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mm/swap: remove unneeded p != NULL check in __swap_duplicate 

If p is NULL, __swap_duplicate will already return -EINVAL.  So if we
reach here, p must be non-NULL.

Link: https://lkml.kernel.org/r/20220509131416.17553-8-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: NeilBrown <neilb@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2022-05-19 14:08:51 -07:00 committed by akpm
parent f19c25684c
commit dab8dfff49
1 changed files with 1 additions and 2 deletions
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3
mm/swapfile.c
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@ -3333,8 +3333,7 @@ static int __swap_duplicate(swp_entry_t entry, unsigned char usage)
unlock_out:
unlock_cluster_or_swap_info(p, ci);
if (p)
put_swap_device(p);
put_swap_device(p);
return err;
}