fat_add_cluster() currently adds only one cluster to a file's chain, requiring multiple calls when adding more clusters. Add a fat_alloc_chain() helper that allocates a cluster chain but only returns the first cluster. Extend fat_add_cluster() to add multiple clusters in a single call and rename it to fat_add_clusters() to reflect the new behavior. Link: https://lore.kernel.org/20261012171106.146243-3-matheus.aalmeida@inf.ufrgs.br Signed-off-by: Matheus Alves de Almeida <matheus.aalmeida@inf.ufrgs.br> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>