1 files changed, 44 insertions, 0 deletions

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index b77b9a697619..692bf7184c8c 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -177,6 +177,50 @@ ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
 }
 EXPORT_SYMBOL(ftrace_print_hex_seq);
 
+const char *
+ftrace_print_array_seq(struct trace_seq *p, const void *buf, int buf_len,
+                       size_t el_size)
+{
+        const char *ret = trace_seq_buffer_ptr(p);
+        const char *prefix = "";
+        void *ptr = (void *)buf;
+
+        trace_seq_putc(p, '{');
+
+        while (ptr < buf + buf_len) {
+                switch (el_size) {
+                case 1:
+                        trace_seq_printf(p, "%s0x%x", prefix,
+                                         *(u8 *)ptr);
+                        break;
+                case 2:
+                        trace_seq_printf(p, "%s0x%x", prefix,
+                                         *(u16 *)ptr);
+                        break;
+                case 4:
+                        trace_seq_printf(p, "%s0x%x", prefix,
+                                         *(u32 *)ptr);
+                        break;
+                case 8:
+                        trace_seq_printf(p, "%s0x%llx", prefix,
+                                         *(u64 *)ptr);
+                        break;
+                default:
+                        trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size,
+                                         *(u8 *)ptr);
+                        el_size = 1;
+                }
+                prefix = ",";
+                ptr += el_size;
+        }
+
+        trace_seq_putc(p, '}');
+        trace_seq_putc(p, 0);
+
+        return ret;
+}
+EXPORT_SYMBOL(ftrace_print_array_seq);
+
 int ftrace_raw_output_prep(struct trace_iterator *iter,
                            struct trace_event *trace_event)
 {