rcu: split 'rcubarrier' to each flavor

This patch add new 'rcubarrier' to each flavor's folder, now we could use:
	'cat /debugfs/rcu/rsp/rcubarrier'
to get the selected rsp info.

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

1 files changed, 27 insertions, 0 deletions

diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index 3312ed7e411e..65b6265531ff 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -103,6 +103,28 @@ static const struct file_operations rcubarrier_fops = {
         .release = single_release,
 };
 
+static int new_show_rcubarrier(struct seq_file *m, void *v)
+{
+        struct rcu_state *rsp = (struct rcu_state *)m->private;
+        seq_printf(m, "bcc: %d nbd: %lu\n",
+                   atomic_read(&rsp->barrier_cpu_count),
+                   rsp->n_barrier_done);
+        return 0;
+}
+
+static int new_rcubarrier_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, new_show_rcubarrier, inode->i_private);
+}
+
+static const struct file_operations new_rcubarrier_fops = {
+        .owner = THIS_MODULE,
+        .open = new_rcubarrier_open,
+        .read = seq_read,
+        .llseek = no_llseek,
+        .release = seq_release,
+};
+
 #ifdef CONFIG_RCU_BOOST
 
 static char convert_kthread_status(unsigned int kthread_status)
@@ -432,6 +454,11 @@ static int __init rcutree_trace_init(void)
                                         rspdir, rsp, &rcu_pending_fops);
                         if (!retval)
                                 goto free_out;
+
+                        retval = debugfs_create_file("rcubarrier", 0444,
+                                        rspdir, rsp, &new_rcubarrier_fops);
+                        if (!retval)
+                                goto free_out;
         }
 
         retval = debugfs_create_file("rcubarrier", 0444, rcudir,