From: Michael Wang <wangyun@linux.vnet.ibm.com>
Date: Thu, 20 Sep 2012 00:51:02 +0000 (+0800)
Subject: rcu: Create directory for each flavor of rcu
X-Git-Tag: next-20121024~29^2^2~13
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b1135aec637c3b86d8a94e96b04c24c276dde387;p=karo-tx-linux.git

rcu: Create directory for each flavor of rcu

This patch will create subdirectory according to each flavor of rcu, the new
structure will be:

	/debugfs/rcu/ -> rsp_0
		      -> rsp_1
		      -> ...

So we can go to '/debugfs/rcu/rsp_0' and get the cpu info of rsp_0 there.
The flavors of RCU are currently rcu_bh, rcu_preempt, and rcu_sched.

Signed-off-by: Michael Wang <wangyun@linux.vnet.ibm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index 693513bc50e6..62223a27f985 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -446,12 +446,20 @@ static struct dentry *rcudir;
 
 static int __init rcutree_trace_init(void)
 {
+	struct rcu_state *rsp;
 	struct dentry *retval;
+	struct dentry *rspdir;
 
 	rcudir = debugfs_create_dir("rcu", NULL);
 	if (!rcudir)
 		goto free_out;
 
+	for_each_rcu_flavor(rsp) {
+		rspdir = debugfs_create_dir(rsp->name, rcudir);
+		if (!rspdir)
+			goto free_out;
+	}
+
 	retval = debugfs_create_file("rcubarrier", 0444, rcudir,
 						NULL, &rcubarrier_fops);
 	if (!retval)