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/net/ipv4/ipvs/ip_vs_sync.c b/net/ipv4/ipvs/ip_vs_sync.c
index 1960747..3b0d322 100644
--- a/net/ipv4/ipvs/ip_vs_sync.c
+++ b/net/ipv4/ipvs/ip_vs_sync.c
@@ -877,7 +877,7 @@
 	if (!tinfo)
 		return -ENOMEM;
 
-	IP_VS_DBG(7, "%s: pid %d\n", __FUNCTION__, current->pid);
+	IP_VS_DBG(7, "%s: pid %d\n", __FUNCTION__, task_pid_nr(current));
 	IP_VS_DBG(7, "Each ip_vs_sync_conn entry need %Zd bytes\n",
 		  sizeof(struct ip_vs_sync_conn));
 
@@ -917,7 +917,7 @@
 	    (state == IP_VS_STATE_BACKUP && !sync_backup_pid))
 		return -ESRCH;
 
-	IP_VS_DBG(7, "%s: pid %d\n", __FUNCTION__, current->pid);
+	IP_VS_DBG(7, "%s: pid %d\n", __FUNCTION__, task_pid_nr(current));
 	IP_VS_INFO("stopping sync thread %d ...\n",
 		   (state == IP_VS_STATE_MASTER) ?
 		   sync_master_pid : sync_backup_pid);