[PATCH] z3fold: fix spinlock unlocking in page reclaim

[Vitaly Wool]

The patch "z3fold: add kref refcounting" introduced a bug in
z3fold_reclaim_page() with function exit that may leave pool->lock
spinlock held. Here comes the trivial fix.

Reported-by: Alexey Khoroshilov <khoroshi...@ispras.ru>
Signed-off-by: Vitaly Wool <vitalyw...@gmail.com>
---
 mm/z3fold.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/z3fold.c b/mm/z3fold.c
index 8970a2f..f9492bc 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -667,6 +667,7 @@ static int z3fold_reclaim_page(struct z3fold_pool *pool, 
unsigned int retries)
                        z3fold_page_unlock(zhdr);
                        spin_lock(&pool->lock);
                        if (kref_put(&zhdr->refcount, release_z3fold_page)) {
+                               spin_unlock(&pool->lock);
                                atomic64_dec(&pool->pages_nr);
                                return 0;
                        }
-- 
2.5.0