From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- kernel/printk/internal.h | 74 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 kernel/printk/internal.h (limited to 'kernel/printk/internal.h') diff --git a/kernel/printk/internal.h b/kernel/printk/internal.h new file mode 100644 index 000000000..3a8fd4917 --- /dev/null +++ b/kernel/printk/internal.h @@ -0,0 +1,74 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * internal.h - printk internal definitions + */ +#include + +#ifdef CONFIG_PRINTK + +#define PRINTK_SAFE_CONTEXT_MASK 0x007ffffff +#define PRINTK_NMI_DIRECT_CONTEXT_MASK 0x008000000 +#define PRINTK_NMI_CONTEXT_MASK 0xff0000000 + +#define PRINTK_NMI_CONTEXT_OFFSET 0x010000000 + +extern raw_spinlock_t logbuf_lock; + +__printf(4, 0) +int vprintk_store(int facility, int level, + const struct dev_printk_info *dev_info, + const char *fmt, va_list args); + +__printf(1, 0) int vprintk_default(const char *fmt, va_list args); +__printf(1, 0) int vprintk_deferred(const char *fmt, va_list args); +__printf(1, 0) int vprintk_func(const char *fmt, va_list args); +void __printk_safe_enter(void); +void __printk_safe_exit(void); + +void printk_safe_init(void); +bool printk_percpu_data_ready(void); + +#define printk_safe_enter_irqsave(flags) \ + do { \ + local_irq_save(flags); \ + __printk_safe_enter(); \ + } while (0) + +#define printk_safe_exit_irqrestore(flags) \ + do { \ + __printk_safe_exit(); \ + local_irq_restore(flags); \ + } while (0) + +#define printk_safe_enter_irq() \ + do { \ + local_irq_disable(); \ + __printk_safe_enter(); \ + } while (0) + +#define printk_safe_exit_irq() \ + do { \ + __printk_safe_exit(); \ + local_irq_enable(); \ + } while (0) + +void defer_console_output(void); + +#else + +__printf(1, 0) int vprintk_func(const char *fmt, va_list args) { return 0; } + +/* + * In !PRINTK builds we still export logbuf_lock spin_lock, console_sem + * semaphore and some of console functions (console_unlock()/etc.), so + * printk-safe must preserve the existing local IRQ guarantees. + */ +#define printk_safe_enter_irqsave(flags) local_irq_save(flags) +#define printk_safe_exit_irqrestore(flags) local_irq_restore(flags) + +#define printk_safe_enter_irq() local_irq_disable() +#define printk_safe_exit_irq() local_irq_enable() + +static inline void printk_safe_init(void) { } +static inline bool printk_percpu_data_ready(void) { return false; } +#endif /* CONFIG_PRINTK */ -- cgit v1.2.3