diff options
| author | John Ogness <john.ogness@linutronix.de> | 2021-07-15 22:33:56 +0300 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2021-07-26 16:09:34 +0300 |
| commit | 93d102f094be9beab28e5afb656c188b16a3793b (patch) | |
| tree | bc1a38f9ecdabf5e262e433633c68ec6568032ef /include | |
| parent | 002eb6ad075142e5940122c7fcee71cf1e906e29 (diff) | |
| download | linux-93d102f094be9beab28e5afb656c188b16a3793b.tar.xz | |
printk: remove safe buffers
With @logbuf_lock removed, the high level printk functions for
storing messages are lockless. Messages can be stored from any
context, so there is no need for the NMI and safe buffers anymore.
Remove the NMI and safe buffers.
Although the safe buffers are removed, the NMI and safe context
tracking is still in place. In these contexts, store the message
immediately but still use irq_work to defer the console printing.
Since printk recursion tracking is in place, safe context tracking
for most of printk is not needed. Remove it. Only safe context
tracking relating to the console and console_owner locks is left
in place. This is because the console and console_owner locks are
needed for the actual printing.
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/20210715193359.25946-4-john.ogness@linutronix.de
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/printk.h | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/include/linux/printk.h b/include/linux/printk.h index d796183f26c9..719d919f9b67 100644 --- a/include/linux/printk.h +++ b/include/linux/printk.h @@ -208,8 +208,6 @@ void dump_stack_print_info(const char *log_lvl); void show_regs_print_info(const char *log_lvl); extern asmlinkage void dump_stack_lvl(const char *log_lvl) __cold; extern asmlinkage void dump_stack(void) __cold; -extern void printk_safe_flush(void); -extern void printk_safe_flush_on_panic(void); #else static inline __printf(1, 0) int vprintk(const char *s, va_list args) @@ -277,14 +275,6 @@ static inline void dump_stack_lvl(const char *log_lvl) static inline void dump_stack(void) { } - -static inline void printk_safe_flush(void) -{ -} - -static inline void printk_safe_flush_on_panic(void) -{ -} #endif #ifdef CONFIG_SMP |