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sparc: fix handling of page table constructor failure 

[ Upstream commit 06517c9a33 ]

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@infradead.org
Fixes: 1ae9ae5f7d ("sparc: handle pgtable_page_ctor() fail")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: David Miller <davem@davemloft.net>
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>
5.4-rM2-2.2.x-imx-squashed
Matthew Wilcox (Oracle) 2020-12-14 19:07:59 -08:00 committed by Greg Kroah-Hartman
parent 6ef298e1ce
commit c3bf90c6aa
1 changed files with 1 additions and 1 deletions
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2
arch/sparc/mm/init_64.c
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@ -2904,7 +2904,7 @@ pgtable_t pte_alloc_one(struct mm_struct *mm)
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);