lockdep: Mark emergency sections in lockdep splats

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Mark emergency sections wherever multiple lines of
lock debugging output are generated. In an emergency
section, every printk() call will attempt to directly
flush to the consoles using the EMERGENCY priority.

Note that debug_show_all_locks() and
lockdep_print_held_locks() rely on their callers to
enter the emergency section. This is because these
functions can also be called in non-emergency
situations (such as sysrq).

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20240820063001.36405-36-john.ogness@linutronix.de
Signed-off-by: Petr Mladek <pmladek@suse.com>

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John Ogness 2024-08-20 08:36:01 +02:06 • committed by Petr Mladek

parent 8c03273a50

commit 59cd94ef80

1 changed files with 81 additions and 2 deletions

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kernel/locking/lockdep.c

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