tracing: Using for_each_set_bit() to simplify trace_pid_write()

Using for_each_set_bit() to simplify the code.

Link: http://lkml.kernel.org/r/1467645004-11169-1-git-send-email-weiyj_lk@163.com
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 5fd53a7847bc9df2db62aadda648aa6831569ec9..dade4c9559cc036c1b6aa8567abf0b0887847923 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -517,13 +517,9 @@ int trace_pid_write(struct trace_pid_list *filtered_pids,
 
        if (filtered_pids) {
                /* copy the current bits to the new max */
-               pid = find_first_bit(filtered_pids->pids,
-                                    filtered_pids->pid_max);
-               while (pid < filtered_pids->pid_max) {
+               for_each_set_bit(pid, filtered_pids->pids,
+                                filtered_pids->pid_max) {
                        set_bit(pid, pid_list->pids);
-                       pid = find_next_bit(filtered_pids->pids,
-                                           filtered_pids->pid_max,
-                                           pid + 1);
                        nr_pids++;
                }
        }