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net: xenbus: convert to DEFINE_SHOW_ATTRIBUTE 

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yangtao Li 2018-12-10 10:53:29 -05:00 committed by David S. Miller
parent f578e67649
commit 5061e3f43b
1 changed files with 3 additions and 15 deletions
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18
drivers/net/xen-netback/xenbus.c
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@ -186,7 +186,7 @@ static const struct file_operations xenvif_dbg_io_ring_ops_fops = {
.write = xenvif_write_io_ring, .write = xenvif_write_io_ring,
}; };
static int xenvif_read_ctrl(struct seq_file *m, void *v) static int xenvif_ctrl_show(struct seq_file *m, void *v)
{ {
struct xenvif *vif = m->private; struct xenvif *vif = m->private;
@ -194,19 +194,7 @@ static int xenvif_read_ctrl(struct seq_file *m, void *v)
return 0; return 0;
} }
DEFINE_SHOW_ATTRIBUTE(xenvif_ctrl);
static int xenvif_ctrl_open(struct inode *inode, struct file *filp)
{
return single_open(filp, xenvif_read_ctrl, inode->i_private);
}
static const struct file_operations xenvif_dbg_ctrl_ops_fops = {
.owner = THIS_MODULE,
.open = xenvif_ctrl_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static void xenvif_debugfs_addif(struct xenvif *vif) static void xenvif_debugfs_addif(struct xenvif *vif)
{ {
@ -238,7 +226,7 @@ static void xenvif_debugfs_addif(struct xenvif *vif)
0400, 0400,
vif->xenvif_dbg_root, vif->xenvif_dbg_root,
vif, vif,
&xenvif_dbg_ctrl_ops_fops); &xenvif_ctrl_fops);
if (IS_ERR_OR_NULL(pfile)) if (IS_ERR_OR_NULL(pfile))
pr_warn("Creation of ctrl file returned %ld!\n", pr_warn("Creation of ctrl file returned %ld!\n",
PTR_ERR(pfile)); PTR_ERR(pfile));