Commit 132a90d1 authored by John Ogness's avatar John Ogness Committed by Petr Mladek
Browse files

printk: Rename abandon_console_lock_in_panic() to other_cpu_in_panic() 



Currently abandon_console_lock_in_panic() is only used to determine if
the current CPU should immediately release the console lock because
another CPU is in panic. However, later this function will be used by
the CPU to immediately release other resources in this situation.

Rename the function to other_cpu_in_panic(), which is a better
description and does not assume it is related to the console lock.

Signed-off-by: default avatarJohn Ogness <john.ogness@linutronix.de>
Reviewed-by: default avatarSergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: default avatarPetr Mladek <pmladek@suse.com>
Signed-off-by: default avatarPetr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20230717194607.145135-8-john.ogness@linutronix.de
parent 9e70a5e1

kernel/printk/internal.h

+2 −0
Original line number Diff line number Diff line
@@ -103,3 +103,5 @@ struct printk_message { 
	u64			seq;

	unsigned long		dropped;

};



bool other_cpu_in_panic(void);

kernel/printk/printk.c

+8 −7
Original line number Diff line number Diff line
@@ -2612,11 +2612,12 @@ static int console_cpu_notify(unsigned int cpu) 
}



/*

 * Return true when this CPU should unlock console_sem without pushing all

 * messages to the console. This reduces the chance that the console is

 * locked when the panic CPU tries to use it.

 * Return true if a panic is in progress on a remote CPU.

 *

 * On true, the local CPU should immediately release any printing resources

 * that may be needed by the panic CPU.

 */

static bool abandon_console_lock_in_panic(void)

bool other_cpu_in_panic(void)

{

	if (!panic_in_progress())

		return false;
@@ -2643,7 +2644,7 @@ void console_lock(void) 
	might_sleep();



	/* On panic, the console_lock must be left to the panic cpu. */

	while (abandon_console_lock_in_panic())

	while (other_cpu_in_panic())

		msleep(1000);



	down_console_sem();
@@ -2663,7 +2664,7 @@ EXPORT_SYMBOL(console_lock); 
int console_trylock(void)

{

	/* On panic, the console_lock must be left to the panic cpu. */

	if (abandon_console_lock_in_panic())

	if (other_cpu_in_panic())

		return 0;

	if (down_trylock_console_sem())

		return 0;
@@ -2978,7 +2979,7 @@ static bool console_flush_all(bool do_cond_resched, u64 *next_seq, bool *handove 
			any_progress = true;



			/* Allow panic_cpu to take over the consoles safely. */

			if (abandon_console_lock_in_panic())

			if (other_cpu_in_panic())

				goto abandon;



			if (do_cond_resched)