summaryrefslogtreecommitdiffstats
path: root/debian/patches-rt/0015-printk-Let-console_is_usable-handle-nbcon.patch
diff options
context:
space:
mode:
Diffstat (limited to 'debian/patches-rt/0015-printk-Let-console_is_usable-handle-nbcon.patch')
-rw-r--r--debian/patches-rt/0015-printk-Let-console_is_usable-handle-nbcon.patch43
1 files changed, 43 insertions, 0 deletions
diff --git a/debian/patches-rt/0015-printk-Let-console_is_usable-handle-nbcon.patch b/debian/patches-rt/0015-printk-Let-console_is_usable-handle-nbcon.patch
new file mode 100644
index 0000000000..0172326b0c
--- /dev/null
+++ b/debian/patches-rt/0015-printk-Let-console_is_usable-handle-nbcon.patch
@@ -0,0 +1,43 @@
+From: John Ogness <john.ogness@linutronix.de>
+Date: Tue, 12 Sep 2023 13:53:21 +0000
+Subject: [PATCH 15/46] printk: Let console_is_usable() handle nbcon
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.9/older/patches-6.9-rt5.tar.xz
+
+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@linutronix.de>
+Reviewed-by: Petr Mladek <pmladek@suse.com>
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ kernel/printk/internal.h | 11 +++++++++--
+ 1 file changed, 9 insertions(+), 2 deletions(-)
+
+--- 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(str
+ 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