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/nfsd/vfs.c b/fs/nfsd/vfs.c
index 46934c9..d019918 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1029,13 +1029,13 @@
 		if (EX_WGATHER(exp)) {
 			if (atomic_read(&inode->i_writecount) > 1
 			    || (last_ino == inode->i_ino && last_dev == inode->i_sb->s_dev)) {
-				dprintk("nfsd: write defer %d\n", current->pid);
+				dprintk("nfsd: write defer %d\n", task_pid_nr(current));
 				msleep(10);
-				dprintk("nfsd: write resume %d\n", current->pid);
+				dprintk("nfsd: write resume %d\n", task_pid_nr(current));
 			}
 
 			if (inode->i_state & I_DIRTY) {
-				dprintk("nfsd: write sync %d\n", current->pid);
+				dprintk("nfsd: write sync %d\n", task_pid_nr(current));
 				host_err=nfsd_sync(file);
 			}
 #if 0