diff mbox

[ISDN] proc_fops: convert drivers/isdn/ to seq_file

Message ID 201001140237.08389.keil@b1-systems.de
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

Karsten Keil Jan. 14, 2010, 1:37 a.m. UTC
From: Alexey Dobriyan <adobriyan@gmail.com>

Convert code away from ->read_proc/->write_proc interfaces.  Switch to
proc_create()/proc_create_data() which make addition of proc entries
reliable wrt NULL ->proc_fops, NULL ->data and so on.

Problem with ->read_proc et al is described here commit
786d7e1612f0b0adb6046f19b906609e4fe8b1ba "Fix rmmod/read/write races in
/proc entries" 
[akpm@linux-foundation.org: CONFIG_PROC_FS=n build fix]

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
---
 Documentation/isdn/INTERFACE.CAPI       |    9 +-
 drivers/isdn/capi/capi.c                |   99 ++++++----------
 drivers/isdn/capi/capidrv.c             |   55 +++------
 drivers/isdn/capi/kcapi.c               |    8 +-
 drivers/isdn/gigaset/capi.c             |   75 ++++++------
 drivers/isdn/hardware/avm/avmcard.h     |    6 +-
 drivers/isdn/hardware/avm/b1.c          |   54 +++++----
 drivers/isdn/hardware/avm/b1dma.c       |   71 ++++++------
 drivers/isdn/hardware/avm/b1isa.c       |    2 +-
 drivers/isdn/hardware/avm/b1pci.c       |    4 +-
 drivers/isdn/hardware/avm/b1pcmcia.c    |    2 +-
 drivers/isdn/hardware/avm/c4.c          |   53 +++++----
 drivers/isdn/hardware/avm/t1isa.c       |    2 +-
 drivers/isdn/hardware/avm/t1pci.c       |    2 +-
 drivers/isdn/hardware/eicon/capimain.c  |   40 ++++---
 drivers/isdn/hardware/eicon/diva_didd.c |   45 ++++----
 drivers/isdn/hardware/eicon/divasi.c    |   48 ++++----
 drivers/isdn/hardware/eicon/divasproc.c |  198 
++++++++++++++-----------------
 drivers/isdn/hysdn/hycapi.c             |   56 +++++-----
 include/linux/isdn/capilli.h            |    3 +-
 net/bluetooth/cmtp/capi.c               |   37 ++++---
 21 files changed, 411 insertions(+), 458 deletions(-)

 {
@@ -582,7 +587,7 @@ int cmtp_attach_device(struct cmtp_session *session)
 	session->ctrl.send_message  = cmtp_send_message;
 
 	session->ctrl.procinfo      = cmtp_procinfo;
-	session->ctrl.ctr_read_proc = cmtp_ctr_read_proc;
+	session->ctrl.proc_fops = &cmtp_proc_fops;
 
 	if (attach_capi_ctr(&session->ctrl) < 0) {
 		BT_ERR("Can't attach new controller");

Comments

David Miller Jan. 14, 2010, 4:29 a.m. UTC | #1
From: Karsten Keil <keil@b1-systems.de>
Date: Thu, 14 Jan 2010 02:37:07 +0100

>  drivers/isdn/hardware/eicon/divasproc.c |  198 
> ++++++++++++++-----------------

Long lines broken up, again...
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David Miller Jan. 14, 2010, 11:01 a.m. UTC | #2
From: David Miller <davem@davemloft.net>
Date: Wed, 13 Jan 2010 20:29:52 -0800 (PST)

> From: Karsten Keil <keil@b1-systems.de>
> Date: Thu, 14 Jan 2010 02:37:07 +0100
> 
>>  drivers/isdn/hardware/eicon/divasproc.c |  198 
>> ++++++++++++++-----------------
> 
> Long lines broken up, again...

And just in case there is any confusion.

Take a look at:

	http://patchwork.ozlabs.org/patch/42844/

That patch is mangled, and that's what Karsten sent to the list.

Diff hunk header lines that quote the function which is being modified
are chopped up into multiple lines:

--------------------
@@ -2229,59 +2230,37 @@ static void lower_callback(unsigned int cmd, u32 
contr, void *data)
--------------------

That is corrupted, and it won't apply.  And that's what landed in my
mailbox for Karsten's posting too, so it's not like patchwork put that
newline there.

The amount of time and effort being expended for this trivial patch
submission is staggering!

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diff mbox

Patch

diff --git a/Documentation/isdn/INTERFACE.CAPI 
b/Documentation/isdn/INTERFACE.CAPI
index 5fe8de5..f172091 100644
--- a/Documentation/isdn/INTERFACE.CAPI
+++ b/Documentation/isdn/INTERFACE.CAPI
@@ -149,10 +149,11 @@  char *(*procinfo)(struct capi_ctr *ctrlr)
 	pointer to a callback function returning the entry for the device in
 	the CAPI controller info table, /proc/capi/controller
 
-read_proc_t *ctr_read_proc
-	pointer to the read_proc callback function for the device's proc file
-	system entry, /proc/capi/controllers/<n>; will be called with a
-	pointer to the device's capi_ctr structure as the last (data) argument
+const struct file_operations *proc_fops
+	pointers to callback functions for the device's proc file
+	system entry, /proc/capi/controllers/<n>; pointer to the device's
+	capi_ctr structure is available from struct proc_dir_entry::data
+	which is available from struct inode.
 
 Note: Callback functions except send_message() are never called in interrupt
 context.
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index 65bf91e..79f9364 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -33,6 +33,7 @@ 
 #endif /* CONFIG_ISDN_CAPI_MIDDLEWARE */
 #include <linux/skbuff.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/poll.h>
 #include <linux/capi.h>
 #include <linux/kernelcapi.h>
@@ -1407,114 +1408,84 @@  static void capinc_tty_exit(void)
  * /proc/capi/capi20:
  *  minor applid nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
  */
-static int proc_capidev_read_proc(char *page, char **start, off_t off,
-                                       int count, int *eof, void *data)
+static int capi20_proc_show(struct seq_file *m, void *v)
 {
         struct capidev *cdev;
 	struct list_head *l;
-	int len = 0;
 
 	read_lock(&capidev_list_lock);
 	list_for_each(l, &capidev_list) {
 		cdev = list_entry(l, struct capidev, list);
-		len += sprintf(page+len, "0 %d %lu %lu %lu %lu\n",
+		seq_printf(m, "0 %d %lu %lu %lu %lu\n",
 			cdev->ap.applid,
 			cdev->ap.nrecvctlpkt,
 			cdev->ap.nrecvdatapkt,
 			cdev->ap.nsentctlpkt,
 			cdev->ap.nsentdatapkt);
-		if (len <= off) {
-			off -= len;
-			len = 0;
-		} else {
-			if (len-off > count)
-				goto endloop;
-		}
 	}
-
-endloop:
 	read_unlock(&capidev_list_lock);
-	if (len < count)
-		*eof = 1;
-	if (len > count) len = count;
-	if (len < 0) len = 0;
-	return len;
+	return 0;
 }
 
+static int capi20_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, capi20_proc_show, NULL);
+}
+
+static const struct file_operations capi20_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= capi20_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 /*
  * /proc/capi/capi20ncci:
  *  applid ncci
  */
-static int proc_capincci_read_proc(char *page, char **start, off_t off,
-                                       int count, int *eof, void *data)
+static int capi20ncci_proc_show(struct seq_file *m, void *v)
 {
         struct capidev *cdev;
         struct capincci *np;
 	struct list_head *l;
-	int len = 0;
 
 	read_lock(&capidev_list_lock);
 	list_for_each(l, &capidev_list) {
 		cdev = list_entry(l, struct capidev, list);
 		for (np=cdev->nccis; np; np = np->next) {
-			len += sprintf(page+len, "%d 0x%x\n",
+			seq_printf(m, "%d 0x%x\n",
 				       cdev->ap.applid,
 				       np->ncci);
-			if (len <= off) {
-				off -= len;
-				len = 0;
-			} else {
-				if (len-off > count)
-					goto endloop;
-			}
 		}
 	}
-endloop:
 	read_unlock(&capidev_list_lock);
-	*start = page+off;
-	if (len < count)
-		*eof = 1;
-	if (len>count) len = count;
-	if (len<0) len = 0;
-	return len;
+	return 0;
 }
 
