1 files changed, 21 insertions, 18 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 85bee775a03..9f3b478f917 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1088,17 +1088,20 @@ static void s_stop(struct seq_file *m, void *p)
         mutex_unlock(&trace_types_lock);
 }
 
-#define KRETPROBE_MSG "[unknown/kretprobe'd]"
-
 #ifdef CONFIG_KRETPROBES
-static inline int kretprobed(unsigned long addr)
+static inline const char *kretprobed(const char *name)
 {
-        return addr == (unsigned long)kretprobe_trampoline;
+        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 int kretprobed(unsigned long addr)
+static inline const char *kretprobed(const char *name)
 {
-        return 0;
+        return name;
 }
 #endif /* CONFIG_KRETPROBES */
 
@@ -1107,10 +1110,13 @@ seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
 {
 #ifdef CONFIG_KALLSYMS
         char str[KSYM_SYMBOL_LEN];
+        const char *name;
 
         kallsyms_lookup(address, NULL, NULL, NULL, str);
 
-        return trace_seq_printf(s, fmt, str);
+        name = kretprobed(str);
+
+        return trace_seq_printf(s, fmt, name);
 #endif
         return 1;
 }
@@ -1121,9 +1127,12 @@ seq_print_sym_offset(struct trace_seq *s, const char *fmt,
 {
 #ifdef CONFIG_KALLSYMS
         char str[KSYM_SYMBOL_LEN];
+        const char *name;
 
         sprint_symbol(str, address);
-        return trace_seq_printf(s, fmt, str);
+        name = kretprobed(str);
+
+        return trace_seq_printf(s, fmt, name);
 #endif
         return 1;
 }
@@ -1377,10 +1386,7 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
 
                 seq_print_ip_sym(s, field->ip, sym_flags);
                 trace_seq_puts(s, " (");
-                if (kretprobed(field->parent_ip))
-                        trace_seq_puts(s, KRETPROBE_MSG);
-                else
-                        seq_print_ip_sym(s, field->parent_ip, sym_flags);
+                seq_print_ip_sym(s, field->parent_ip, sym_flags);
                 trace_seq_puts(s, ")\n");
                 break;
         }
@@ -1496,12 +1502,9 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
                         ret = trace_seq_printf(s, " <-");
                         if (!ret)
                                 return TRACE_TYPE_PARTIAL_LINE;
-                        if (kretprobed(field->parent_ip))
-                                ret = trace_seq_puts(s, KRETPROBE_MSG);
-                        else
-                                ret = seq_print_ip_sym(s,
-                                                       field->parent_ip,
-                                                       sym_flags);
+                        ret = seq_print_ip_sym(s,
+                                               field->parent_ip,
+                                               sym_flags);
                         if (!ret)
                                 return TRACE_TYPE_PARTIAL_LINE;
                 }