linux-kernel - [PATCH v2 6/9] pktcdvd: Use DEFINE_SHOW

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Date:   Fri, 10 Mar 2023 18:45:46 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Jens Axboe <axboe@...nel.dk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 6/9] pktcdvd: Use DEFINE_SHOW_ATTRIBUTE() to simplify code

Use DEFINE_SHOW_ATTRIBUTE() helper macro to simplify the code.
No functional change.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/block/pktcdvd.c | 23 +++--------------------
 1 file changed, 3 insertions(+), 20 deletions(-)

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index a53d21dbf2ab..2c5441303e55 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -504,24 +504,7 @@ static int pkt_seq_show(struct seq_file *m, void *p)
 			pd->write_congestion_on);
 	return 0;
 }
-
-static int pkt_debugfs_seq_show(struct seq_file *m, void *p)
-{
-	return pkt_seq_show(m, p);
-}
-
-static int pkt_debugfs_fops_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, pkt_debugfs_seq_show, inode->i_private);
-}
-
-static const struct file_operations debug_fops = {
-	.open		= pkt_debugfs_fops_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-	.owner		= THIS_MODULE,
-};
+DEFINE_SHOW_ATTRIBUTE(pkt_seq);
 
 static void pkt_debugfs_dev_new(struct pktcdvd_device *pd)
 {
@@ -531,8 +514,8 @@ static void pkt_debugfs_dev_new(struct pktcdvd_device *pd)
 	if (!pd->dfs_d_root)
 		return;
 
-	pd->dfs_f_info = debugfs_create_file("info", 0444,
-					     pd->dfs_d_root, pd, &debug_fops);
+	pd->dfs_f_info = debugfs_create_file("info", 0444, pd->dfs_d_root,
+					     pd, &pkt_seq_fops);
 }
 
 static void pkt_debugfs_dev_remove(struct pktcdvd_device *pd)
-- 
2.39.1