-static struct procfsentries {
-  char *name;
-  mode_t mode;
-  int (*read_proc)(char *page, char **start, off_t off,
-                                       int count, int *eof, void *data);
-  struct proc_dir_entry *procent;
-} procfsentries[] = {
-   /* { "capi",		  S_IFDIR, 0 }, */
-   { "capi/capi20", 	  0	 , proc_capidev_read_proc },
-   { "capi/capi20ncci",   0	 , proc_capincci_read_proc },
+static int capi20ncci_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, capi20ncci_proc_show, NULL);
+}
+
+static const struct file_operations capi20ncci_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= capi20ncci_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
 };
 
 static void __init proc_init(void)
 {
-    int nelem = ARRAY_SIZE(procfsentries);
-    int i;
-
-    for (i=0; i < nelem; i++) {
-        struct procfsentries *p = procfsentries + i;
-	p->procent = create_proc_entry(p->name, p->mode, NULL);
-	if (p->procent) p->procent->read_proc = p->read_proc;
-    }
+	proc_create("capi/capi20", 0, NULL, &capi20_proc_fops);
+	proc_create("capi/capi20ncci", 0, NULL, &capi20ncci_proc_fops);
 }
 
 static void __exit proc_exit(void)
 {
-    int nelem = ARRAY_SIZE(procfsentries);
-    int i;
-
-    for (i=nelem-1; i >= 0; i--) {
-        struct procfsentries *p = procfsentries + i;
-	if (p->procent) {
-	   remove_proc_entry(p->name, NULL);
-	   p->procent = NULL;
-	}
-    }
+	remove_proc_entry("capi/capi20", NULL);
+	remove_proc_entry("capi/capi20ncci", NULL);
 }
 
 /* -------- init function and module interface ---------------------- */
diff --git a/drivers/isdn/capi/capidrv.c b/drivers/isdn/capi/capidrv.c
index 66b7d7a..bb45015 100644
--- a/drivers/isdn/capi/capidrv.c
+++ b/drivers/isdn/capi/capidrv.c
@@ -24,6 +24,7 @@ 
 #include <linux/isdn.h>
 #include <linux/isdnif.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/capi.h>
 #include <linux/kernelcapi.h>
 #include <linux/ctype.h>
@@ -2229,59 +2230,37 @@  static void lower_callback(unsigned int cmd, u32 
contr, void *data)
  * /proc/capi/capidrv:
  * nrecvctlpkt nrecvdatapkt nsendctlpkt nsenddatapkt
  */
-static int proc_capidrv_read_proc(char *page, char **start, off_t off,
-                                       int count, int *eof, void *data)
+static int capidrv_proc_show(struct seq_file *m, void *v)
 {
-	int len = 0;
-
-	len += sprintf(page+len, "%lu %lu %lu %lu\n",
+	seq_printf(m, "%lu %lu %lu %lu\n",
 			global.ap.nrecvctlpkt,
 			global.ap.nrecvdatapkt,
 			global.ap.nsentctlpkt,
 			global.ap.nsentdatapkt);
-	if (off+count >= len)
-	   *eof = 1;
-	if (len < off)
-           return 0;
-	*start = page + off;
-	return ((count < len-off) ? count : len-off);
+	return 0;
+}
+
+static int capidrv_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, capidrv_proc_show, NULL);
 }
 
-static struct procfsentries {
-  char *name;
-  mode_t mode;
-  int (*read_proc)(char *page, char **start, off_t off,
-                                       int count, int *eof, void *data);
-  struct proc_dir_entry *procent;
-} procfsentries[] = {
-   /* { "capi",		  S_IFDIR, 0 }, */
-   { "capi/capidrv", 	  0	 , proc_capidrv_read_proc },
+static const struct file_operations capidrv_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= capidrv_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
 };
 
 static void __init proc_init(void)
 {
-    int nelem = ARRAY_SIZE(procfsentries);
-    int i;
-
-    for (i=0; i < nelem; i++) {
-        struct procfsentries *p = procfsentries + i;
-	p->procent = create_proc_entry(p->name, p->mode, NULL);
-	if (p->procent) p->procent->read_proc = p->read_proc;
-    }
+	proc_create("capi/capidrv", 0, NULL, &capidrv_proc_fops);
 }
 
 static void __exit proc_exit(void)
 {
-    int nelem = ARRAY_SIZE(procfsentries);
-    int i;
-
-    for (i=nelem-1; i >= 0; i--) {
-        struct procfsentries *p = procfsentries + i;
-	if (p->procent) {
-	   remove_proc_entry(p->name, NULL);
-	   p->procent = NULL;
-	}
-    }
+	remove_proc_entry("capi/capidrv", NULL);
 }
 
 static int __init capidrv_init(void)
diff --git a/drivers/isdn/capi/kcapi.c b/drivers/isdn/capi/kcapi.c
index dc506ab..b0bacf3 100644
--- a/drivers/isdn/capi/kcapi.c
+++ b/drivers/isdn/capi/kcapi.c
@@ -490,13 +490,7 @@  attach_capi_ctr(struct capi_ctr *card)
 	card->traceflag = showcapimsgs;
 
 	sprintf(card->procfn, "capi/controllers/%d", card->cnr);
-	card->procent = create_proc_entry(card->procfn, 0, NULL);
-	if (card->procent) {
-	   card->procent->read_proc = 
-		(int (*)(char *,char **,off_t,int,int *,void *))
-			card->ctr_read_proc;
-	   card->procent->data = card;
-	}
+	card->procent = proc_create_data(card->procfn, 0, NULL, card->proc_fops, 
card);
 
 	ncards++;
 	printk(KERN_NOTICE "kcapi: Controller [%03d]: %s attached\n",
diff --git a/drivers/isdn/gigaset/capi.c b/drivers/isdn/gigaset/capi.c
index 3f5cd06..6f0ae32 100644
--- a/drivers/isdn/gigaset/capi.c
+++ b/drivers/isdn/gigaset/capi.c
@@ -13,6 +13,8 @@ 
 
 #include "gigaset.h"
 #include <linux/ctype.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/isdn/capilli.h>
 #include <linux/isdn/capicmd.h>
 #include <linux/isdn/capiutil.h>
@@ -2106,35 +2108,22 @@  static char *gigaset_procinfo(struct capi_ctr *ctr)
 	return ctr->name;	/* ToDo: more? */
 }
 
-/**
- * gigaset_ctr_read_proc() - build controller proc file entry
- * @page:	buffer of PAGE_SIZE bytes for receiving the entry.
- * @start:	unused.
- * @off:	unused.
- * @count:	unused.
- * @eof:	unused.
- * @ctr:	controller descriptor structure.
- *
- * Return value: length of generated entry
- */
-static int gigaset_ctr_read_proc(char *page, char **start, off_t off,
-			  int count, int *eof, struct capi_ctr *ctr)
+static int gigaset_proc_show(struct seq_file *m, void *v)
 {
+	struct capi_ctr *ctr = m->private;
 	struct cardstate *cs = ctr->driverdata;
 	char *s;
 	int i;
-	int len = 0;
-	len += sprintf(page+len, "%-16s %s\n", "name", ctr->name);
-	len += sprintf(page+len, "%-16s %s %s\n", "dev",
+
+	seq_printf(m, "%-16s %s\n", "name", ctr->name);
+	seq_printf(m, "%-16s %s %s\n", "dev",
 			dev_driver_string(cs->dev), dev_name(cs->dev));
-	len += sprintf(page+len, "%-16s %d\n", "id", cs->myid);
+	seq_printf(m, "%-16s %d\n", "id", cs->myid);
 	if (cs->gotfwver)
-		len += sprintf(page+len, "%-16s %d.%d.%d.%d\n", "firmware",
+		seq_printf(m, "%-16s %d.%d.%d.%d\n", "firmware",
 			cs->fwver[0], cs->fwver[1], cs->fwver[2], cs->fwver[3]);
-	len += sprintf(page+len, "%-16s %d\n", "channels",
-			cs->channels);
-	len += sprintf(page+len, "%-16s %s\n", "onechannel",
-			cs->onechannel ? "yes" : "no");
+	seq_printf(m, "%-16s %d\n", "channels", cs->channels);
+	seq_printf(m, "%-16s %s\n", "onechannel", cs->onechannel ? "yes" : "no");
 
 	switch (cs->mode) {
 	case M_UNKNOWN:
@@ -2152,7 +2141,7 @@  static int gigaset_ctr_read_proc(char *page, char 
**start, off_t off,
 	default:
 		s = "??";
 	}
-	len += sprintf(page+len, "%-16s %s\n", "mode", s);
+	seq_printf(m, "%-16s %s\n", "mode", s);
 
 	switch (cs->mstate) {
 	case MS_UNINITIALIZED:
@@ -2176,25 +2165,21 @@  static int gigaset_ctr_read_proc(char *page, char 
**start, off_t off,
 	default:
 		s = "??";
 	}
-	len += sprintf(page+len, "%-16s %s\n", "mstate", s);
+	seq_printf(m, "%-16s %s\n", "mstate", s);
 
