Use helpers to obtain task pid in printks

The task_struct->pid member is going to be deprecated, so start
using the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in
the kernel.

The first thing to start with is the pid, printed to dmesg - in
this case we may safely use task_pid_nr(). Besides, printks produce
more (much more) than a half of all the explicit pid usage.

[akpm@linux-foundation.org: git-drm went and changed lots of stuff]
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Dave Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index 6438941..4f74154 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -456,7 +456,7 @@
 		printk(KERN_DEBUG "dlm: process %s (%d) version mismatch "
 		       "user (%d.%d.%d) kernel (%d.%d.%d)\n",
 		       current->comm,
-		       current->pid,
+		       task_pid_nr(current),
 		       req->version[0],
 		       req->version[1],
 		       req->version[2],