diff options
| author | John Ogness <john.ogness@linutronix.de> | 2022-11-16 17:27:29 +0106 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2022-12-02 11:25:00 +0100 |
| commit | 12f1da5fc4c728dc690a2fe3f4197d62f3a6fa7b (patch) | |
| tree | 3648bb752a3f2fb696821f9e1225ed8c1347996e /kernel/printk | |
| parent | eb7f1ed2509c6223d960a7d69644a8eb506b13d0 (diff) | |
| download | linux-12f1da5fc4c728dc690a2fe3f4197d62f3a6fa7b.tar.gz | |
printk: console_is_usable: use console_srcu_read_flags
All users of console_is_usable() are SRCU iterators. Use the
appropriate wrapper function to locklessly read the flags.
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/20221116162152.193147-18-john.ogness@linutronix.de
Diffstat (limited to 'kernel/printk')
| -rw-r--r-- | kernel/printk/printk.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index abdbd3ffb0684..853a86c94ee08 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -2709,11 +2709,13 @@ static bool abandon_console_lock_in_panic(void) * Check if the given console is currently capable and allowed to print * records. * - * Requires the console_lock. + * Requires the console_srcu_read_lock. */ static inline bool console_is_usable(struct console *con) { - if (!(con->flags & CON_ENABLED)) + short flags = console_srcu_read_flags(con); + + if (!(flags & CON_ENABLED)) return false; if (!con->write) @@ -2724,8 +2726,7 @@ static inline bool console_is_usable(struct console *con) * allocated. So unless they're explicitly marked as being able to * cope (CON_ANYTIME) don't call them until this CPU is officially up. */ - if (!cpu_online(raw_smp_processor_id()) && - !(con->flags & CON_ANYTIME)) + if (!cpu_online(raw_smp_processor_id()) && !(flags & CON_ANYTIME)) return false; return true; |