dax

[ Upstream commit 414fd080d125408cb15d04ff4907e1dd8145c8c7 ]

For dax pmd, pmd_trans_huge() returns false but pmd_huge() returns true
on x86.  So the function works as long as hugetlb is configured.
However, dax doesn't depend on hugetlb.

Link: http://lkml.kernel.org/r/20190111034033.601-1-yuzhao@google.com
Signed-off-by: Yu Zhao <yuzhao@google.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Keith Busch <keith.busch@intel.com>
Cc: "Michael S . Tsirkin" <mst@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: "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: Sasha Levin <sashal@kernel.org>
mm/gup.c