aio: introduce AioContext, move bottom halves there

Start introducing AioContext, which will let us remove globals from
aio.c/async.c, and introduce multiple I/O threads.

The bottom half functions now take an additional AioContext argument.
A bottom half is created with a specific AioContext that remains the
same throughout the lifetime.  qemu_bh_new is just a wrapper that
uses a global context.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/aio.c b/aio.c
index 44214e1ffc..7e3fe708d2 100644
--- a/aio.c
+++ b/aio.c
@@ -18,8 +18,6 @@
 #include "qemu-queue.h"
 #include "qemu_socket.h"
 
-typedef struct AioHandler AioHandler;
-
 /* The list of registered AIO handlers */
 static QLIST_HEAD(, AioHandler) aio_handlers;