-	len += sprintf(page+len, "%-16s %s\n", "running",
-			cs->running ? "yes" : "no");
-	len += sprintf(page+len, "%-16s %s\n", "connected",
-			cs->connected ? "yes" : "no");
-	len += sprintf(page+len, "%-16s %s\n", "isdn_up",
-			cs->isdn_up ? "yes" : "no");
-	len += sprintf(page+len, "%-16s %s\n", "cidmode",
-			cs->cidmode ? "yes" : "no");
+	seq_printf(m, "%-16s %s\n", "running", cs->running ? "yes" : "no");
+	seq_printf(m, "%-16s %s\n", "connected", cs->connected ? "yes" : "no");
+	seq_printf(m, "%-16s %s\n", "isdn_up", cs->isdn_up ? "yes" : "no");
+	seq_printf(m, "%-16s %s\n", "cidmode", cs->cidmode ? "yes" : "no");
 
 	for (i = 0; i < cs->channels; i++) {
-		len += sprintf(page+len, "[%d]%-13s %d\n", i, "corrupted",
+		seq_printf(m, "[%d]%-13s %d\n", i, "corrupted",
 				cs->bcs[i].corrupted);
-		len += sprintf(page+len, "[%d]%-13s %d\n", i, "trans_down",
+		seq_printf(m, "[%d]%-13s %d\n", i, "trans_down",
 				cs->bcs[i].trans_down);
-		len += sprintf(page+len, "[%d]%-13s %d\n", i, "trans_up",
+		seq_printf(m, "[%d]%-13s %d\n", i, "trans_up",
 				cs->bcs[i].trans_up);
-		len += sprintf(page+len, "[%d]%-13s %d\n", i, "chstate",
+		seq_printf(m, "[%d]%-13s %d\n", i, "chstate",
 				cs->bcs[i].chstate);
 		switch (cs->bcs[i].proto2) {
 		case L2_BITSYNC:
@@ -2209,11 +2194,23 @@  static int gigaset_ctr_read_proc(char *page, char 
**start, off_t off,
 		default:
 			s = "??";
 		}
-		len += sprintf(page+len, "[%d]%-13s %s\n", i, "proto2", s);
+		seq_printf(m, "[%d]%-13s %s\n", i, "proto2", s);
 	}
-	return len;
+	return 0;
 }
 
+static int gigaset_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, gigaset_proc_show, PDE(inode)->data);
+}
+
+static const struct file_operations gigaset_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= gigaset_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
 
 static struct capi_driver capi_driver_gigaset = {
 	.name		= "gigaset",
@@ -2256,7 +2253,7 @@  int gigaset_isdn_register(struct cardstate *cs, const 
char *isdnid)
 	iif->ctr.release_appl  = gigaset_release_appl;
 	iif->ctr.send_message  = gigaset_send_message;
 	iif->ctr.procinfo      = gigaset_procinfo;
-	iif->ctr.ctr_read_proc = gigaset_ctr_read_proc;
+	iif->ctr.proc_fops = &gigaset_proc_fops;
 	INIT_LIST_HEAD(&iif->appls);
 	skb_queue_head_init(&iif->sendqueue);
 	atomic_set(&iif->sendqlen, 0);
diff --git a/drivers/isdn/hardware/avm/avmcard.h 
b/drivers/isdn/hardware/avm/avmcard.h
index d964f07..a70e885 100644
--- a/drivers/isdn/hardware/avm/avmcard.h
+++ b/drivers/isdn/hardware/avm/avmcard.h
@@ -556,8 +556,7 @@  u16  b1_send_message(struct capi_ctr *ctrl, struct sk_buff 
*skb);
 void b1_parse_version(avmctrl_info *card);
 irqreturn_t b1_interrupt(int interrupt, void *devptr);
 
-int b1ctl_read_proc(char *page, char **start, off_t off,
-        		int count, int *eof, struct capi_ctr *ctrl);
+extern const struct file_operations b1ctl_proc_fops;
 
 avmcard_dmainfo *avmcard_dma_alloc(char *name, struct pci_dev *,
 				   long rsize, long ssize);
@@ -577,7 +576,6 @@  void b1dma_register_appl(struct capi_ctr *ctrl,
 				capi_register_params *rp);
 void b1dma_release_appl(struct capi_ctr *ctrl, u16 appl);
 u16  b1dma_send_message(struct capi_ctr *ctrl, struct sk_buff *skb);
-int b1dmactl_read_proc(char *page, char **start, off_t off,
-        		int count, int *eof, struct capi_ctr *ctrl);
+extern const struct file_operations b1dmactl_proc_fops;
 
 #endif /* _AVMCARD_H_ */
diff --git a/drivers/isdn/hardware/avm/b1.c b/drivers/isdn/hardware/avm/b1.c
index a7c0083..c38fa0f 100644
--- a/drivers/isdn/hardware/avm/b1.c
+++ b/drivers/isdn/hardware/avm/b1.c
@@ -12,6 +12,8 @@ 
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/skbuff.h>
 #include <linux/delay.h>
 #include <linux/mm.h>
@@ -634,18 +636,17 @@  irqreturn_t b1_interrupt(int interrupt, void *devptr)
 }
 
 /* ------------------------------------------------------------- */
-int b1ctl_read_proc(char *page, char **start, off_t off,
-        		int count, int *eof, struct capi_ctr *ctrl)
+static int b1ctl_proc_show(struct seq_file *m, void *v)
 {
+	struct capi_ctr *ctrl = m->private;
 	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
 	avmcard *card = cinfo->card;
 	u8 flag;
-	int len = 0;
 	char *s;
 
-	len += sprintf(page+len, "%-16s %s\n", "name", card->name);
-	len += sprintf(page+len, "%-16s 0x%x\n", "io", card->port);
-	len += sprintf(page+len, "%-16s %d\n", "irq", card->irq);
+	seq_printf(m, "%-16s %s\n", "name", card->name);
+	seq_printf(m, "%-16s 0x%x\n", "io", card->port);
+	seq_printf(m, "%-16s %d\n", "irq", card->irq);
 	switch (card->cardtype) {
 	case avm_b1isa: s = "B1 ISA"; break;
 	case avm_b1pci: s = "B1 PCI"; break;
@@ -658,20 +659,20 @@  int b1ctl_read_proc(char *page, char **start, off_t off,
 	case avm_c2: s = "C2"; break;
 	default: s = "???"; break;
 	}
-	len += sprintf(page+len, "%-16s %s\n", "type", s);
+	seq_printf(m, "%-16s %s\n", "type", s);
 	if (card->cardtype == avm_t1isa)
-	   len += sprintf(page+len, "%-16s %d\n", "cardnr", card->cardnr);
+		seq_printf(m, "%-16s %d\n", "cardnr", card->cardnr);
 	if ((s = cinfo->version[VER_DRIVER]) != NULL)
-	   len += sprintf(page+len, "%-16s %s\n", "ver_driver", s);
+		seq_printf(m, "%-16s %s\n", "ver_driver", s);
 	if ((s = cinfo->version[VER_CARDTYPE]) != NULL)
-	   len += sprintf(page+len, "%-16s %s\n", "ver_cardtype", s);
+		seq_printf(m, "%-16s %s\n", "ver_cardtype", s);
 	if ((s = cinfo->version[VER_SERIAL]) != NULL)
-	   len += sprintf(page+len, "%-16s %s\n", "ver_serial", s);
+		seq_printf(m, "%-16s %s\n", "ver_serial", s);
 
