linux-kernel - [PATCH 02/16] tty: remove flags from struct tty_ldisc

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Date:   Tue, 14 Sep 2021 11:11:20 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     gregkh@...uxfoundation.org
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 02/16] tty: remove flags from struct tty_ldisc_ops

The last user was apparently removed by commit a352def21a64 (tty: Ldisc
revamp) in 2008. So remove the field completely, the only setter
(n_tty_inherit_ops) and also its only possible value
(LDISC_FLAG_DEFINED).

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/tty/n_tty.c       | 1 -
 include/linux/tty_ldisc.h | 3 ---
 2 files changed, 4 deletions(-)

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 0965793dfe4f..dcb5e6ef8747 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -2450,7 +2450,6 @@ void n_tty_inherit_ops(struct tty_ldisc_ops *ops)
 {
 	*ops = n_tty_ops;
 	ops->owner = NULL;
-	ops->flags = 0;
 }
 EXPORT_SYMBOL_GPL(n_tty_inherit_ops);
 
diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index b1d812e902aa..1f37184eee63 100644
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -180,7 +180,6 @@ extern int ldsem_down_write_nested(struct ld_semaphore *sem, int subclass,
 struct tty_ldisc_ops {
 	char	*name;
 	int	num;
-	int	flags;
 
 	/*
 	 * The following routines are called from above.
@@ -220,8 +219,6 @@ struct tty_ldisc {
 	struct tty_struct *tty;
 };
 
-#define LDISC_FLAG_DEFINED	0x00000001
-
 #define MODULE_ALIAS_LDISC(ldisc) \
 	MODULE_ALIAS("tty-ldisc-" __stringify(ldisc))
 
-- 
2.33.0