[ANNOUNCE] 5.10.168-rt83

[Luis Claudio R. Goncalves]

Hello RT-list!

I'm pleased to announce the 5.10.168-rt83 stable release.

You can get this release via the git tree at:

  git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git

  branch: v5.10-rt
  Head SHA1: d9e23cb3164dffbb59cd995fb652d99cb8e3bc56

Or to build 5.10.168-rt83 directly, the following patches should be applied:

  https://www.kernel.org/pub/linux/kernel/v5.x/linux-5.10.tar.xz

  https://www.kernel.org/pub/linux/kernel/v5.x/patch-5.10.168.xz

  https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patch-5.10.168-rt83.patch.xz

Signing key fingerprint:

  9354 0649 9972 8D31 D464  D140 F394 A423 F8E6 7C26

All keys used for the above files and repositories can be found on the
following git repository:

   git://git.kernel.org/pub/scm/docs/kernel/pgpkeys.git

Enjoy!
Luis

RT Changes since v5.10.165-rt81:
---

John Ogness (1):
      printk: ignore consoles without write() callback
---
 kernel/printk/printk.c                             |    6 +
 1 file changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index d2205872304d..64747c72fbea 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -2267,6 +2267,10 @@ static int printk_kthread_func(void *data)
 /* Must be called within console_lock(). */
 static void start_printk_kthread(struct console *con)
 {
+	/* No need to start a printing thread if the console cannot print. */
+	if (!con->write)
+		return;
+
 	con->thread = kthread_run(printk_kthread_func, con,
 				  "pr/%s%d", con->name, con->index);
 	if (IS_ERR(con->thread)) {
@@ -3566,6 +3570,8 @@ bool pr_flush(int timeout_ms, bool reset_on_progress)
 		for_each_console(con) {
 			if (!(con->flags & CON_ENABLED))
 				continue;
+			if (!con->write && !con->write_atomic)
+				continue;
 			printk_seq = atomic64_read(&con->printk_seq);
 			if (printk_seq < seq)
 				diff += seq - printk_seq;