 	if (card->cardtype != avm_m1) {
         	flag = ((u8 *)(ctrl->profile.manu))[3];
         	if (flag)
-			len += sprintf(page+len, "%-16s%s%s%s%s%s%s%s\n",
+			seq_printf(m, "%-16s%s%s%s%s%s%s%s\n",
 			"protocol",
 			(flag & 0x01) ? " DSS1" : "",
 			(flag & 0x02) ? " CT1" : "",
@@ -685,7 +686,7 @@  int b1ctl_read_proc(char *page, char **start, off_t off,
 	if (card->cardtype != avm_m1) {
         	flag = ((u8 *)(ctrl->profile.manu))[5];
 		if (flag)
-			len += sprintf(page+len, "%-16s%s%s%s%s\n",
+			seq_printf(m, "%-16s%s%s%s%s\n",
 			"linetype",
 			(flag & 0x01) ? " point to point" : "",
 			(flag & 0x02) ? " point to multipoint" : "",
@@ -693,16 +694,25 @@  int b1ctl_read_proc(char *page, char **start, off_t off,
 			(flag & 0x04) ? " leased line with D-channel" : ""
 			);
 	}
-	len += sprintf(page+len, "%-16s %s\n", "cardname", cinfo->cardname);
-
-	if (off+count >= len)
-	   *eof = 1;
-	if (len < off)
-           return 0;
-	*start = page + off;
-	return ((count < len-off) ? count : len-off);
+	seq_printf(m, "%-16s %s\n", "cardname", cinfo->cardname);
+
+	return 0;
+}
+
+static int b1ctl_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, b1ctl_proc_show, PDE(inode)->data);
 }
 
+const struct file_operations b1ctl_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= b1ctl_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+EXPORT_SYMBOL(b1ctl_proc_fops);
+
 /* ------------------------------------------------------------- */
 
 #ifdef CONFIG_PCI
@@ -781,8 +791,6 @@  EXPORT_SYMBOL(b1_send_message);
 EXPORT_SYMBOL(b1_parse_version);
 EXPORT_SYMBOL(b1_interrupt);
 
-EXPORT_SYMBOL(b1ctl_read_proc);
-
 static int __init b1_init(void)
 {
 	char *p;
diff --git a/drivers/isdn/hardware/avm/b1dma.c 
b/drivers/isdn/hardware/avm/b1dma.c
index 0e84aaa..124550d 100644
--- a/drivers/isdn/hardware/avm/b1dma.c
+++ b/drivers/isdn/hardware/avm/b1dma.c
@@ -11,6 +11,8 @@ 
 
 #include <linux/module.h>
 #include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/skbuff.h>
 #include <linux/delay.h>
 #include <linux/mm.h>
@@ -855,21 +857,20 @@  u16 b1dma_send_message(struct capi_ctr *ctrl, struct 
sk_buff *skb)
 
 /* ------------------------------------------------------------- */
 
-int b1dmactl_read_proc(char *page, char **start, off_t off,
-        		int count, int *eof, struct capi_ctr *ctrl)
+static int b1dmactl_proc_show(struct seq_file *m, void *v)
 {
+	struct capi_ctr *ctrl = m->private;
 	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
 	avmcard *card = cinfo->card;
 	u8 flag;
-	int len = 0;
 	char *s;
 	u32 txoff, txlen, rxoff, rxlen, csr;
 	unsigned long flags;
 
-	len += sprintf(page+len, "%-16s %s\n", "name", card->name);
-	len += sprintf(page+len, "%-16s 0x%x\n", "io", card->port);
-	len += sprintf(page+len, "%-16s %d\n", "irq", card->irq);
-	len += sprintf(page+len, "%-16s 0x%lx\n", "membase", card->membase);
+	seq_printf(m, "%-16s %s\n", "name", card->name);
+	seq_printf(m, "%-16s 0x%x\n", "io", card->port);
+	seq_printf(m, "%-16s %d\n", "irq", card->irq);
+	seq_printf(m, "%-16s 0x%lx\n", "membase", card->membase);
 	switch (card->cardtype) {
 	case avm_b1isa: s = "B1 ISA"; break;
 	case avm_b1pci: s = "B1 PCI"; break;
@@ -882,18 +883,18 @@  int b1dmactl_read_proc(char *page, char **start, off_t 
off,
 	case avm_c2: s = "C2"; break;
 	default: s = "???"; break;
 	}
-	len += sprintf(page+len, "%-16s %s\n", "type", s);
+	seq_printf(m, "%-16s %s\n", "type", s);
 	if ((s = cinfo->version[VER_DRIVER]) != NULL)
-	   len += sprintf(page+len, "%-16s %s\n", "ver_driver", s);
+		seq_printf(m, "%-16s %s\n", "ver_driver", s);
 	if ((s = cinfo->version[VER_CARDTYPE]) != NULL)
-	   len += sprintf(page+len, "%-16s %s\n", "ver_cardtype", s);
+		seq_printf(m, "%-16s %s\n", "ver_cardtype", s);
 	if ((s = cinfo->version[VER_SERIAL]) != NULL)
-	   len += sprintf(page+len, "%-16s %s\n", "ver_serial", s);
+		seq_printf(m, "%-16s %s\n", "ver_serial", s);
 
 	if (card->cardtype != avm_m1) {
         	flag = ((u8 *)(ctrl->profile.manu))[3];
         	if (flag)
-			len += sprintf(page+len, "%-16s%s%s%s%s%s%s%s\n",
+			seq_printf(m, "%-16s%s%s%s%s%s%s%s\n",
 			"protocol",
 			(flag & 0x01) ? " DSS1" : "",
 			(flag & 0x02) ? " CT1" : "",
@@ -907,7 +908,7 @@  int b1dmactl_read_proc(char *page, char **start, off_t 
off,
 	if (card->cardtype != avm_m1) {
         	flag = ((u8 *)(ctrl->profile.manu))[5];
 		if (flag)
-			len += sprintf(page+len, "%-16s%s%s%s%s\n",
+			seq_printf(m, "%-16s%s%s%s%s\n",
 			"linetype",
 			(flag & 0x01) ? " point to point" : "",
 			(flag & 0x02) ? " point to multipoint" : "",
@@ -915,7 +916,7 @@  int b1dmactl_read_proc(char *page, char **start, off_t 
off,
 			(flag & 0x04) ? " leased line with D-channel" : ""
 			);
 	}
-	len += sprintf(page+len, "%-16s %s\n", "cardname", cinfo->cardname);
+	seq_printf(m, "%-16s %s\n", "cardname", cinfo->cardname);
 
 
 	spin_lock_irqsave(&card->lock, flags);
@@ -930,27 +931,30 @@  int b1dmactl_read_proc(char *page, char **start, off_t 
off,
 
 	spin_unlock_irqrestore(&card->lock, flags);
 
-        len += sprintf(page+len, "%-16s 0x%lx\n",
-				"csr (cached)", (unsigned long)card->csr);
-        len += sprintf(page+len, "%-16s 0x%lx\n",
-				"csr", (unsigned long)csr);
-        len += sprintf(page+len, "%-16s %lu\n",
-				"txoff", (unsigned long)txoff);
-        len += sprintf(page+len, "%-16s %lu\n",
-				"txlen", (unsigned long)txlen);
-        len += sprintf(page+len, "%-16s %lu\n",
-				"rxoff", (unsigned long)rxoff);
-        len += sprintf(page+len, "%-16s %lu\n",
-				"rxlen", (unsigned long)rxlen);
-
-	if (off+count >= len)
-	   *eof = 1;
-	if (len < off)
-           return 0;
-	*start = page + off;
-	return ((count < len-off) ? count : len-off);
+	seq_printf(m, "%-16s 0x%lx\n", "csr (cached)", (unsigned long)card->csr);
+	seq_printf(m, "%-16s 0x%lx\n", "csr", (unsigned long)csr);
+	seq_printf(m, "%-16s %lu\n", "txoff", (unsigned long)txoff);
+	seq_printf(m, "%-16s %lu\n", "txlen", (unsigned long)txlen);
+	seq_printf(m, "%-16s %lu\n", "rxoff", (unsigned long)rxoff);
+	seq_printf(m, "%-16s %lu\n", "rxlen", (unsigned long)rxlen);
+
+	return 0;
+}
+
+static int b1dmactl_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, b1dmactl_proc_show, PDE(inode)->data);
 }
 
