linux-kernel - [PATCH] RAS/CEC: convert to DEFINE_SHOW

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Message-Id: <20181201135404.7470-1-tiny.windzz@gmail.com>
Date:   Sat,  1 Dec 2018 08:54:04 -0500
From:   Yangtao Li <tiny.windzz@...il.com>
To:     ebiederm@...ssion.com
Cc:     linux-kernel@...r.kernel.org, Yangtao Li <tiny.windzz@...il.com>
Subject: [PATCH] RAS/CEC: convert to DEFINE_SHOW_ATTRIBUTE

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
---
 drivers/ras/cec.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/drivers/ras/cec.c b/drivers/ras/cec.c
index 2d9ec378a8bc..05301ef4820e 100644
--- a/drivers/ras/cec.c
+++ b/drivers/ras/cec.c
@@ -400,7 +400,7 @@ static int count_threshold_set(void *data, u64 val)
 }
 DEFINE_DEBUGFS_ATTRIBUTE(count_threshold_ops, u64_get, count_threshold_set, "%lld\n");
 
-static int array_dump(struct seq_file *m, void *v)
+static int array_show(struct seq_file *m, void *v)
 {
 	struct ce_array *ca = &ce_arr;
 	u64 prev = 0;
@@ -436,18 +436,7 @@ static int array_dump(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int array_open(struct inode *inode, struct file *filp)
-{
-	return single_open(filp, array_dump, NULL);
-}
-
-static const struct file_operations array_ops = {
-	.owner	 = THIS_MODULE,
-	.open	 = array_open,
-	.read	 = seq_read,
-	.llseek	 = seq_lseek,
-	.release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(array);
 
 static int __init create_debugfs_nodes(void)
 {
@@ -459,13 +448,15 @@ static int __init create_debugfs_nodes(void)
 		return -1;
 	}
 
-	pfn = debugfs_create_file("pfn", S_IRUSR | S_IWUSR, d, &dfs_pfn, &pfn_ops);
+	pfn = debugfs_create_file("pfn", S_IRUSR | S_IWUSR, d,
+				    &dfs_pfn, &pfn_ops);
 	if (!pfn) {
 		pr_warn("Error creating pfn debugfs node!\n");
 		goto err;
 	}
 
-	array = debugfs_create_file("array", S_IRUSR, d, NULL, &array_ops);
+	array = debugfs_create_file("array", S_IRUSR, d, NULL,
+				    &array_fops);
 	if (!array) {
 		pr_warn("Error creating array debugfs node!\n");
 		goto err;
-- 
2.17.0