[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20240502213839.376636-17-john.ogness@linutronix.de>
Date: Thu, 2 May 2024 23:44:25 +0206
From: John Ogness <john.ogness@...utronix.de>
To: Petr Mladek <pmladek@...e.com>
Cc: Sergey Senozhatsky <senozhatsky@...omium.org>,
Steven Rostedt <rostedt@...dmis.org>,
Thomas Gleixner <tglx@...utronix.de>,
linux-kernel@...r.kernel.org
Subject: [PATCH printk v5 16/30] printk: Let console_is_usable() handle nbcon
The nbcon consoles use a different printing callback. For nbcon
consoles, check for the write_atomic() callback instead of
write().
Signed-off-by: John Ogness <john.ogness@...utronix.de>
Reviewed-by: Petr Mladek <pmladek@...e.com>
---
kernel/printk/internal.h | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/kernel/printk/internal.h b/kernel/printk/internal.h
index 339563dd60bb..943e8f083609 100644
--- a/kernel/printk/internal.h
+++ b/kernel/printk/internal.h
@@ -87,6 +87,8 @@ void nbcon_free(struct console *con);
/*
* Check if the given console is currently capable and allowed to print
+ * records. Note that this function does not consider the current context,
+ * which can also play a role in deciding if @con can be used to print
* records.
*
* Requires the console_srcu_read_lock.
@@ -101,8 +103,13 @@ static inline bool console_is_usable(struct console *con)
if ((flags & CON_SUSPENDED))
return false;
- if (!con->write)
- return false;
+ if (flags & CON_NBCON) {
+ if (!con->write_atomic)
+ return false;
+ } else {
+ if (!con->write)
+ return false;
+ }
/*
* Console drivers may assume that per-cpu resources have been
--
2.39.2
Powered by blists - more mailing lists