+const struct file_operations b1dmactl_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= b1dmactl_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+EXPORT_SYMBOL(b1dmactl_proc_fops);
+
 /* ------------------------------------------------------------- */
 
 EXPORT_SYMBOL(b1dma_reset);
@@ -963,7 +967,6 @@  EXPORT_SYMBOL(b1dma_reset_ctr);
 EXPORT_SYMBOL(b1dma_register_appl);
 EXPORT_SYMBOL(b1dma_release_appl);
 EXPORT_SYMBOL(b1dma_send_message);
-EXPORT_SYMBOL(b1dmactl_read_proc);
 
 static int __init b1dma_init(void)
 {
diff --git a/drivers/isdn/hardware/avm/b1isa.c 
b/drivers/isdn/hardware/avm/b1isa.c
index 6461a32..ff53905 100644
--- a/drivers/isdn/hardware/avm/b1isa.c
+++ b/drivers/isdn/hardware/avm/b1isa.c
@@ -121,7 +121,7 @@  static int b1isa_probe(struct pci_dev *pdev)
 	cinfo->capi_ctrl.load_firmware = b1_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = b1_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = b1isa_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1ctl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 
 	retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/avm/b1pci.c 
b/drivers/isdn/hardware/avm/b1pci.c
index 5b314a2..c97e431 100644
--- a/drivers/isdn/hardware/avm/b1pci.c
+++ b/drivers/isdn/hardware/avm/b1pci.c
@@ -112,7 +112,7 @@  static int b1pci_probe(struct capicardparams *p, struct 
pci_dev *pdev)
 	cinfo->capi_ctrl.load_firmware = b1_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = b1_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = b1pci_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1ctl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 	cinfo->capi_ctrl.owner         = THIS_MODULE;
 
@@ -251,7 +251,7 @@  static int b1pciv4_probe(struct capicardparams *p, struct 
pci_dev *pdev)
 	cinfo->capi_ctrl.load_firmware = b1dma_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = b1dma_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = b1pciv4_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1dmactl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1dmactl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 
 	retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/avm/b1pcmcia.c 
b/drivers/isdn/hardware/avm/b1pcmcia.c
index 7740403..d6391e0 100644
--- a/drivers/isdn/hardware/avm/b1pcmcia.c
+++ b/drivers/isdn/hardware/avm/b1pcmcia.c
@@ -108,7 +108,7 @@  static int b1pcmcia_add_card(unsigned int port, unsigned 
irq,
 	cinfo->capi_ctrl.load_firmware = b1_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = b1_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = b1pcmcia_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1ctl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 
 	retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/avm/c4.c b/drivers/isdn/hardware/avm/c4.c
index 6833301..de6e6b3 100644
--- a/drivers/isdn/hardware/avm/c4.c
+++ b/drivers/isdn/hardware/avm/c4.c
@@ -11,6 +11,8 @@ 
 
 #include <linux/module.h>
 #include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/skbuff.h>
 #include <linux/delay.h>
 #include <linux/mm.h>
@@ -1062,19 +1064,18 @@  static char *c4_procinfo(struct capi_ctr *ctrl)
 	return cinfo->infobuf;
 }
 
-static int c4_read_proc(char *page, char **start, off_t off,
-        		int count, int *eof, struct capi_ctr *ctrl)
+static int c4_proc_show(struct seq_file *m, void *v)
 {
+	struct capi_ctr *ctrl = m->private;
 	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
 	avmcard *card = cinfo->card;
 	u8 flag;
-	int len = 0;
 	char *s;
 
-	len += sprintf(page+len, "%-16s %s\n", "name", card->name);
-	len += sprintf(page+len, "%-16s 0x%x\n", "io", card->port);
-	len += sprintf(page+len, "%-16s %d\n", "irq", card->irq);
-	len += sprintf(page+len, "%-16s 0x%lx\n", "membase", card->membase);
+	seq_printf(m, "%-16s %s\n", "name", card->name);
+	seq_printf(m, "%-16s 0x%x\n", "io", card->port);
+	seq_printf(m, "%-16s %d\n", "irq", card->irq);
+	seq_printf(m, "%-16s 0x%lx\n", "membase", card->membase);
 	switch (card->cardtype) {
 	case avm_b1isa: s = "B1 ISA"; break;
 	case avm_b1pci: s = "B1 PCI"; break;
@@ -1087,18 +1088,18 @@  static int c4_read_proc(char *page, char **start, 
off_t off,
 	case avm_c2: s = "C2"; break;
 	default: s = "???"; break;
 	}
-	len += sprintf(page+len, "%-16s %s\n", "type", s);
+	seq_printf(m, "%-16s %s\n", "type", s);
 	if ((s = cinfo->version[VER_DRIVER]) != NULL)
-	   len += sprintf(page+len, "%-16s %s\n", "ver_driver", s);
+		seq_printf(m, "%-16s %s\n", "ver_driver", s);
 	if ((s = cinfo->version[VER_CARDTYPE]) != NULL)
-	   len += sprintf(page+len, "%-16s %s\n", "ver_cardtype", s);
+		seq_printf(m, "%-16s %s\n", "ver_cardtype", s);
 	if ((s = cinfo->version[VER_SERIAL]) != NULL)
-	   len += sprintf(page+len, "%-16s %s\n", "ver_serial", s);
+		seq_printf(m, "%-16s %s\n", "ver_serial", s);
 
 	if (card->cardtype != avm_m1) {
         	flag = ((u8 *)(ctrl->profile.manu))[3];
         	if (flag)
-			len += sprintf(page+len, "%-16s%s%s%s%s%s%s%s\n",
+			seq_printf(m, "%-16s%s%s%s%s%s%s%s\n",
 			"protocol",
 			(flag & 0x01) ? " DSS1" : "",
 			(flag & 0x02) ? " CT1" : "",
@@ -1112,7 +1113,7 @@  static int c4_read_proc(char *page, char **start, off_t 
off,
 	if (card->cardtype != avm_m1) {
         	flag = ((u8 *)(ctrl->profile.manu))[5];
 		if (flag)
-			len += sprintf(page+len, "%-16s%s%s%s%s\n",
+			seq_printf(m, "%-16s%s%s%s%s\n",
 			"linetype",
 			(flag & 0x01) ? " point to point" : "",
 			(flag & 0x02) ? " point to multipoint" : "",
@@ -1120,16 +1121,24 @@  static int c4_read_proc(char *page, char **start, 
off_t off,
 			(flag & 0x04) ? " leased line with D-channel" : ""
 			);
 	}
-	len += sprintf(page+len, "%-16s %s\n", "cardname", cinfo->cardname);
-
-	if (off+count >= len)
-	   *eof = 1;
-	if (len < off)
-           return 0;
-	*start = page + off;
-	return ((count < len-off) ? count : len-off);
+	seq_printf(m, "%-16s %s\n", "cardname", cinfo->cardname);
+
+	return 0;
 }
 
+static int c4_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, c4_proc_show, PDE(inode)->data);
+}
+
+static const struct file_operations c4_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= c4_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 /* ------------------------------------------------------------- */
 
 static int c4_add_card(struct capicardparams *p, struct pci_dev *dev,
@@ -1201,7 +1210,7 @@  static int c4_add_card(struct capicardparams *p, struct 
pci_dev *dev,
 		cinfo->capi_ctrl.load_firmware = c4_load_firmware;
 		cinfo->capi_ctrl.reset_ctr     = c4_reset_ctr;
 		cinfo->capi_ctrl.procinfo      = c4_procinfo;
-		cinfo->capi_ctrl.ctr_read_proc = c4_read_proc;
+		cinfo->capi_ctrl.proc_fops = &c4_proc_fops;
 		strcpy(cinfo->capi_ctrl.name, card->name);
 
 		retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/avm/t1isa.c 
b/drivers/isdn/hardware/avm/t1isa.c
index 1c53fd4..baeeb3c 100644
--- a/drivers/isdn/hardware/avm/t1isa.c
+++ b/drivers/isdn/hardware/avm/t1isa.c
@@ -429,7 +429,7 @@  static int t1isa_probe(struct pci_dev *pdev, int cardnr)
 	cinfo->capi_ctrl.load_firmware = t1isa_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = t1isa_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = t1isa_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1ctl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 
 	retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/avm/t1pci.c 
b/drivers/isdn/hardware/avm/t1pci.c
index e6d298d..5a3f830 100644
--- a/drivers/isdn/hardware/avm/t1pci.c
+++ b/drivers/isdn/hardware/avm/t1pci.c
@@ -119,7 +119,7 @@  static int t1pci_add_card(struct capicardparams *p, struct 
pci_dev *pdev)
 	cinfo->capi_ctrl.load_firmware = b1dma_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = b1dma_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = t1pci_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1dmactl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1dmactl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 
 	retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/eicon/capimain.c 
b/drivers/isdn/hardware/eicon/capimain.c
index 98fcdfc..0f073cd 100644
--- a/drivers/isdn/hardware/eicon/capimain.c
+++ b/drivers/isdn/hardware/eicon/capimain.c
@@ -13,6 +13,7 @@ 
 #include <linux/module.h>
 #include <linux/init.h>
 #include <asm/uaccess.h>
+#include <linux/seq_file.h>
 #include <linux/skbuff.h>
 
