jfs: implement migrate_folio for jfs_metapage_aops

Add the missing migrate_folio operation to jfs_metapage_aops to fix
warnings during memory compaction.  These warnings were introduced by
commit 7ee3647243e5 ("migrate: Remove call to ->writepage") which added
explicit warnings when filesystems don't implement migrate_folio.

System reports following warnings:
  jfs_metapage_aops does not implement migrate_folio
  WARNING: CPU: 0 PID: 6870 at mm/migrate.c:955 fallback_migrate_folio mm/migrate.c:953 [inline]
  WARNING: CPU: 0 PID: 6870 at mm/migrate.c:955 move_to_new_folio+0x70e/0x840 mm/migrate.c:1007

Implement metapage_migrate_folio() which handles both single and multiple
metapages per page configurations.

[[email protected]: change comment style]
  Link: https://lkml.kernel.org/r/[email protected]
[[email protected]: fix build]
[[email protected]: remove redundant NULL check in __metapage_migrate_folio()]
  Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Fixes: 35474d52c605 ("jfs: Convert metapage_writepage to metapage_write_folio")
Signed-off-by: Shivank Garg <[email protected]>
Reported-by: [email protected]
Closes: https://lore.kernel.org/all/[email protected]
Tested-by: [email protected]
Cc: Alistair Popple <[email protected]>
Cc: Dave Kleikamp <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Donet Tom <[email protected]>
Cc: Jane Chu <[email protected]>
Cc: Kefeng Wang <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Zi Yan <[email protected]>
Cc: Dan Carpenter <[email protected]>
Cc: kernel test robot <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions