Add a global flag @have_nbcon_console to identify if any nbcon
consoles are registered. This will be used in follow-up commits
to preserve legacy behavior when no nbcon consoles are registered.
Signed-off-by: John Ogness <john.ogness@linutronix.de>
---
kernel/printk/printk.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index 4ff3800e8e8e..329b8507f8a0 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -470,6 +470,11 @@ static DEFINE_MUTEX(syslog_lock);
*/
static bool have_legacy_console;
+/*
+ * Specifies if an nbcon console is registered.
+ */
+static bool have_nbcon_console;
+
/*
* Specifies if a boot console is registered. If boot consoles are present,
* nbcon consoles cannot print simultaneously and must be synchronized by
@@ -3533,6 +3538,7 @@ void register_console(struct console *newcon)
console_init_seq(newcon, bootcon_registered);
if (newcon->flags & CON_NBCON) {
+ have_nbcon_console = true;
nbcon_init(newcon);
/*
@@ -3619,6 +3625,7 @@ EXPORT_SYMBOL(register_console);
static int unregister_console_locked(struct console *console)
{
bool found_legacy_con = false;
+ bool found_nbcon_con = false;
bool found_boot_con = false;
struct console *c;
int res;
@@ -3675,13 +3682,18 @@ static int unregister_console_locked(struct console *console)
for_each_console(c) {
if (c->flags & CON_BOOT)
found_boot_con = true;
- if (!(c->flags & CON_NBCON))
+
+ if (c->flags & CON_NBCON)
+ found_nbcon_con = true;
+ else
found_legacy_con = true;
}
if (!found_boot_con)
have_boot_console = found_boot_con;
if (!found_legacy_con)
have_legacy_console = found_legacy_con;
+ if (!found_nbcon_con)
+ have_nbcon_console = found_nbcon_con;
return res;
}
--
2.39.2