mm/z3fold: remove confusing local variable l reassignment

The local variable l holds the address of unbuddied[i] which won't change
after we take the pool lock.  Remove it to avoid confusion.

Link: https://lkml.kernel.org/r/20220308134311.59086-6-linmiaohe@huawei.comSigned-off-by: NMiaohe Lin <linmiaohe@huawei.com>
Reviewed-by: NVitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>

mm/z3fold.c

@@ -876,7 +876,6 @@ static inline struct z3fold_header *__z3fold_alloc(struct z3fold_pool *pool,
 
 		/* Re-check under lock. */
 		spin_lock(&pool->lock);
-		l = &unbuddied[i];
 		if (unlikely(zhdr != list_first_entry(READ_ONCE(l),
 						struct z3fold_header, buddy)) ||
 		    !z3fold_page_trylock(zhdr)) {