fs: don't allow to complete sync iocbs through aio_complete

The AIO interface is fairly complex because it tries to allow
filesystems to always work async and then wakeup a synchronous
caller through aio_complete.  It turns out that basically no one
was doing this to avoid the complexity and context switches,
and we've already fixed up the remaining users and can now
get rid of this case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 3 insertions, 6 deletions

diff --git a/net/socket.c b/net/socket.c
index f92145554f34..f6c519d7b3ba 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -633,8 +633,7 @@ static int do_sock_sendmsg(struct socket *sock, struct msghdr *msg,
         init_sync_kiocb(&iocb, NULL);
         ret = nosec ? __sock_sendmsg_nosec(&iocb, sock, msg, size) :
                       __sock_sendmsg(&iocb, sock, msg, size);
-        if (-EIOCBQUEUED == ret)
-                ret = wait_on_sync_kiocb(&iocb);
+        BUG_ON(ret == -EIOCBQUEUED);
         return ret;
 }
 
@@ -766,8 +765,7 @@ int sock_recvmsg(struct socket *sock, struct msghdr *msg,
 
         init_sync_kiocb(&iocb, NULL);
         ret = __sock_recvmsg(&iocb, sock, msg, size, flags);
-        if (-EIOCBQUEUED == ret)
-                ret = wait_on_sync_kiocb(&iocb);
+        BUG_ON(ret == -EIOCBQUEUED);
         return ret;
 }
 EXPORT_SYMBOL(sock_recvmsg);
@@ -780,8 +778,7 @@ static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
 
         init_sync_kiocb(&iocb, NULL);
         ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags);
-        if (-EIOCBQUEUED == ret)
-                ret = wait_on_sync_kiocb(&iocb);
+        BUG_ON(ret == -EIOCBQUEUED);
         return ret;
 }