linux-kernel - [PATCH -next] tty: n_gsm: use DEFINE

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Date:   Tue, 6 Apr 2021 19:56:03 +0800
From:   Huang Guobin <huangguobin4@...wei.com>
To:     <huangguobin4@...wei.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <kernel-janitors@...r.kernel.org>
Subject: [PATCH -next] tty: n_gsm: use DEFINE_SPINLOCK() for spinlock

From: Guobin Huang <huangguobin4@...wei.com>

spinlock can be initialized automatically with DEFINE_SPINLOCK()
rather than explicitly calling spin_lock_init().

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Guobin Huang <huangguobin4@...wei.com>
---
 drivers/tty/n_gsm.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 9e12f9cb1a98..d60cffc70a0c 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -266,7 +266,7 @@ struct gsm_mux {
 
 #define MAX_MUX		4			/* 256 minors */
 static struct gsm_mux *gsm_mux[MAX_MUX];	/* GSM muxes */
-static spinlock_t gsm_mux_lock;
+static DEFINE_SPINLOCK(gsm_mux_lock);
 
 static struct tty_driver *gsm_tty_driver;
 
@@ -3257,8 +3257,6 @@ static int __init gsm_init(void)
 	gsm_tty_driver->init_termios.c_lflag &= ~ECHO;
 	tty_set_operations(gsm_tty_driver, &gsmtty_ops);
 
-	spin_lock_init(&gsm_mux_lock);
-
 	if (tty_register_driver(gsm_tty_driver)) {
 		put_tty_driver(gsm_tty_driver);
 		tty_unregister_ldisc(N_GSM0710);