mm: zswap: use ATOMIC_LONG_INIT to initialize zswap_stored_pages

JIRA: https://issues.redhat.com/browse/RHEL-78135

commit ea6de4f
Author: Sun YangKai <sunk67188@gmail.com>
Date:   Wed Feb 26 23:32:43 2025 +0800

    mm: zswap: use ATOMIC_LONG_INIT to initialize zswap_stored_pages

    This is currently the only atomic_long_t variable initialized by
    ATOMIC_INIT macro found in the kernel by using `grep -r atomic_long_t |
    grep ATOMIC_INIT`

    This was introduced in 6e1fa55, in which we modified the type of
    zswap_stored_pages to atomic_long_t, but didn't change the initialization.

    Link: https://lkml.kernel.org/r/20250226153253.19179-1-sunk67188@gmail.com
    Fixes: 6e1fa55 ("mm: zswap: modify zswap_stored_pages to be atomic_long_t")
    Signed-off-by: Sun YangKai <sunk67188@gmail.com>
    Acked-by: Yosry Ahmed <yosry.ahmed@linux.dev>
    Acked-by: David Hildenbrand <david@redhat.com>
    Cc: Chengming Zhou <chengming.zhou@linux.dev>
    Cc: Johannes Weiner <hannes@cmpxchg.org>
    Cc: Kanchana P Sridhar <kanchana.p.sridhar@intel.com>
    Cc: Nhat Pham <nphamcs@gmail.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Luiz Capitulino <luizcap@redhat.com>

Author: luiz-cap

mm/zswap.c

@@ -43,7 +43,7 @@
 * statistics
 **********************************/
 /* The number of compressed pages currently stored in zswap */
-atomic_long_t zswap_stored_pages = ATOMIC_INIT(0);
+atomic_long_t zswap_stored_pages = ATOMIC_LONG_INIT(0);
 
 /*
  * The statistics below are not protected from concurrent access for