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printk: add con_printk() macro for console details

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It is useful to generate log messages that include details about
the related console. Rather than duplicate the code to assemble
the details, put that code into a macro con_printk().

Once console printers become threaded, this macro will find more
users.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20220421212250.565456-9-john.ogness@linutronix.de
This commit is contained in:
John Ogness 2022-04-21 23:28:43 +02:06 committed by Petr Mladek
parent 1f47e8af45
commit 1fc0ca9e0d
1 changed files with 7 additions and 6 deletions
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13
kernel/printk/printk.c
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@ -3015,6 +3015,11 @@ static void try_enable_default_console(struct console *newcon)
newcon->flags |= CON_CONSDEV;
}
#define con_printk(lvl, con, fmt, ...) \
printk(lvl pr_fmt("%sconsole [%s%d] " fmt), \
(con->flags & CON_BOOT) ? "boot" : "", \
con->name, con->index, ##__VA_ARGS__)
/*
* The console driver calls this routine during kernel initialization
* to register the console printing procedure with printk() and to
@ -3153,9 +3158,7 @@ void register_console(struct console *newcon)
* users know there might be something in the kernel's log buffer that
* went to the bootconsole (that they do not see on the real console)
*/
pr_info("%sconsole [%s%d] enabled\n",
(newcon->flags & CON_BOOT) ? "boot" : "" ,
newcon->name, newcon->index);
con_printk(KERN_INFO, newcon, "enabled\n");
if (bootcon_enabled &&
((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV) &&
!keep_bootcon) {
@ -3174,9 +3177,7 @@ int unregister_console(struct console *console)
struct console *con;
int res;
pr_info("%sconsole [%s%d] disabled\n",
(console->flags & CON_BOOT) ? "boot" : "" ,
console->name, console->index);
con_printk(KERN_INFO, console, "disabled\n");
res = _braille_unregister_console(console);
if (res < 0)