propogate_mnt: Handle the first propogated copy being a slave

[deliverable/linux.git] / kernel / trace / trace_printk.c

diff --git a/kernel/trace/trace_printk.c b/kernel/trace/trace_printk.c
index 060df67dbdd1d038dba8ec35909890f3e892b6d7..f96f0383f6c6bfe40cba9226b97f8885723a4d9d 100644 (file)
--- a/kernel/trace/trace_printk.c
+++ b/kernel/trace/trace_printk.c
@@ -296,6 +296,9 @@ static int t_show(struct seq_file *m, void *v)
        const char *str = *fmt;
        int i;
 
+       if (!*fmt)
+               return 0;
+
        seq_printf(m, "0x%lx : \"", *(unsigned long *)fmt);
 
        /*