linux-kernel - [PATCH 6/8] locking/lockdep: Print right depth for chain key colission

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Message-Id: <20190226100327.19340-7-duyuyang@gmail.com>
Date:   Tue, 26 Feb 2019 18:03:25 +0800
From:   Yuyang Du <duyuyang@...il.com>
To:     peterz@...radead.org, mingo@...nel.org
Cc:     linux-kernel@...r.kernel.org, Yuyang Du <duyuyang@...il.com>
Subject: [PATCH 6/8] locking/lockdep: Print right depth for chain key colission

Since chains are separated by irq context, so when printing a chain the
depth should be consistent with it.

Signed-off-by: Yuyang Du <duyuyang@...il.com>
---
 kernel/locking/lockdep.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 55270938..ec4f0c6 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -2061,10 +2061,11 @@ static u64 print_chain_key_iteration(int class_idx, u64 chain_key)
 	struct held_lock *hlock;
 	u64 chain_key = 0;
 	int depth = curr->lockdep_depth;
-	int i;
+	int i = get_first_held_lock(curr, hlock_next);
 
-	printk("depth: %u\n", depth + 1);
-	for (i = get_first_held_lock(curr, hlock_next); i < depth; i++) {
+	printk("depth: %u (irq_context %u)\n", depth - i + 1,
+		hlock_next->irq_context);
+	for (i; i < depth; i++) {
 		hlock = curr->held_locks + i;
 		chain_key = print_chain_key_iteration(hlock->class_idx, chain_key);
 
-- 
1.8.3.1