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>

1 files changed, 2 insertions, 6 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 5fd53a7847bc..dade4c9559cc 100644
--- 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++;
                 }
         }