[Nouveau] [PATCH 09/15] mm: don't abuse pte_index() in hmm_vma_handle_pmd

[Christoph Hellwig]

pte_index is an internal arch helper in various architectures,
without consistent semantics.  Open code that calculation of a PMD
index based on the virtual address instead.

Signed-off-by: Christoph Hellwig <hch at lst.de>
---
 mm/hmm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/hmm.c b/mm/hmm.c
index 03d37e102e3b..2083e4db46f5 100644
--- a/mm/hmm.c
+++ b/mm/hmm.c
@@ -486,7 +486,7 @@ static int hmm_vma_handle_pmd(struct mm_walk *walk,
 	if (pmd_protnone(pmd) || fault || write_fault)
 		return hmm_vma_walk_hole_(addr, end, fault, write_fault, walk);
 
-	pfn = pmd_pfn(pmd) + pte_index(addr);
+	pfn = pmd_pfn(pmd) + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
 	for (i = 0; addr < end; addr += PAGE_SIZE, i++, pfn++) {
 		if (pmd_devmap(pmd)) {
 			pgmap = get_dev_pagemap(pfn, pgmap);
-- 
2.20.1