cifs: warn about deprecation of /proc/fs/cifs/OplockEnabled interface

The plan is to deprecate this interface by kernel version 3.4.

Changes since v1
   - add a '\n' to the printk.

Reported-by: Alexander Swen <alex@swen.nu>
Cc: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <smfrench@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index e1715313f398..84e8c0724704 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -526,6 +526,9 @@ static ssize_t cifs_oplock_proc_write(struct file *file,
         char c;
         int rc;
 
+        printk(KERN_WARNING "CIFS: The /proc/fs/cifs/OplockEnabled interface "
+               "will be removed in kernel version 3.4. Please migrate to "
+               "using the 'enable_oplocks' module parameter in cifs.ko.\n");
         rc = get_user(c, buffer);
         if (rc)
                 return rc;