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authorPaul E. McKenney <paul.mckenney@linaro.org>2011-04-03 21:33:51 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-05-05 23:16:56 -0700
commit4a29865689dbb87a02e3b0fff4a4ae5041273173 (patch)
tree72c9f1641a9fb05e3ae4d8cc068f62f9c566bae9 /kernel/rcutree_trace.c
parentd71df90eadfc35aa549ff9a850842673febca71f (diff)
downloadlinaro-lsk-4a29865689dbb87a02e3b0fff4a4ae5041273173.tar.gz
rcu: make rcutorture version numbers available through debugfs
It is not possible to accurately correlate rcutorture output with that of debugfs. This patch therefore adds a debugfs file that prints out the rcutorture version number, permitting easy correlation. Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutree_trace.c')
-rw-r--r--kernel/rcutree_trace.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index fc40e89a028..3baa235786b 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -394,6 +394,29 @@ static const struct file_operations rcu_pending_fops = {
.release = single_release,
};
+static int show_rcutorture(struct seq_file *m, void *unused)
+{
+ seq_printf(m, "rcutorture test sequence: %lu %s\n",
+ rcutorture_testseq >> 1,
+ (rcutorture_testseq & 0x1) ? "(test in progress)" : "");
+ seq_printf(m, "rcutorture update version number: %lu\n",
+ rcutorture_vernum);
+ return 0;
+}
+
+static int rcutorture_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, show_rcutorture, NULL);
+}
+
+static const struct file_operations rcutorture_fops = {
+ .owner = THIS_MODULE,
+ .open = rcutorture_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static struct dentry *rcudir;
static int __init rcutree_trace_init(void)
@@ -430,6 +453,11 @@ static int __init rcutree_trace_init(void)
NULL, &rcu_pending_fops);
if (!retval)
goto free_out;
+
+ retval = debugfs_create_file("rcutorture", 0444, rcudir,
+ NULL, &rcutorture_fops);
+ if (!retval)
+ goto free_out;
return 0;
free_out:
debugfs_remove_recursive(rcudir);