>From 9d47f1dd70a19b78a9da53e71fc1bf41e0300026 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@xxxxxxxxxx>
Date: Fri, 28 Jun 2013 21:08:27 -0700
rebind_subsystems() performs santiy checks even on subsystems which
aren't specified to be added or removed and the checks aren't all that
useful given that these are in a very cold path while the violations
they check would trip up in much hotter paths.
Let's remove these from rebind_subsystems().
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
---
kernel/cgroup.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index a65aff1..864a4b2 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1071,15 +1071,6 @@ static int rebind_subsystems(struct cgroupfs_root *root,
/* subsystem is now free - drop reference on module */
module_put(ss->module);
root->subsys_mask &= ~bit;
- } else if (bit & root->subsys_mask) {
- /* Subsystem state should already exist */
- BUG_ON(!cgrp->subsys[i]);
-#ifdef CONFIG_MODULE_UNLOAD
- BUG_ON(ss->module && !module_refcount(ss->module));
-#endif
- } else {
- /* Subsystem state shouldn't exist */
- BUG_ON(cgrp->subsys[i]);
}
}
--
1.8.3.1
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