linux-kernel - [PATCH 05/12] ocfs2: properly initial file

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Date:   Mon, 05 Nov 2018 12:30:47 +1100
From:   NeilBrown <neilb@...e.com>
To:     Jeff Layton <jlayton@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>
Cc:     "J. Bruce Fields" <bfields@...ldses.org>,
        Martin Wilck <mwilck@...e.de>, linux-fsdevel@...r.kernel.org,
        Frank Filz <ffilzlnx@...dspring.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 05/12] ocfs2: properly initial file_lock used for unlock.

Rather than assuming all-zeros is sufficient, use the available API to
initialize the file_lock structure use for unlock.
VFS-level changes will soon make it important that the
list_heads in file_lock are always properly initialized.

Signed-off-by: NeilBrown <neilb@...e.com>
---
 fs/ocfs2/locks.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/ocfs2/locks.c b/fs/ocfs2/locks.c
index d56f0079b858..9bb978d57c7d 100644
--- a/fs/ocfs2/locks.c
+++ b/fs/ocfs2/locks.c
@@ -52,6 +52,7 @@ static int ocfs2_do_flock(struct file *file, struct inode *inode,
 	if (lockres->l_flags & OCFS2_LOCK_ATTACHED &&
 	    lockres->l_level > LKM_NLMODE) {
 		int old_level = 0;
+		struct file_lock request;
 
 		if (lockres->l_level == LKM_EXMODE)
 			old_level = 1;
@@ -66,11 +67,10 @@ static int ocfs2_do_flock(struct file *file, struct inode *inode,
 		 * level.
 		 */
 
-		locks_lock_file_wait(file,
-				&(struct file_lock) {
-					.fl_type = F_UNLCK,
-					.fl_flags = FL_FLOCK
-				});
+		locks_init_lock(&request);
+		request.fl_type = F_UNLOCK;
+		request.fl_flags = FL_FLOCK;
+		locks_lock_file_wait(file, &request);
 
 		ocfs2_file_unlock(file);
 	}