[PATCH] debugfs: use DEFINE_SHOW_ATTRIBUTE to define debugfs_regset32_fops

From: ChenXiaoSong
Date: Fri Sep 23 2022 - 05:25:24 EST


Use DEFINE_SHOW_ATTRIBUTE helper macro to simplify the code.

Signed-off-by: ChenXiaoSong <chenxiaosong2@xxxxxxxxxx>
---
fs/debugfs/file.c | 16 +++-------------
1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 950c63fa4d0b..ddb3fc258df9 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -1121,7 +1121,7 @@ void debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
}
EXPORT_SYMBOL_GPL(debugfs_print_regs32);

-static int debugfs_show_regset32(struct seq_file *s, void *data)
+static int debugfs_regset32_show(struct seq_file *s, void *data)
{
struct debugfs_regset32 *regset = s->private;

@@ -1136,17 +1136,7 @@ static int debugfs_show_regset32(struct seq_file *s, void *data)
return 0;
}

-static int debugfs_open_regset32(struct inode *inode, struct file *file)
-{
- return single_open(file, debugfs_show_regset32, inode->i_private);
-}
-
-static const struct file_operations fops_regset32 = {
- .open = debugfs_open_regset32,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(debugfs_regset32);

/**
* debugfs_create_regset32 - create a debugfs file that returns register values
@@ -1167,7 +1157,7 @@ void debugfs_create_regset32(const char *name, umode_t mode,
struct dentry *parent,
struct debugfs_regset32 *regset)
{
- debugfs_create_file(name, mode, parent, regset, &fops_regset32);
+ debugfs_create_file(name, mode, parent, regset, &debugfs_regset32_fops);
}
EXPORT_SYMBOL_GPL(debugfs_create_regset32);

--
2.31.1