[PATCH] use aio workqueue in fs/aio.c

From: William Lee Irwin III <wli@holomorphy.com>

Minor aio correction split off from suparna's patches:

Use the dedicated aio workqueue, not keventd, in order to isolate the rest
of the system from aio's demands.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/aio.c

@@ -608,7 +608,7 @@ void fastcall kick_iocb(struct kiocb *iocb)
 		spin_lock_irqsave(&ctx->ctx_lock, flags);
 		list_add_tail(&iocb->ki_run_list, &ctx->run_list);
 		spin_unlock_irqrestore(&ctx->ctx_lock, flags);
-		schedule_work(&ctx->wq);
+		queue_work(aio_wq, &ctx->wq);
 	}
 }