[Qemu-devel] [PATCH] block: Remove bdrv_make_anon()

[Kevin Wolf <kwolf@redhat.com>]

The call in hmp_drive_del() is dead code because blk_remove_bs() is
called a few lines above. The only other remaining user is
bdrv_delete(), which only abuses bdrv_make_anon() to remove it from the
named nodes list. This path inlines the list entry removal into
bdrv_delete() and removes bdrv_make_anon().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block.c               | 15 +++------------
 blockdev.c            |  3 ---
 include/block/block.h |  1 -
 3 files changed, 3 insertions(+), 16 deletions(-)

diff --git a/block.c b/block.c
index b4107fc..e0b280b 100644
--- a/block.c
+++ b/block.c
@@ -2241,16 +2241,6 @@ void bdrv_close_all(void)
     }
 }
 
-/* make a BlockDriverState anonymous by removing from graph_bdrv_state list.
- * Also, NULL terminate the device_name to prevent double remove */
-void bdrv_make_anon(BlockDriverState *bs)
-{
-    if (bs->node_name[0] != '\0') {
-        QTAILQ_REMOVE(&graph_bdrv_states, bs, node_list);
-    }
-    bs->node_name[0] = '\0';
-}
-
 /* Fields that need to stay with the top-level BDS */
 static void bdrv_move_feature_fields(BlockDriverState *bs_dest,
                                      BlockDriverState *bs_src)
@@ -2380,8 +2370,9 @@ static void bdrv_delete(BlockDriverState *bs)
     bdrv_close(bs);
 
     /* remove from list, if necessary */
-    bdrv_make_anon(bs);
-
+    if (bs->node_name[0] != '\0') {
+        QTAILQ_REMOVE(&graph_bdrv_states, bs, node_list);
+    }
     QTAILQ_REMOVE(&all_bdrv_states, bs, bs_list);
 
     g_free(bs);
diff --git a/blockdev.c b/blockdev.c
index 85dee57..a9118c8 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -2867,9 +2867,6 @@ void hmp_drive_del(Monitor *mon, const QDict *qdict)
 
     /* Make the BlockBackend and the attached BlockDriverState anonymous */
     monitor_remove_blk(blk);
-    if (blk_bs(blk)) {
-        bdrv_make_anon(blk_bs(blk));
-    }
 
     /* If this BlockBackend has a device attached to it, its refcount will be
      * decremented when the device is removed; otherwise we have to do so here.
diff --git a/include/block/block.h b/include/block/block.h
index 01349ef..4adb1e9 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -201,7 +201,6 @@ int bdrv_create(BlockDriver *drv, const char* filename,
 int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp);
 BlockDriverState *bdrv_new_root(void);
 BlockDriverState *bdrv_new(void);
-void bdrv_make_anon(BlockDriverState *bs);
 void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top);
 void bdrv_replace_in_backing_chain(BlockDriverState *old,
                                    BlockDriverState *new);
-- 
1.8.3.1