proc: introduce proc_create_single{,_data}

Variants of proc_create{,_data} that directly take a seq_file show
callback and drastically reduces the boilerplate code in the callers.

All trivial callers converted over.

Signed-off-by: Christoph Hellwig <hch@lst.de>

3 files changed, 9 insertions, 71 deletions

diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index f781eff..6918c3d 100644
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -6451,19 +6451,6 @@ static int dac960_proc_show(struct seq_file *m, void *v)
   return 0;
 }
 
-static int dac960_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, dac960_proc_show, NULL);
-}
-
-static const struct file_operations dac960_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= dac960_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
 static int dac960_initial_status_proc_show(struct seq_file *m, void *v)
 {
 	DAC960_Controller_T *Controller = (DAC960_Controller_T *)m->private;
@@ -6471,19 +6458,6 @@ static int dac960_initial_status_proc_show(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int dac960_initial_status_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, dac960_initial_status_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations dac960_initial_status_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= dac960_initial_status_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
 static int dac960_current_status_proc_show(struct seq_file *m, void *v)
 {
   DAC960_Controller_T *Controller = (DAC960_Controller_T *) m->private;
@@ -6517,19 +6491,6 @@ static int dac960_current_status_proc_show(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int dac960_current_status_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, dac960_current_status_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations dac960_current_status_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= dac960_current_status_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
 static int dac960_user_command_proc_show(struct seq_file *m, void *v)
 {
 	DAC960_Controller_T *Controller = (DAC960_Controller_T *)m->private;
@@ -6584,16 +6545,18 @@ static void DAC960_CreateProcEntries(DAC960_Controller_T *Controller)
 
 	if (DAC960_ProcDirectoryEntry == NULL) {
 		DAC960_ProcDirectoryEntry = proc_mkdir("rd", NULL);
-		proc_create("status", 0, DAC960_ProcDirectoryEntry,
-			    &dac960_proc_fops);
+		proc_create_single("status", 0, DAC960_ProcDirectoryEntry,
+				dac960_proc_show);
 	}
 
 	snprintf(Controller->ControllerName, sizeof(Controller->ControllerName),
 		 "c%d", Controller->ControllerNumber);
 	ControllerProcEntry = proc_mkdir(Controller->ControllerName,
 					 DAC960_ProcDirectoryEntry);
-	proc_create_data("initial_status", 0, ControllerProcEntry, &dac960_initial_status_proc_fops, Controller);
-	proc_create_data("current_status", 0, ControllerProcEntry, &dac960_current_status_proc_fops, Controller);
+	proc_create_single_data("initial_status", 0, ControllerProcEntry,
+			dac960_initial_status_proc_show, Controller);
+	proc_create_single_data("current_status", 0, ControllerProcEntry,
+			dac960_current_status_proc_show, Controller);
 	proc_create_data("user_command", S_IWUSR | S_IRUSR, ControllerProcEntry, &dac960_user_command_proc_fops, Controller);
 	Controller->ControllerProcEntry = ControllerProcEntry;
 }
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index c61d20c..8dce5c0 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2538,18 +2538,6 @@ static int pkt_seq_show(struct seq_file *m, void *p)
 	return 0;
 }
 
-static int pkt_seq_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, pkt_seq_show, PDE_DATA(inode));
-}
-
-static const struct file_operations pkt_proc_fops = {
-	.open	= pkt_seq_open,
-	.read	= seq_read,
-	.llseek	= seq_lseek,
-	.release = single_release
-};
-
 static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 {
 	int i;
@@ -2604,7 +2592,7 @@ static int pkt_new_dev(struct pktcdvd_device *pd, dev_t dev)
 		goto out_mem;
 	}
 
-	proc_create_data(pd->name, 0, pkt_proc, &pkt_proc_fops, pd);
+	proc_create_single_data(pd->name, 0, pkt_proc, pkt_seq_show, pd);
 	pkt_dbg(1, pd, "writer mapped to %s\n", bdevname(bdev, b));
 	return 0;
 
diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c
index 6a55959..8fa4533 100644
--- a/drivers/block/ps3vram.c
+++ b/drivers/block/ps3vram.c
@@ -521,26 +521,13 @@ static int ps3vram_proc_show(struct seq_file *m, void *v)
 	return 0;
 }
 
-static int ps3vram_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ps3vram_proc_show, PDE_DATA(inode));
-}
-
-static const struct file_operations ps3vram_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= ps3vram_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-
 static void ps3vram_proc_init(struct ps3_system_bus_device *dev)
 {
 	struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
 	struct proc_dir_entry *pde;
 
-	pde = proc_create_data(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops,
-			       priv);
+	pde = proc_create_single_data(DEVICE_NAME, 0444, NULL,
+			ps3vram_proc_show, priv);
 	if (!pde)
 		dev_warn(&dev->core, "failed to create /proc entry\n");
 }