John Ogness f980bf1586 printk: Consolidate console deferred printing ... [ Upstream commit 696ffaf50e ] Printing to consoles can be deferred for several reasons: - explicitly with printk_deferred() - printk() in NMI context - recursive printk() calls The current implementation is not consistent. For printk_deferred(), irq work is scheduled twice. For NMI und recursive, panic CPU suppression and caller delays are not properly enforced. Correct these inconsistencies by consolidating the deferred printing code so that vprintk_deferred() is the top-level function for deferred printing and vprintk_emit() will perform whichever irq_work queueing is appropriate. Also add kerneldoc for wake_up_klogd() and defer_console_output() to clarify their differences and appropriate usage. Signed-off-by: John Ogness <john.ogness@linutronix.de> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20230717194607.145135-6-john.ogness@linutronix.de Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-09-23 11:09:59 +02:00
..
braille.c	printk: Replace strncmp() with str_has_prefix()	2019-08-16 09:54:08 +02:00
braille.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
console_cmdline.h	printk: Fix preferred console selection with multiple matches	2020-02-18 09:34:42 +01:00
index.c	kernel/printk/index.c: fix memory leak with using debugfs_lookup()	2023-03-11 13:57:32 +01:00
internal.h	Merge branch 'rework/printk_safe-removal' into for-linus	2021-08-30 16:36:10 +02:00
Makefile	printk: Userspace format indexing support	2021-07-19 11:57:48 +02:00
printk_ringbuffer.c	printk: ringbuffer: Fix truncating buffer size min_t cast	2023-09-19 12:22:50 +02:00
printk_ringbuffer.h	printk: rectify kernel-doc for prb_rec_init_wr()	2021-01-26 11:17:51 +01:00
printk_safe.c	printk: Consolidate console deferred printing	2023-09-23 11:09:59 +02:00
printk.c	printk: Consolidate console deferred printing	2023-09-23 11:09:59 +02:00