 #include "os_capi.h"
@@ -75,25 +76,32 @@  void diva_os_free_message_buffer(diva_os_message_buffer_s 
* dmb)
 /*
  * proc function for controller info
  */
-static int diva_ctl_read_proc(char *page, char **start, off_t off,
-			      int count, int *eof, struct capi_ctr *ctrl)
+static int diva_ctl_proc_show(struct seq_file *m, void *v)
 {
+	struct capi_ctr *ctrl = m->private;
 	diva_card *card = (diva_card *) ctrl->driverdata;
-	int len = 0;
-
-	len += sprintf(page + len, "%s\n", ctrl->name);
-	len += sprintf(page + len, "Serial No. : %s\n", ctrl->serial);
-	len += sprintf(page + len, "Id         : %d\n", card->Id);
-	len += sprintf(page + len, "Channels   : %d\n", card->d.channels);
-
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+
+	seq_printf(m, "%s\n", ctrl->name);
+	seq_printf(m, "Serial No. : %s\n", ctrl->serial);
+	seq_printf(m, "Id         : %d\n", card->Id);
+	seq_printf(m, "Channels   : %d\n", card->d.channels);
+
+	return 0;
+}
+
+static int diva_ctl_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, diva_ctl_proc_show, NULL);
 }
 
+static const struct file_operations diva_ctl_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= diva_ctl_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 /*
  * set additional os settings in capi_ctr struct
  */
@@ -102,7 +110,7 @@  void diva_os_set_controller_struct(struct capi_ctr *ctrl)
 	ctrl->driver_name = DRIVERLNAME;
 	ctrl->load_firmware = NULL;
 	ctrl->reset_ctr = NULL;
-	ctrl->ctr_read_proc = diva_ctl_read_proc;
+	ctrl->proc_fops = &diva_ctl_proc_fops;
 	ctrl->owner = THIS_MODULE;
 }
 
diff --git a/drivers/isdn/hardware/eicon/diva_didd.c 
b/drivers/isdn/hardware/eicon/diva_didd.c
index 993b14c..5d06a74 100644
--- a/drivers/isdn/hardware/eicon/diva_didd.c
+++ b/drivers/isdn/hardware/eicon/diva_didd.c
@@ -15,6 +15,7 @@ 
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <net/net_namespace.h>
 
 #include "platform.h"
@@ -62,39 +63,41 @@  static char *getrev(const char *revision)
 	return rev;
 }
 
-static int
-proc_read(char *page, char **start, off_t off, int count, int *eof,
-	  void *data)
+static int divadidd_proc_show(struct seq_file *m, void *v)
 {
-	int len = 0;
 	char tmprev[32];
 
 	strcpy(tmprev, main_revision);
-	len += sprintf(page + len, "%s\n", DRIVERNAME);
-	len += sprintf(page + len, "name     : %s\n", DRIVERLNAME);
-	len += sprintf(page + len, "release  : %s\n", DRIVERRELEASE_DIDD);
-	len += sprintf(page + len, "build    : %s(%s)\n",
+	seq_printf(m, "%s\n", DRIVERNAME);
+	seq_printf(m, "name     : %s\n", DRIVERLNAME);
+	seq_printf(m, "release  : %s\n", DRIVERRELEASE_DIDD);
+	seq_printf(m, "build    : %s(%s)\n",
 		       diva_didd_common_code_build, DIVA_BUILD);
-	len += sprintf(page + len, "revision : %s\n", getrev(tmprev));
-
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+	seq_printf(m, "revision : %s\n", getrev(tmprev));
+
+	return 0;
 }
 
+static int divadidd_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, divadidd_proc_show, NULL);
+}
+
+static const struct file_operations divadidd_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= divadidd_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 static int DIVA_INIT_FUNCTION create_proc(void)
 {
 	proc_net_eicon = proc_mkdir("eicon", init_net.proc_net);
 
 	if (proc_net_eicon) {
-		if ((proc_didd =
-		     create_proc_entry(DRIVERLNAME, S_IFREG | S_IRUGO,
-				       proc_net_eicon))) {
-			proc_didd->read_proc = proc_read;
-		}
+		proc_didd = proc_create(DRIVERLNAME, S_IRUGO, proc_net_eicon,
+					&divadidd_proc_fops);
 		return (1);
 	}
 	return (0);
diff --git a/drivers/isdn/hardware/eicon/divasi.c 
b/drivers/isdn/hardware/eicon/divasi.c
index 69e71eb..f577719 100644
--- a/drivers/isdn/hardware/eicon/divasi.c
+++ b/drivers/isdn/hardware/eicon/divasi.c
@@ -17,6 +17,7 @@ 
 #include <linux/poll.h>
 #include <linux/proc_fs.h>
 #include <linux/skbuff.h>
+#include <linux/seq_file.h>
 #include <linux/smp_lock.h>
 #include <asm/uaccess.h>
 
@@ -86,39 +87,40 @@  static void diva_um_timer_function(unsigned long data);
 extern struct proc_dir_entry *proc_net_eicon;
 static struct proc_dir_entry *um_idi_proc_entry = NULL;
 
-static int
-um_idi_proc_read(char *page, char **start, off_t off, int count, int *eof,
-		 void *data)
+static int um_idi_proc_show(struct seq_file *m, void *v)
 {
-	int len = 0;
 	char tmprev[32];
 
-	len += sprintf(page + len, "%s\n", DRIVERNAME);
-	len += sprintf(page + len, "name     : %s\n", DRIVERLNAME);
-	len += sprintf(page + len, "release  : %s\n", DRIVERRELEASE_IDI);
+	seq_printf(m, "%s\n", DRIVERNAME);
+	seq_printf(m, "name     : %s\n", DRIVERLNAME);
+	seq_printf(m, "release  : %s\n", DRIVERRELEASE_IDI);
 	strcpy(tmprev, main_revision);
-	len += sprintf(page + len, "revision : %s\n", getrev(tmprev));
-	len += sprintf(page + len, "build    : %s\n", DIVA_BUILD);
-	len += sprintf(page + len, "major    : %d\n", major);
-
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+	seq_printf(m, "revision : %s\n", getrev(tmprev));
+	seq_printf(m, "build    : %s\n", DIVA_BUILD);
+	seq_printf(m, "major    : %d\n", major);
+
+	return 0;
+}
+
+static int um_idi_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, um_idi_proc_show, NULL);
 }
 
+static const struct file_operations um_idi_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= um_idi_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 static int DIVA_INIT_FUNCTION create_um_idi_proc(void)
 {
-	um_idi_proc_entry = create_proc_entry(DRIVERLNAME,
-					      S_IFREG | S_IRUGO | S_IWUSR,
-					      proc_net_eicon);
+	um_idi_proc_entry = proc_create(DRIVERLNAME, S_IRUGO, proc_net_eicon,
+					&um_idi_proc_fops);
 	if (!um_idi_proc_entry)
 		return (0);
-
-	um_idi_proc_entry->read_proc = um_idi_proc_read;
-
 	return (1);
 }
 
diff --git a/drivers/isdn/hardware/eicon/divasproc.c 
b/drivers/isdn/hardware/eicon/divasproc.c
index 0408272..46d44a9 100644
--- a/drivers/isdn/hardware/eicon/divasproc.c
+++ b/drivers/isdn/hardware/eicon/divasproc.c
@@ -14,6 +14,7 @@ 
 #include <linux/kernel.h>
 #include <linux/poll.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/list.h>
 #include <asm/uaccess.h>
 
