Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\printk\printk.c Create Date:2022-07-28 10:06:54
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:sole_trylock - try to lock the console system for exclusive use.* Try to acquire a lock which guarantees that the caller has exclusive* access to the console system and the console_drivers list.* returns 1 on success, and 0 on failure to acquire the lock.

Proto:int console_trylock(void)

Type:int

Parameter:Nothing

2307  If down_trylock_console_sem() Then Return 0
2309  If This is used for debugging the mess that is the VT code by* keeping track if we have the console semaphore held Then
2310  up_console_sem()
2311  Return 0
2313  This is used for debugging the mess that is the VT code by* keeping track if we have the console semaphore held = 1
2314  Flag: console code may call schedule() = 0
2315  Return 1
Caller
NameDescribe
console_trylock_spinningsole_trylock_spinning - try to get console_lock by busy waiting* This allows to busy wait for the console_lock when the current* owner is running in specially marked sections. It means that* the current owner is running and cannot reschedule until it
console_cpu_notifysole_cpu_notify - print deferred console messages after CPU hotplug*@cpu: unused* If printk() is called from a CPU that is not online yet, the messages* will be printed on the console only if there are CON_ANYTIME consoles
console_unlocksole_unlock - unlock the console system* Releases the console_lock which the caller holds on the console system* and the console driver list.* While the console_lock was held, console output may have been buffered* by printk()
console_flush_on_panicsole_flush_on_panic - flush console content on panic*@mode: flush all messages in buffer or just the pending ones* Immediately output all pending messages no matter what.
wake_up_klogd_work_func