fs: remove prepare_write/commit_write

Nothing uses prepare_write or commit_write. Remove them from the tree
completely.

[akpm@linux-foundation.org: schedule simple_prepare_write() for unexporting]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 3f09cd8bcc38..5c4ee70d5cf3 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -40,8 +40,7 @@
  * Heinz Mauelshagen <mge@sistina.com>, Feb 2002
  *
  * Support for falling back on the write file operation when the address space
- * operations prepare_write and/or commit_write are not available on the
- * backing filesystem.
+ * operations write_begin is not available on the backing filesystem.
  * Anton Altaparmakov, 16 Feb 2005
  *
  * Still To Fix:
@@ -765,7 +764,7 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
                  */
                 if (!file->f_op->splice_read)
                         goto out_putf;
-                if (aops->prepare_write || aops->write_begin)
+                if (aops->write_begin)
                         lo_flags |= LO_FLAGS_USE_AOPS;
                 if (!(lo_flags & LO_FLAGS_USE_AOPS) && !file->f_op->write)
                         lo_flags |= LO_FLAGS_READ_ONLY;