diff options
Diffstat (limited to 'kernel/printk/internal.h')
| -rw-r--r-- | kernel/printk/internal.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/kernel/printk/internal.h b/kernel/printk/internal.h index c365d25b13c7..3fcb48502adb 100644 --- a/kernel/printk/internal.h +++ b/kernel/printk/internal.h @@ -21,6 +21,19 @@ int devkmsg_sysctl_set_loglvl(const struct ctl_table *table, int write, (con->flags & CON_BOOT) ? "boot" : "", \ con->name, con->index, ##__VA_ARGS__) +/* + * Identify if legacy printing is forced in a dedicated kthread. If + * true, all printing via console lock occurs within a dedicated + * legacy printer thread. The only exception is on panic, after the + * nbcon consoles have had their chance to print the panic messages + * first. + */ +#ifdef CONFIG_PREEMPT_RT +# define force_legacy_kthread() (true) +#else +# define force_legacy_kthread() (false) +#endif + #ifdef CONFIG_PRINTK #ifdef CONFIG_PRINTK_CALLER @@ -173,6 +186,7 @@ static inline void nbcon_kthread_wake(struct console *con) #define printk_safe_exit_irqrestore(flags) local_irq_restore(flags) static inline bool printk_percpu_data_ready(void) { return false; } +static inline void defer_console_output(void) { } static inline bool is_printk_legacy_deferred(void) { return false; } static inline u64 nbcon_seq_read(struct console *con) { return 0; } static inline void nbcon_seq_force(struct console *con, u64 seq) { } @@ -200,7 +214,7 @@ extern bool legacy_allow_panic_sync; * @nbcon_atomic: Flush directly using nbcon_atomic() callback * @nbcon_offload: Offload flush to printer thread * @legacy_direct: Call the legacy loop in this context - * @legacy_offload: Offload the legacy loop into IRQ + * @legacy_offload: Offload the legacy loop into IRQ or legacy thread * * Note that the legacy loop also flushes the nbcon consoles. */ |