[PATCH v2 3.5/5] trace/kprobes: Add back warning about offset in return probes

[Steven Rostedt (VMware)]

Let's not remove the warning about offsets and return probes when the
offset is invalid.

Signed-off-by: Steven Rostedt (VMware) <rost...@goodmis.org>
---
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 3f4f788..f626235 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -695,6 +695,11 @@ static int create_trace_kprobe(int argc, char **argv)
                        pr_info("Failed to parse symbol.\n");
                        return ret;
                }
+               if (offset && is_return &&
+                   !arch_function_offset_within_entry(offset)) {
+                       pr_info("Given offset is not valid for return 
probe.\n");
+                       return -EINVAL;
+               }
        }
        argc -= 2; argv += 2;