[PATCH -tip v2 10/10] tracing: Remove kretprobe unknown indicator from stacktrace

[Masami Hiramatsu]

Since the stacktrace API fixup the kretprobed address correctly,
there is no need to convert the "kretprobe_trampoline" to
 "[unknown/kretprobe'd]" anymore. Remove it.

Signed-off-by: Masami Hiramatsu <mhira...@kernel.org>
Acked-by: Steven Rostedt (VMware) <rost...@goodmis.org>
---
 kernel/trace/trace_output.c |   27 ++++-----------------------
 1 file changed, 4 insertions(+), 23 deletions(-)

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 61255bad7e01..f5f8b081b668 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -346,37 +346,18 @@ int trace_output_call(struct trace_iterator *iter, char 
*name, char *fmt, ...)
 }
 EXPORT_SYMBOL_GPL(trace_output_call);
 
-#ifdef CONFIG_KRETPROBES
-static inline const char *kretprobed(const char *name)
-{
-       static const char tramp_name[] = "kretprobe_trampoline";
-       int size = sizeof(tramp_name);
-
-       if (strncmp(tramp_name, name, size) == 0)
-               return "[unknown/kretprobe'd]";
-       return name;
-}
-#else
-static inline const char *kretprobed(const char *name)
-{
-       return name;
-}
-#endif /* CONFIG_KRETPROBES */
-
 void
 trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset)
 {
 #ifdef CONFIG_KALLSYMS
-       char str[KSYM_SYMBOL_LEN];
-       const char *name;
+       char name[KSYM_SYMBOL_LEN];
 
        if (offset)
-               sprint_symbol(str, address);
+               sprint_symbol(name, address);
        else
-               kallsyms_lookup(address, NULL, NULL, NULL, str);
-       name = kretprobed(str);
+               kallsyms_lookup(address, NULL, NULL, NULL, name);
 
-       if (name && strlen(name)) {
+       if (strlen(name)) {
                trace_seq_puts(s, name);
                return;
        }