[GFS2] Audit printk and kmalloc

All printk calls now have KERN_ set where required and a couple of
kmalloc(), memset(.., 0, ...) calls changed to kzalloc().

This is in response to comments from:
Pekka Enberg <penberg@cs.helsinki.fi> and
Eric Sesterhenn <snakebyte@gmx.de>

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 751178a..a85f1a2 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -772,13 +772,13 @@
 
 	sdp = init_sbd(sb);
 	if (!sdp) {
-		printk("GFS2: can't alloc struct gfs2_sbd\n");
+		printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n");
 		return -ENOMEM;
 	}
 
 	error = gfs2_mount_args(sdp, (char *)data, 0);
 	if (error) {
-		printk("GFS2: can't parse mount arguments\n");
+		printk(KERN_WARNING "GFS2: can't parse mount arguments\n");
 		goto fail;
 	}