perf probe: Show need-dwarf message only if it is really needed

Show need-dwarf message only if the probe is really requires
debuginfo analysis. This also use pr_debug for debugging message
instead of pr_warning.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20091215153135.17436.99052.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 11 insertions, 7 deletions

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 919037bc980..438a7bb101d 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -261,15 +261,19 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
 
                 lseek(fd, SEEK_SET, 0);
                 ret = find_probepoint(fd, pp);
-                if (ret < 0) {
-                        if (session.need_dwarf)
-                                die("Could not analyze debuginfo.");
-
-                        pr_warning("An error occurred in debuginfo analysis. Try to use symbols.\n");
-                        break;
-                }
+                if (ret > 0)
+                        continue;
                 if (ret == 0)   /* No error but failed to find probe point. */
                         die("No probe point found.");
+                /* Error path */
+                if (session.need_dwarf) {
+                        if (ret == -ENOENT)
+                                pr_warning("No dwarf info found in the vmlinux - please rebuild with CONFIG_DEBUG_INFO=y.\n");
+                        die("Could not analyze debuginfo.");
+                }
+                pr_debug("An error occurred in debuginfo analysis."
+                         " Try to use symbols.\n");
+                break;
         }
         close(fd);