block: Remove bdrv_(set_)enable_write_cache()

The only remaining users were block jobs (mirror and backup) which
unconditionally enabled WCE on the BlockBackend of the target image. As
these block jobs don't go through BlockBackend for their I/O requests,
they aren't affected by this setting anyway but always get a writeback
mode, so that call can be removed.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>

1 files changed, 0 insertions, 16 deletions

diff --git a/block.c b/block.c
index 7ff4fcb..d36eb75 100644
--- a/block.c
+++ b/block.c
@@ -2695,22 +2695,6 @@ int bdrv_is_sg(BlockDriverState *bs)
     return bs->sg;
 }
 
-int bdrv_enable_write_cache(BlockDriverState *bs)
-{
-    if (bs->blk) {
-        return blk_enable_write_cache(bs->blk);
-    } else {
-        return true;
-    }
-}
-
-void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce)
-{
-    if (bs->blk) {
-        blk_set_enable_write_cache(bs->blk, wce);
-    }
-}
-
 int bdrv_is_encrypted(BlockDriverState *bs)
 {
     if (bs->backing && bs->backing->bs->encrypted) {