linux-kernel - [PATCH -next] tracing: Using for_each_set

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Date:	Mon,  4 Jul 2016 15:10:04 +0000
From:	weiyj_lk@....com
To:	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...hat.com>
Cc:	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	linux-kernel@...r.kernel.org
Subject: [PATCH -next] tracing: Using for_each_set_bit to simplify the code

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Using for_each_set_bit() to simplify the code.

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 kernel/trace/trace.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 3d9f31b..48fce20 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++;
 		}
 	}