diff options
| -rw-r--r-- | kernel/printk/internal.h | 2 | ||||
| -rw-r--r-- | kernel/printk/nbcon.c | 19 |
2 files changed, 21 insertions, 0 deletions
diff --git a/kernel/printk/internal.h b/kernel/printk/internal.h index fe8d84d78f1c..72f229382cfa 100644 --- a/kernel/printk/internal.h +++ b/kernel/printk/internal.h @@ -83,6 +83,7 @@ u64 nbcon_seq_read(struct console *con); void nbcon_seq_force(struct console *con, u64 seq); bool nbcon_alloc(struct console *con); void nbcon_free(struct console *con); +enum nbcon_prio nbcon_get_default_prio(void); /* * Check if the given console is currently capable and allowed to print @@ -136,6 +137,7 @@ static inline u64 nbcon_seq_read(struct console *con) { return 0; } static inline void nbcon_seq_force(struct console *con, u64 seq) { } static inline bool nbcon_alloc(struct console *con) { return false; } static inline void nbcon_free(struct console *con) { } +static inline enum nbcon_prio nbcon_get_default_prio(void) { return NBCON_PRIO_NONE; } static inline bool console_is_usable(struct console *con, short flags) { return false; } diff --git a/kernel/printk/nbcon.c b/kernel/printk/nbcon.c index e8ddcb6f7053..c6a9aa9f62f6 100644 --- a/kernel/printk/nbcon.c +++ b/kernel/printk/nbcon.c @@ -974,6 +974,25 @@ update_con: } /** + * nbcon_get_default_prio - The appropriate nbcon priority to use for nbcon + * printing on the current CPU + * + * Context: Any context. + * Return: The nbcon_prio to use for acquiring an nbcon console in this + * context for printing. + * + * The function is safe for reading per-CPU data in any context because + * preemption is disabled if the current CPU is in the panic state. + */ +enum nbcon_prio nbcon_get_default_prio(void) +{ + if (this_cpu_in_panic()) + return NBCON_PRIO_PANIC; + + return NBCON_PRIO_NORMAL; +} + +/** * nbcon_alloc - Allocate and init the nbcon console specific data * @con: Console to initialize * |