Patch series "fat: allocate multiple clusters in fallocate", v2. This series adds support for allocating multiple clusters in a single fat_add_clusters() call in fat_fallocate(). The multi-cluster TODO in inode.c is not implemented, as doing so would require speculative preallocation or an iomap conversion. This patch (of 3): fat_alloc_clusters() currently BUG()s when asked to allocate more than MAX_BUF_PER_PAGE / 2 clusters. This limit comes from the buffer_head array used to defer syncing and mirroring. Remove the allocation size limit by doing buffer_head batching like fat_free_clusters() does. Link: https://lore.kernel.org/20261012171106.146243-1-matheus.aalmeida@inf.ufrgs.br Link: https://lore.kernel.org/20261012171106.146243-2-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>