mm/slab: Give s_next and s_stop slab-specific names

Give s_next and s_stop slab-specific names instead of exporting
"s_next" and "s_stop".

Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
diff --git a/mm/slab.h b/mm/slab.h
index 95c8860..620ceed 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -272,5 +272,5 @@
 
 };
 
-void *s_next(struct seq_file *m, void *p, loff_t *pos);
-void s_stop(struct seq_file *m, void *p);
+void *slab_next(struct seq_file *m, void *p, loff_t *pos);
+void slab_stop(struct seq_file *m, void *p);