[PATCH 04/14] mm/hmm: hmm_pfns_bad() was accessing wrong struct

[jglisse@redhat.com]

From: JA(C)rA'me Glisse <jglisse@redhat.com>

The private field of mm_walk struct point to an hmm_vma_walk struct and
not to the hmm_range struct desired. Fix to get proper struct pointer.

Signed-off-by: JA(C)rA'me Glisse <jglisse@redhat.com>
Cc: stable@vger.kernel.org
Cc: Evgeny Baskakov <ebaskakov@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Mark Hairgrove <mhairgrove@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
---
 mm/hmm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/hmm.c b/mm/hmm.c
index 6088fa6ed137..64d9e7dae712 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -293,7 +293,8 @@ static int hmm_pfns_bad(unsigned long addr,
 			unsigned long end,
 			struct mm_walk *walk)
 {
-	struct hmm_range *range = walk->private;
+	struct hmm_vma_walk *hmm_vma_walk = walk->private;
+	struct hmm_range *range = hmm_vma_walk->range;
 	hmm_pfn_t *pfns = range->pfns;
 	unsigned long i;
 
-- 
2.14.3