[RFC PATCH 5/9] jfs: Remove old direct_IO support

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

Now that reads and writes both use iomap for O_DIRECT, this code has
no more callers and can be removed.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 fs/jfs/inode.c | 27 +--------------------------
 1 file changed, 1 insertion(+), 26 deletions(-)

diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 22e8a5612fdc..63690020cc46 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -368,31 +368,6 @@ static sector_t jfs_bmap(struct address_space *mapping, sector_t block)
 	return generic_block_bmap(mapping, block, jfs_get_block);
 }
 
-static ssize_t jfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
-{
-	struct file *file = iocb->ki_filp;
-	struct address_space *mapping = file->f_mapping;
-	struct inode *inode = file->f_mapping->host;
-	size_t count = iov_iter_count(iter);
-	ssize_t ret;
-
-	ret = blockdev_direct_IO(iocb, inode, iter, jfs_get_block);
-
-	/*
-	 * In case of error extending write may have instantiated a few
-	 * blocks outside i_size. Trim these off again.
-	 */
-	if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
-		loff_t isize = i_size_read(inode);
-		loff_t end = iocb->ki_pos + count;
-
-		if (end > isize)
-			jfs_write_failed(mapping, end);
-	}
-
-	return ret;
-}
-
 const struct address_space_operations jfs_aops = {
 	.dirty_folio	= block_dirty_folio,
 	.invalidate_folio = block_invalidate_folio,
@@ -403,7 +378,7 @@ const struct address_space_operations jfs_aops = {
 	.write_begin	= jfs_write_begin,
 	.write_end	= nobh_write_end,
 	.bmap		= jfs_bmap,
-	.direct_IO	= jfs_direct_IO,
+	.direct_IO	= noop_direct_IO,
 };
 
 /*
-- 
2.34.1