mm, swap: remove redundant arguments and locking for enabling a device

mm, swap: remove redundant arguments and locking for enabling a device

There is no need to repeatedly pass zero map and priority values.  zeromap
is similar to cluster info and swap_map, which are only used once the swap
device is exposed.  And the prio values are currently read only once set,
and only used for the list insertion upon expose or swap info display.

Link: https://lkml.kernel.org/r/20260218-swap-table-p3-v3-3-f4e34be021a7@tencent.com
Signed-off-by: Kairui Song <kasong@tencent.com>
Acked-by: Chris Li <chrisl@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kairui Song <ryncsn@gmail.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: kernel test robot <lkp@intel.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>