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/include/net/9p/9p.h b/include/net/9p/9p.h
index 686425a..625346c 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -44,7 +44,7 @@
 do {  \
 	if ((p9_debug_level & level) == level) \
 		printk(KERN_NOTICE "-- %s (%d): " \
-		format , __FUNCTION__, current->pid , ## arg); \
+		format , __FUNCTION__, task_pid_nr(current) , ## arg); \
 } while (0)
 
 #define PRINT_FCALL_ERROR(s, fcall) P9_DPRINTK(P9_DEBUG_ERROR,   \
@@ -59,7 +59,7 @@
 #define P9_EPRINTK(level, format, arg...) \
 do { \
 	printk(level "9p: %s (%d): " \
-		format , __FUNCTION__, current->pid , ## arg); \
+		format , __FUNCTION__, task_pid_nr(current), ## arg); \
 } while (0)