From: Neeraj Upadhyay <neeraju@codeaurora.org>
Date: Fri, 29 Mar 2019 09:55:52 +0000 (+0530)
Subject: rcu: Dump specified number of blocked tasks
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=cd6d17b4a4646d4bf2568f3a4de13a5a13e2ed28;p=linux.git

rcu: Dump specified number of blocked tasks

The dump_blkd_tasks() function dumps at most 10 blocked tasks, ignoring
the value of the ncheck parameter.  This commit therefore substitutes
the value of ncheck for the hard-coded value of 10.  Because all callers
currently pass 10 as the number, this patch does not change behavior,
but it is clearly an accident waiting to happen.

Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
---

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 1102765f91fd1..3a9891a74ead8 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -760,7 +760,7 @@ dump_blkd_tasks(struct rcu_node *rnp, int ncheck)
 	i = 0;
 	list_for_each(lhp, &rnp->blkd_tasks) {
 		pr_cont(" %p", lhp);
-		if (++i >= 10)
+		if (++i >= ncheck)
 			break;
 	}
 	pr_cont("\n");