From: John Ogness Date: Wed, 4 Sep 2024 14:11:32 +0206 Subject: [PATCH 50/54] proc: Add nbcon support for /proc/consoles Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.11/older/patches-6.11-rt7.tar.xz Update /proc/consoles output to show 'W' if an nbcon console is registered. Since the write_thread() callback is mandatory, it enough just to check if it is an nbcon console. Also update /proc/consoles output to show 'N' if it is an nbcon console. Signed-off-by: John Ogness Reviewed-by: Petr Mladek Link: https://lore.kernel.org/r/20240904120536.115780-14-john.ogness@linutronix.de Signed-off-by: Petr Mladek Signed-off-by: Sebastian Andrzej Siewior --- fs/proc/consoles.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/fs/proc/consoles.c +++ b/fs/proc/consoles.c @@ -21,6 +21,7 @@ static int show_console_dev(struct seq_f { CON_ENABLED, 'E' }, { CON_CONSDEV, 'C' }, { CON_BOOT, 'B' }, + { CON_NBCON, 'N' }, { CON_PRINTBUFFER, 'p' }, { CON_BRL, 'b' }, { CON_ANYTIME, 'a' }, @@ -58,8 +59,8 @@ static int show_console_dev(struct seq_f seq_printf(m, "%s%d", con->name, con->index); seq_pad(m, ' '); seq_printf(m, "%c%c%c (%s)", con->read ? 'R' : '-', - con->write ? 'W' : '-', con->unblank ? 'U' : '-', - flags); + ((con->flags & CON_NBCON) || con->write) ? 'W' : '-', + con->unblank ? 'U' : '-', flags); if (dev) seq_printf(m, " %4d:%d", MAJOR(dev), MINOR(dev));