@@ -141,14 +142,10 @@  void remove_divas_proc(void)
 	}
 }
 
-/*
-** write group_optimization 
-*/
-static int
-write_grp_opt(struct file *file, const char __user *buffer, unsigned long 
count,
-	      void *data)
+static ssize_t grp_opt_proc_write(struct file *file, const char __user 
*buffer,
+				  size_t count, loff_t *pos)
 {
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = PDE(file->f_path.dentry->d_inode)->data;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 
 	if ((count == 1) || (count == 2)) {
@@ -172,14 +169,10 @@  write_grp_opt(struct file *file, const char __user 
*buffer, unsigned long count,
 	return (-EINVAL);
 }
 
-/*
-** write dynamic_l1_down
-*/
-static int
-write_d_l1_down(struct file *file, const char __user *buffer, unsigned long 
count,
-		void *data)
+static ssize_t d_l1_down_proc_write(struct file *file, const char __user 
*buffer,
+				    size_t count, loff_t *pos)
 {
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = PDE(file->f_path.dentry->d_inode)->data;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 
 	if ((count == 1) || (count == 2)) {
@@ -203,63 +196,62 @@  write_d_l1_down(struct file *file, const char __user 
*buffer, unsigned long coun
 	return (-EINVAL);
 }
 
-
-/*
-** read dynamic_l1_down 
-*/
-static int
-read_d_l1_down(char *page, char **start, off_t off, int count, int *eof,
-	       void *data)
+static int d_l1_down_proc_show(struct seq_file *m, void *v)
 {
-	int len = 0;
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = m->private;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 
-	len += sprintf(page + len, "%s\n",
+	seq_printf(m, "%s\n",
 		       (IoAdapter->capi_cfg.
 			cfg_1 & DIVA_XDI_CAPI_CFG_1_DYNAMIC_L1_ON) ? "1" :
 		       "0");
+	return 0;
+}
 
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+static int d_l1_down_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, d_l1_down_proc_show, PDE(inode)->data);
 }
 
-/*
-** read group_optimization
-*/
-static int
-read_grp_opt(char *page, char **start, off_t off, int count, int *eof,
-	     void *data)
+static const struct file_operations d_l1_down_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= d_l1_down_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= d_l1_down_proc_write,
+};
+
+static int grp_opt_proc_show(struct seq_file *m, void *v)
 {
-	int len = 0;
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = m->private;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 
-	len += sprintf(page + len, "%s\n",
+	seq_printf(m, "%s\n",
 		       (IoAdapter->capi_cfg.
 			cfg_1 & DIVA_XDI_CAPI_CFG_1_GROUP_POPTIMIZATION_ON)
 		       ? "1" : "0");
+	return 0;
+}
 
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+static int grp_opt_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, grp_opt_proc_show, PDE(inode)->data);
 }
 
-/*
-** info write
-*/
-static int
-info_write(struct file *file, const char __user *buffer, unsigned long count,
-	   void *data)
+static const struct file_operations grp_opt_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= grp_opt_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= grp_opt_proc_write,
+};
+
+static ssize_t info_proc_write(struct file *file, const char __user *buffer,
+			       size_t count, loff_t *pos)
 {
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = PDE(file->f_path.dentry->d_inode)->data;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 	char c[4];
 
@@ -277,63 +269,46 @@  info_write(struct file *file, const char __user *buffer, 
unsigned long count,
 	return (-EINVAL);
 }
 
-/*
-** info read
-*/
-static int
-info_read(char *page, char **start, off_t off, int count, int *eof,
-	  void *data)
+static int info_proc_show(struct seq_file *m, void *v)
 {
 	int i = 0;
-	int len = 0;
 	char *p;
 	char tmpser[16];
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = m->private;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 
-	len +=
-	    sprintf(page + len, "Name        : %s\n",
-		    IoAdapter->Properties.Name);
-	len += sprintf(page + len, "DSP state   : %08x\n", a->dsp_mask);
-	len += sprintf(page + len, "Channels    : %02d\n",
-		       IoAdapter->Properties.Channels);
-	len += sprintf(page + len, "E. max/used : %03d/%03d\n",
+	seq_printf(m, "Name        : %s\n", IoAdapter->Properties.Name);
+	seq_printf(m, "DSP state   : %08x\n", a->dsp_mask);
+	seq_printf(m, "Channels    : %02d\n", IoAdapter->Properties.Channels);
+	seq_printf(m, "E. max/used : %03d/%03d\n",
 		       IoAdapter->e_max, IoAdapter->e_count);
 	diva_get_vserial_number(IoAdapter, tmpser);
-	len += sprintf(page + len, "Serial      : %s\n", tmpser);
-	len +=
-	    sprintf(page + len, "IRQ         : %d\n",
-		    IoAdapter->irq_info.irq_nr);
-	len += sprintf(page + len, "CardIndex   : %d\n", a->CardIndex);
-	len += sprintf(page + len, "CardOrdinal : %d\n", a->CardOrdinal);
-	len += sprintf(page + len, "Controller  : %d\n", a->controller);
-	len += sprintf(page + len, "Bus-Type    : %s\n",
+	seq_printf(m, "Serial      : %s\n", tmpser);
+	seq_printf(m, "IRQ         : %d\n", IoAdapter->irq_info.irq_nr);
+	seq_printf(m, "CardIndex   : %d\n", a->CardIndex);
+	seq_printf(m, "CardOrdinal : %d\n", a->CardOrdinal);
+	seq_printf(m, "Controller  : %d\n", a->controller);
+	seq_printf(m, "Bus-Type    : %s\n",
 		       (a->Bus ==
 			DIVAS_XDI_ADAPTER_BUS_ISA) ? "ISA" : "PCI");
-	len += sprintf(page + len, "Port-Name   : %s\n", a->port_name);
+	seq_printf(m, "Port-Name   : %s\n", a->port_name);
 	if (a->Bus == DIVAS_XDI_ADAPTER_BUS_PCI) {
-		len +=
-		    sprintf(page + len, "PCI-bus     : %d\n",
-			    a->resources.pci.bus);
-		len +=
-		    sprintf(page + len, "PCI-func    : %d\n",
-			    a->resources.pci.func);
+		seq_printf(m, "PCI-bus     : %d\n", a->resources.pci.bus);
+		seq_printf(m, "PCI-func    : %d\n", a->resources.pci.func);
 		for (i = 0; i < 8; i++) {
 			if (a->resources.pci.bar[i]) {
-				len +=
-				    sprintf(page + len,
+				seq_printf(m,
 					    "Mem / I/O %d : 0x%x / mapped : 0x%lx",
 					    i, a->resources.pci.bar[i],
 					    (unsigned long) a->resources.
 					    pci.addr[i]);
 				if (a->resources.pci.length[i]) {
-					len +=
-					    sprintf(page + len,
+					seq_printf(m,
 						    " / length : %d",
 						    a->resources.pci.
 						    length[i]);
 				}
-				len += sprintf(page + len, "\n");
+				seq_putc(m, '\n');
 			}
 		}
 	}
@@ -353,16 +328,25 @@  info_read(char *page, char **start, off_t off, int 
count, int *eof,
 	} else {
 		p = "ready";
 	}
-	len += sprintf(page + len, "State       : %s\n", p);
+	seq_printf(m, "State       : %s\n", p);
 
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+	return 0;
+}
+
+static int info_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, info_proc_show, PDE(inode)->data);
 }
 
+static const struct file_operations info_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= info_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= info_proc_write,
+};
+
 /*
 ** adapter proc init/de-init
 */
@@ -380,28 +364,20 @@  int create_adapter_proc(diva_os_xdi_adapter_t * a)
 		return (0);
 	a->proc_adapter_dir = (void *) de;
 
