commit b666d239509a0855740444c254a65cbf567bfb90
author Kevin Wolf <kwolf@redhat.com> Wed May 05 11:44:39 2010 +0200
committer Kevin Wolf <kwolf@redhat.com> Mon May 17 10:20:05 2010 +0200
tree e8d2539f1ad8d0c9578974bfe74fb5ad3b5008e4
parent 7a6f391376c61af1dce2d624a4fcff8eec4fa097

block: Avoid unchecked casts for AIOCBs

Use container_of for one direction and &acb->common for the other one.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block.c

diff --git a/block.c b/block.c
index 48305b7..6345599 100644
--- a/block.c
+++ b/block.c
@@ -2108,7 +2108,8 @@
 
 static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb)
 {
-    BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb;
+    BlockDriverAIOCBSync *acb =
+        container_of(blockacb, BlockDriverAIOCBSync, common);
     qemu_bh_delete(acb->bh);
     acb->bh = NULL;
     qemu_aio_release(acb);