Drivers: hv: balloon: Make the balloon driver not unloadable

The balloon driver is stateful. For instance, it needs to keep track of pages that have been ballooned out to properly post pressure reports. This state cannot be re-constructed if the driver were to be unloaded and subsequently loaded. Furthermore, as we support memory hot-add as part of this driver, this driver becomes even more stateful and this state cannot be re-created. Make the balloon driver unloadable to deal with this issue. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
nomis · Mar 15, 2013 · 0cf40a3 · 0cf40a3
1 parent c51af82
commit 0cf40a3
Showing 1 changed file with 0 additions and 7 deletions.
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
@@ -1096,14 +1096,7 @@ static int __init init_balloon_drv(void)
 	return vmbus_driver_register(&balloon_drv);
 }
 
-static void exit_balloon_drv(void)
-{
-
-	vmbus_driver_unregister(&balloon_drv);
-}
-
 module_init(init_balloon_drv);
-module_exit(exit_balloon_drv);
 
 MODULE_DESCRIPTION("Hyper-V Balloon");
 MODULE_VERSION(HV_DRV_VERSION);