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printk: For @suppress_panic_printk check for other CPU in panic

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[ Upstream commit 0ab7cdd00491b532591ef065be706301de7e448f ]

Currently @suppress_panic_printk is checked along with
non-matching @panic_cpu and current CPU. This works
because @suppress_panic_printk is only set when
panic_in_progress() is true.

Rather than relying on the @suppress_panic_printk semantics,
use the concise helper function other_cpu_in_progress(). The
helper function exists to avoid open coding such tests.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20240207134103.1357162-7-john.ogness@linutronix.de
Signed-off-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
John Ogness 2024-02-07 14:46:55 +01:06 committed by Greg Kroah-Hartman
parent dbd3c05d71
commit a2e14cc2da
1 changed files with 1 additions and 2 deletions
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3
kernel/printk/printk.c
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@ -2309,8 +2309,7 @@ asmlinkage int vprintk_emit(int facility, int level,
if (unlikely(suppress_printk))
return 0;
if (unlikely(suppress_panic_printk) &&
atomic_read(&panic_cpu) != raw_smp_processor_id())
if (unlikely(suppress_panic_printk) && other_cpu_in_panic())
return 0;
if (level == LOGLEVEL_SCHED) {