-	if (!(pe =
-	     create_proc_entry(info_proc_name, S_IFREG | S_IRUGO | S_IWUSR, de)))
+	pe = proc_create_data(info_proc_name, S_IRUGO | S_IWUSR, de,
+			      &info_proc_fops, a);
+	if (!pe)
 		return (0);
 	a->proc_info = (void *) pe;
-	pe->write_proc = info_write;
-	pe->read_proc = info_read;
-	pe->data = a;
 
-	if ((pe = create_proc_entry(grp_opt_proc_name,
-			       S_IFREG | S_IRUGO | S_IWUSR, de))) {
+	pe = proc_create_data(grp_opt_proc_name, S_IRUGO | S_IWUSR, de,
+			      &grp_opt_proc_fops, a);
+	if (pe)
 		a->proc_grp_opt = (void *) pe;
-		pe->write_proc = write_grp_opt;
-		pe->read_proc = read_grp_opt;
-		pe->data = a;
-	}
-	if ((pe = create_proc_entry(d_l1_down_proc_name,
-			       S_IFREG | S_IRUGO | S_IWUSR, de))) {
+	pe = proc_create_data(d_l1_down_proc_name, S_IRUGO | S_IWUSR, de,
+			      &d_l1_down_proc_fops, a);
+	if (pe)
 		a->proc_d_l1_down = (void *) pe;
-		pe->write_proc = write_d_l1_down;
-		pe->read_proc = read_d_l1_down;
-		pe->data = a;
-	}
 
 	DBG_TRC(("proc entry %s created", tmp));
 
diff --git a/drivers/isdn/hysdn/hycapi.c b/drivers/isdn/hysdn/hycapi.c
index 4ffaa14..fe874af 100644
--- a/drivers/isdn/hysdn/hycapi.c
+++ b/drivers/isdn/hysdn/hycapi.c
@@ -11,6 +11,8 @@ 
  */
 
 #include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/signal.h>
 #include <linux/kernel.h>
 #include <linux/skbuff.h>
@@ -432,26 +434,16 @@  static u16 hycapi_send_message(struct capi_ctr *ctrl, 
struct sk_buff *skb)
 	return retval;
 }
 
-/*********************************************************************
-hycapi_read_proc
-
-Informations provided in the /proc/capi-entries.
-
-*********************************************************************/
-
-static int hycapi_read_proc(char *page, char **start, off_t off,
-			    int count, int *eof, struct capi_ctr *ctrl)
+static int hycapi_proc_show(struct seq_file *m, void *v)
 {
+	struct capi_ctr *ctrl = m->private;
 	hycapictrl_info *cinfo = (hycapictrl_info *)(ctrl->driverdata);
 	hysdn_card *card = cinfo->card;
-	int len = 0;
 	char *s;
-#ifdef HYCAPI_PRINTFNAMES
-	printk(KERN_NOTICE "hycapi_read_proc\n");    
-#endif
-	len += sprintf(page+len, "%-16s %s\n", "name", cinfo->cardname);
-	len += sprintf(page+len, "%-16s 0x%x\n", "io", card->iobase);
-	len += sprintf(page+len, "%-16s %d\n", "irq", card->irq);
+
+	seq_printf(m, "%-16s %s\n", "name", cinfo->cardname);
+	seq_printf(m, "%-16s 0x%x\n", "io", card->iobase);
+	seq_printf(m, "%-16s %d\n", "irq", card->irq);
     
 	switch (card->brdtype) {
 		case BD_PCCARD:  s = "HYSDN Hycard"; break;
@@ -461,24 +453,32 @@  static int hycapi_read_proc(char *page, char **start, 
off_t off,
 		case BD_PLEXUS: s = "HYSDN Plexus30"; break;
 		default: s = "???"; break;
 	}
-	len += sprintf(page+len, "%-16s %s\n", "type", s);
+	seq_printf(m, "%-16s %s\n", "type", s);
 	if ((s = cinfo->version[VER_DRIVER]) != NULL)
-		len += sprintf(page+len, "%-16s %s\n", "ver_driver", s);
+		seq_printf(m, "%-16s %s\n", "ver_driver", s);
 	if ((s = cinfo->version[VER_CARDTYPE]) != NULL)
-		len += sprintf(page+len, "%-16s %s\n", "ver_cardtype", s);
+		seq_printf(m, "%-16s %s\n", "ver_cardtype", s);
 	if ((s = cinfo->version[VER_SERIAL]) != NULL)
-		len += sprintf(page+len, "%-16s %s\n", "ver_serial", s);
+		seq_printf(m, "%-16s %s\n", "ver_serial", s);
     
-	len += sprintf(page+len, "%-16s %s\n", "cardname", cinfo->cardname);
+	seq_printf(m, "%-16s %s\n", "cardname", cinfo->cardname);
     
-	if (off+count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len-off) ? count : len-off);
+	return 0;
+}
+
+static int hycapi_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, hycapi_proc_show, PDE(inode)->data);
 }
 
+static const struct file_operations hycapi_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= hycapi_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 /**************************************************************
 hycapi_load_firmware
 
@@ -774,7 +774,7 @@  hycapi_capi_create(hysdn_card *card)
 		ctrl->load_firmware = hycapi_load_firmware;
 		ctrl->reset_ctr     = hycapi_reset_ctr;
 		ctrl->procinfo      = hycapi_procinfo;
-		ctrl->ctr_read_proc = hycapi_read_proc;
+		ctrl->proc_fops = &hycapi_proc_fops;
 		strcpy(ctrl->name, cinfo->cardname);
 		ctrl->owner = THIS_MODULE;
 
diff --git a/include/linux/isdn/capilli.h b/include/linux/isdn/capilli.h
index 7acb87a..d3e5e9d 100644
--- a/include/linux/isdn/capilli.h
+++ b/include/linux/isdn/capilli.h
@@ -50,8 +50,7 @@  struct capi_ctr {
 	u16  (*send_message)(struct capi_ctr *, struct sk_buff *skb);
 	
 	char *(*procinfo)(struct capi_ctr *);
-	int (*ctr_read_proc)(char *page, char **start, off_t off,
-			     int count, int *eof, struct capi_ctr *card);
+	const struct file_operations *proc_fops;
 
 	/* filled in before calling ready callback */
 	u8 manu[CAPI_MANUFACTURER_LEN];		/* CAPI_GET_MANUFACTURER */
diff --git a/net/bluetooth/cmtp/capi.c b/net/bluetooth/cmtp/capi.c
index 97f8d68..3487cfe 100644
--- a/net/bluetooth/cmtp/capi.c
+++ b/net/bluetooth/cmtp/capi.c
@@ -21,7 +21,8 @@ 
 */
 
 #include <linux/module.h>
-
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
@@ -516,33 +517,37 @@  static char *cmtp_procinfo(struct capi_ctr *ctrl)
 	return "CAPI Message Transport Protocol";
 }
 
-static int cmtp_ctr_read_proc(char *page, char **start, off_t off, int count, 
int *eof, struct capi_ctr *ctrl)
+static int cmtp_proc_show(struct seq_file *m, void *v)
 {
+	struct capi_ctr *ctrl = m->private;
 	struct cmtp_session *session = ctrl->driverdata;
 	struct cmtp_application *app;
 	struct list_head *p, *n;
-	int len = 0;
 
-	len += sprintf(page + len, "%s\n\n", cmtp_procinfo(ctrl));
-	len += sprintf(page + len, "addr %s\n", session->name);
-	len += sprintf(page + len, "ctrl %d\n", session->num);
+	seq_printf(m, "%s\n\n", cmtp_procinfo(ctrl));
+	seq_printf(m, "addr %s\n", session->name);
+	seq_printf(m, "ctrl %d\n", session->num);
 
 	list_for_each_safe(p, n, &session->applications) {
 		app = list_entry(p, struct cmtp_application, list);
-		len += sprintf(page + len, "appl %d -> %d\n", app->appl, app->mapping);
+		seq_printf(m, "appl %d -> %d\n", app->appl, app->mapping);
 	}
 
-	if (off + count >= len)
-		*eof = 1;
-
-	if (len < off)
-		return 0;
-
-	*start = page + off;
+	return 0;
+}
 
-	return ((count < len - off) ? count : len - off);
+static int cmtp_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cmtp_proc_show, PDE(inode)->data);
 }
 
+static const struct file_operations cmtp_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cmtp_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
 
 int cmtp_attach_device(struct cmtp_session *session)