bpf: make jited programs visible in traces

[linux.git] / kernel / trace / trace_output.c

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 5d33a7352919853e3d586f20a84f8d12b3d88bbb..aea6a1218c7db6bc7eb307a5ed4630d0b2542640 100644 (file)
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -162,15 +162,27 @@ trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
 }
 EXPORT_SYMBOL_GPL(trace_print_bitmask_seq);
 
+/**
+ * trace_print_hex_seq - print buffer as hex sequence
+ * @p: trace seq struct to write to
+ * @buf: The buffer to print
+ * @buf_len: Length of @buf in bytes
+ * @concatenate: Print @buf as single hex string or with spacing
+ *
+ * Prints the passed buffer as a hex sequence either as a whole,
+ * single hex string if @concatenate is true or with spacing after
+ * each byte in case @concatenate is false.
+ */
 const char *
-trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
+trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len,
+                   bool concatenate)
 {
        int i;
        const char *ret = trace_seq_buffer_ptr(p);
 
        for (i = 0; i < buf_len; i++)
-               trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
-
+               trace_seq_printf(p, "%s%2.2x", concatenate || i == 0 ? "" : " ",
+                                buf[i]);
        trace_seq_putc(p, 0);
 
        return ret;