proc_fops: convert drivers/isdn/ to seq_file

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>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 4 deletions

diff --git a/Documentation/isdn/INTERFACE.CAPI b/Documentation/isdn/INTERFACE.CAPI
index 5fe8de5cc727..f172091fb7cd 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.