block: Rename qemu_aio_release -> qemu_aio_unref

Suggested-by: BenoƮt Canet <benoit.canet@irqsave.net>
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/block.c b/block.c
index 3a3648d..a857913 100644
--- a/block.c
+++ b/block.c
@@ -4651,7 +4651,7 @@
             abort();
         }
     }
-    qemu_aio_release(acb);
+    qemu_aio_unref(acb);
 }
 
 /* Async version of aio cancel. The caller is not blocked if the acb implements
@@ -4692,7 +4692,7 @@
     acb->common.cb(acb->common.opaque, acb->ret);
     qemu_bh_delete(acb->bh);
     acb->bh = NULL;
-    qemu_aio_release(acb);
+    qemu_aio_unref(acb);
 }
 
 static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs,
@@ -4760,7 +4760,7 @@
     acb->common.cb(acb->common.opaque, acb->req.error);
 
     qemu_bh_delete(acb->bh);
-    qemu_aio_release(acb);
+    qemu_aio_unref(acb);
 }
 
 /* Invoke bdrv_co_do_readv/bdrv_co_do_writev */
@@ -4891,7 +4891,7 @@
     acb->refcnt++;
 }
 
-void qemu_aio_release(void *p)
+void qemu_aio_unref(void *p)
 {
     BlockDriverAIOCB *acb = p;
     assert(acb->refcnt > 0);