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printk fixup for 6.6-rc6

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Merge tag 'printk-for-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

Pull printk regression fix from Petr Mladek:

 - Avoid unnecessary wait and try to flush messages before checking
   pending ones

* tag 'printk-for-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
  printk: flush consoles before checking progress
This commit is contained in:
Linus Torvalds 2023-10-11 13:15:16 -07:00
commit 4524565e3a
1 changed files with 7 additions and 1 deletions
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8
kernel/printk/printk.c
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@ -3740,12 +3740,18 @@ static bool __pr_flush(struct console *con, int timeout_ms, bool reset_on_progre
seq = prb_next_seq(prb);
/* Flush the consoles so that records up to @seq are printed. */
console_lock();
console_unlock();
for (;;) {
diff = 0;
/*
* Hold the console_lock to guarantee safe access to
* console->seq.
* console->seq. Releasing console_lock flushes more
* records in case @seq is still not printed on all
* usable consoles.
*/
console_lock();