trace/probes: Remove kernel doc style from non kernel doc comment

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

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index aac7847c02142560e046e74a60d0123c146b1784..fa79323331b22f327872ae41e185a17562f6d78a 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3701,6 +3701,31 @@ enter_record(struct ftrace_hash *hash, struct dyn_ftrace *rec, int clear_filter)
        return ret;
 }
 
+static int
+add_rec_by_index(struct ftrace_hash *hash, struct ftrace_glob *func_g,
+                int clear_filter)
+{
+       long index = simple_strtoul(func_g->search, NULL, 0);
+       struct ftrace_page *pg;
+       struct dyn_ftrace *rec;
+
+       /* The index starts at 1 */
+       if (--index < 0)
+               return 0;
+
+       do_for_each_ftrace_rec(pg, rec) {
+               if (pg->index <= index) {
+                       index -= pg->index;
+                       /* this is a double loop, break goes to the next page */
+                       break;
+               }
+               rec = &pg->records[index];
+               enter_record(hash, rec, clear_filter);
+               return 1;
+       } while_for_each_ftrace_rec();
+       return 0;
+}
+
 static int
 ftrace_match_record(struct dyn_ftrace *rec, struct ftrace_glob *func_g,
                struct ftrace_glob *mod_g, int exclude_mod)
@@ -3769,6 +3794,11 @@ match_records(struct ftrace_hash *hash, char *func, int len, char *mod)
        if (unlikely(ftrace_disabled))
                goto out_unlock;
 
+       if (func_g.type == MATCH_INDEX) {
+               found = add_rec_by_index(hash, &func_g, clear_filter);
+               goto out_unlock;
+       }
+
        do_for_each_ftrace_rec(pg, rec) {
 
                if (rec->flags & FTRACE_FL_DISABLED)