[PATCH -next v2] mips: Convert to DEFINE_SHOW_ATTRIBUTE

[Qinglang Miao <miaoqinglang@xxxxxxxxxx>]

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Qinglang Miao <miaoqinglang@xxxxxxxxxx>
---
v2: based on linux-next(20200917), and can be applied to
    mainline cleanly now.

 arch/mips/cavium-octeon/oct_ilm.c | 16 +++-------------
 arch/mips/kernel/segment.c        | 14 ++------------
 arch/mips/ralink/bootrom.c        | 14 ++------------
 3 files changed, 7 insertions(+), 37 deletions(-)

diff --git a/arch/mips/cavium-octeon/oct_ilm.c b/arch/mips/cavium-octeon/oct_ilm.c
index 99e27155b..10ed6ebdb 100644
--- a/arch/mips/cavium-octeon/oct_ilm.c
+++ b/arch/mips/cavium-octeon/oct_ilm.c
@@ -28,7 +28,7 @@ struct latency_info {
 static struct latency_info li;
 static struct dentry *dir;
 
-static int show_latency(struct seq_file *m, void *v)
+static int oct_ilm_show(struct seq_file *m, void *v)
 {
 	u64 cpuclk, avg, max, min;
 	struct latency_info curr_li = li;
@@ -44,17 +44,7 @@ static int show_latency(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int oct_ilm_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, show_latency, NULL);
-}
-
-static const struct file_operations oct_ilm_ops = {
-	.open = oct_ilm_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(oct_ilm);
 
 static int reset_statistics(void *data, u64 value)
 {
@@ -67,7 +57,7 @@ DEFINE_SIMPLE_ATTRIBUTE(reset_statistics_ops, NULL, reset_statistics, "%llu\n");
 static void init_debugfs(void)
 {
 	dir = debugfs_create_dir("oct_ilm", 0);
-	debugfs_create_file("statistics", 0222, dir, NULL, &oct_ilm_ops);
+	debugfs_create_file("statistics", 0222, dir, NULL, &oct_ilm_fops);
 	debugfs_create_file("reset", 0222, dir, NULL, &reset_statistics_ops);
 }
 
diff --git a/arch/mips/kernel/segment.c b/arch/mips/kernel/segment.c
index 0a9bd7b09..778487bf3 100644
--- a/arch/mips/kernel/segment.c
+++ b/arch/mips/kernel/segment.c
@@ -46,7 +46,7 @@ static void build_segment_config(char *str, unsigned int cfg)
 		((cfg & MIPS_SEGCFG_EU) >> MIPS_SEGCFG_EU_SHIFT));
 }
 
-static int show_segments(struct seq_file *m, void *v)
+static int segments_show(struct seq_file *m, void *v)
 {
 	unsigned int segcfg;
 	char str[42];
@@ -81,17 +81,7 @@ static int show_segments(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int segments_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, show_segments, NULL);
-}
-
-static const struct file_operations segments_fops = {
-	.open		= segments_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(segments);
 
 static int __init segments_info(void)
 {
diff --git a/arch/mips/ralink/bootrom.c b/arch/mips/ralink/bootrom.c
index 94ca8379b..c57fd38fd 100644
--- a/arch/mips/ralink/bootrom.c
+++ b/arch/mips/ralink/bootrom.c
@@ -19,21 +19,11 @@ static int bootrom_show(struct seq_file *s, void *unused)
 	return 0;
 }
 
-static int bootrom_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, bootrom_show, NULL);
-}
-
-static const struct file_operations bootrom_file_ops = {
-	.open		= bootrom_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(bootrom);
 
 static int __init bootrom_setup(void)
 {
-	debugfs_create_file("bootrom", 0444, NULL, NULL, &bootrom_file_ops);
+	debugfs_create_file("bootrom", 0444, NULL, NULL, &bootrom_fops);
 	return 0;
 }
 
-- 
2.23.0