printk: console_flush_on_panic: use srcu console list iterator

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With SRCU it is now safe to traverse the console list, even if
the console_trylock() failed. However, overwriting console->seq
when console_trylock() failed is still an issue.

Switch to SRCU iteration and document remaining issue with
console->seq.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20221116162152.193147-20-john.ogness@linutronix.de

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John Ogness 2022-11-16 17:27:31 +01:06 • committed by Petr Mladek

parent d792db6f6b

commit 87f2e4b7d9

1 changed files with 11 additions and 10 deletions

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kernel/printk/printk.c

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