block: remove blkdev_write_begin() and blkdev_write_end()

Remove blkdev_write_begin(), blkdev_write_end(), and their entries in
def_blk_aops. These have been unreachable since commit 487c607df790
("block: use iomap for writes to block devices") switched block device
buffered writes from generic_perform_write() to
iomap_file_buffered_write(), which bypasses aops->write_begin/end.

Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260525-blk-write-cleanup-v1-1-391c073e3831@columbia.edu
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/fops.c b/block/fops.c
index bb6642b45937cec2ce63be592bd5dc42b23985cd..ffe7b2042f4e2f4fee2e4be5bf954cd11fa85e11 100644 (file)
--- a/block/fops.c
+++ b/block/fops.c
@@ -499,36 +499,12 @@ static void blkdev_readahead(struct readahead_control *rac)
        mpage_readahead(rac, blkdev_get_block);
 }
 
-static int blkdev_write_begin(const struct kiocb *iocb,
-                             struct address_space *mapping, loff_t pos,
-                             unsigned len, struct folio **foliop,
-                             void **fsdata)
-{
-       return block_write_begin(mapping, pos, len, foliop, blkdev_get_block);
-}
-
-static int blkdev_write_end(const struct kiocb *iocb,
-                           struct address_space *mapping,
-                           loff_t pos, unsigned len, unsigned copied,
-                           struct folio *folio, void *fsdata)
-{
-       int ret;
-       ret = block_write_end(pos, len, copied, folio);
-
-       folio_unlock(folio);
-       folio_put(folio);
-
-       return ret;
-}
-
 const struct address_space_operations def_blk_aops = {
        .dirty_folio    = block_dirty_folio,
        .invalidate_folio = block_invalidate_folio,
        .read_folio     = blkdev_read_folio,
        .readahead      = blkdev_readahead,
        .writepages     = blkdev_writepages,
-       .write_begin    = blkdev_write_begin,
-       .write_end      = blkdev_write_end,
        .migrate_folio  = buffer_migrate_folio_norefs,
        .is_dirty_writeback = buffer_check_dirty_writeback,
 };