linux-kernel - [PATCH 1/5] locks: don't call locks_release_private from locks_copy

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Date:	Tue, 12 Aug 2014 10:48:09 -0400
From:	Jeff Layton <jlayton@...marydata.com>
To:	linux-fsdevel@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org
Subject: [PATCH 1/5] locks: don't call locks_release_private from locks_copy_lock

All callers of locks_copy_lock pass in a brand new file_lock struct, so
there's no need to calls locks_release_private on it. Replace that with
a warning that fires in the event that we receive a target lock that
doesn't look like it's properly initialized.

Signed-off-by: Jeff Layton <jlayton@...marydata.com>
---
 fs/locks.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/locks.c b/fs/locks.c
index 356667a434c1..2c2d4f5022a7 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -285,7 +285,8 @@ EXPORT_SYMBOL(__locks_copy_lock);
 
 void locks_copy_lock(struct file_lock *new, struct file_lock *fl)
 {
-	locks_release_private(new);
+	/* "new" must be a freshly-initialized lock */
+	WARN_ON_ONCE(new->fl_ops);
 
 	__locks_copy_lock(new, fl);
 	new->fl_file = fl->fl_file;
-- 
1.9.3

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