linux-kernel - [patch RFC 03/29] printk: Remove write only variable nr_ext_console

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Message-ID: <20220910222300.524466942@linutronix.de>
Date:   Sun, 11 Sep 2022 00:27:36 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     John Ogness <john.ogness@...utronix.de>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Linus Torvalds <torvalds@...uxfoundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Helge Deller <deller@....de>,
        Jason Wessel <jason.wessel@...driver.com>,
        Daniel Thompson <daniel.thompson@...aro.org>
Subject: [patch RFC 03/29] printk: Remove write only variable nr_ext_console_drivers

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/printk/printk.c |    9 ---------
 1 file changed, 9 deletions(-)

--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -220,9 +220,6 @@ int devkmsg_sysctl_set_loglvl(struct ctl
 }
 #endif /* CONFIG_PRINTK && CONFIG_SYSCTL */
 
-/* Number of registered extended console drivers. */
-static int nr_ext_console_drivers;
-
 /*
  * Helper macros to handle lockdep when locking/unlocking console_sem. We use
  * macros instead of functions so that _RET_IP_ contains useful information.
@@ -3188,9 +3185,6 @@ void register_console(struct console *ne
 		console_drivers->next = newcon;
 	}
 
-	if (newcon->flags & CON_EXTENDED)
-		nr_ext_console_drivers++;
-
 	newcon->dropped = 0;
 	if (newcon->flags & CON_PRINTBUFFER) {
 		/* Get a consistent copy of @syslog_seq. */
@@ -3256,9 +3250,6 @@ int unregister_console(struct console *c
 	if (res)
 		goto out_disable_unlock;
 
-	if (console->flags & CON_EXTENDED)
-		nr_ext_console_drivers--;
-
 	/*
 	 * If this isn't the last console and it has CON_CONSDEV set, we
 	 * need to set it on the next preferred console.