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printk: Remove write only variable nr_ext_console_drivers 

Commit a699449bb1 ("printk: refactor and rework printing logic")
removed the need for @nr_ext_console_drivers. Remove the unneeded
variable.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20220924000454.3319186-4-john.ogness@linutronix.de
This commit is contained in:
Thomas Gleixner 2022-09-24 02:10:39 +02:06 committed by Petr Mladek
parent e3f12f0602
commit 7fc11a521e
1 changed files with 0 additions and 9 deletions
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9
kernel/printk/printk.c
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@ -220,9 +220,6 @@ int devkmsg_sysctl_set_loglvl(struct ctl_table *table, int write,
}
#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 *newcon)
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 *console)
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.