From a6d403ac96893cb5c5812c2d75de082795f02e5f Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 25 Jun 2015 15:01:33 -0700 Subject: [PATCH] netconsole: remove unnecessary netconsole_target_get/out() from write_msg() write_msg() grabs target_list_lock and walks target_list invoking netpool_send_udp() on each target. Curiously, it protects each iteration with netconsole_target_get/put() even though it never releases target_list_lock which protects all the members. While this doesn't harm anything, it doesn't serve any purpose either. The items on the list can't go away while target_list_lock is held. Remove the unnecessary get/put pair. Signed-off-by: Tejun Heo Cc: David Miller Cc: Kay Sievers Cc: Petr Mladek Cc: Tetsuo Handa Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/net/netconsole.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c index 15731d1db918..30c0524d7016 100644 --- a/drivers/net/netconsole.c +++ b/drivers/net/netconsole.c @@ -744,7 +744,6 @@ static void write_msg(struct console *con, const char *msg, unsigned int len) spin_lock_irqsave(&target_list_lock, flags); list_for_each_entry(nt, &target_list, list) { - netconsole_target_get(nt); if (nt->enabled && netif_running(nt->np.dev)) { /* * We nest this inside the for-each-target loop above @@ -760,7 +759,6 @@ static void write_msg(struct console *con, const char *msg, unsigned int len) left -= frag; } } - netconsole_target_put(nt); } spin_unlock_irqrestore(&target_list_lock, flags); }