linux-kernel - [PATCH] lib/error-inject: Convert to DEFINE_SEQ

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Date:   Sun, 12 Jun 2022 13:20:15 +0800
From:   wuchi <wuchi.zero@...il.com>
To:     mhiramat@...nel.org, kafai@...com, songliubraving@...com,
        yhs@...com, john.fastabend@...il.com, kpsingh@...nel.org
Cc:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: [PATCH] lib/error-inject: Convert to DEFINE_SEQ_ATTRIBUTE

Use DEFINE_SEQ_ATTRIBUTE helper macro to simplify the code.

Signed-off-by: wuchi <wuchi.zero@...il.com>
---
 lib/error-inject.c | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/lib/error-inject.c b/lib/error-inject.c
index 2ff5ef689d72..4a4f1278c419 100644
--- a/lib/error-inject.c
+++ b/lib/error-inject.c
@@ -197,24 +197,14 @@ static int ei_seq_show(struct seq_file *m, void *v)
 	return 0;
 }
 
-static const struct seq_operations ei_seq_ops = {
+static const struct seq_operations ei_sops = {
 	.start = ei_seq_start,
 	.next  = ei_seq_next,
 	.stop  = ei_seq_stop,
 	.show  = ei_seq_show,
 };
 
-static int ei_open(struct inode *inode, struct file *filp)
-{
-	return seq_open(filp, &ei_seq_ops);
-}
-
-static const struct file_operations debugfs_ei_ops = {
-	.open           = ei_open,
-	.read           = seq_read,
-	.llseek         = seq_lseek,
-	.release        = seq_release,
-};
+DEFINE_SEQ_ATTRIBUTE(ei);
 
 static int __init ei_debugfs_init(void)
 {
@@ -224,7 +214,7 @@ static int __init ei_debugfs_init(void)
 	if (!dir)
 		return -ENOMEM;
 
-	file = debugfs_create_file("list", 0444, dir, NULL, &debugfs_ei_ops);
+	file = debugfs_create_file("list", 0444, dir, NULL, &ei_fops);
 	if (!file) {
 		debugfs_remove(dir);
 		return -ENOMEM;
-- 
2.20.1