[patch 082/200] sparc: fix handling of page table constructor failure

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From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: sparc: fix handling of page table constructor failure

The page has just been allocated, so its refcount is 1.  free_unref_page()
is for use on pages which have a zero refcount.  Use __free_page() like
the other implementations of pte_alloc_one().

Link: https://lkml.kernel.org/r/20201125034655.27687-1-willy@xxxxxxxxxxxxx
Fixes: 1ae9ae5f7df7 ("sparc: handle pgtable_page_ctor() fail")
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Cc: David Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 arch/sparc/mm/init_64.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/sparc/mm/init_64.c~sparc-fix-handling-of-page-table-constructor-failure
+++ a/arch/sparc/mm/init_64.c
@@ -2894,7 +2894,7 @@ pgtable_t pte_alloc_one(struct mm_struct
 	if (!page)
 		return NULL;
 	if (!pgtable_pte_page_ctor(page)) {
-		free_unref_page(page);
+		__free_page(page);
 		return NULL;
 	}
 	return (pte_t *) page_address(page);
_




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