diff options
| author | John Ogness <john.ogness@linutronix.de> | 2023-07-17 21:52:06 +0206 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2023-07-20 13:06:22 +0200 |
| commit | 9e70a5e109a4a23367810de09be826c52d27ee2f (patch) | |
| tree | ba589f9ff3687ef952bc5a4c300f1d6af2b65a05 /include/linux/console.h | |
| parent | 696ffaf50e1f8dbc66223ff614473f945f5fb8d8 (diff) | |
printk: Add per-console suspended state
Currently the global @console_suspended is used to determine if
consoles are in a suspended state. Its primary purpose is to allow
usage of the console_lock when suspended without causing console
printing. It is synchronized by the console_lock.
Rather than relying on the console_lock to determine suspended
state, make it an official per-console state that is set within
console->flags. This allows the state to be queried via SRCU.
Remove @console_suspended. Console printing will still be avoided
when suspended because console_is_usable() returns false when
the new suspended flag is set for that console.
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/20230717194607.145135-7-john.ogness@linutronix.de
Diffstat (limited to 'include/linux/console.h')
| -rw-r--r-- | include/linux/console.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/console.h b/include/linux/console.h index d3195664baa5..7de11c763eb3 100644 --- a/include/linux/console.h +++ b/include/linux/console.h @@ -154,6 +154,8 @@ static inline int con_debug_leave(void) * receiving the printk spam for obvious reasons. * @CON_EXTENDED: The console supports the extended output format of * /dev/kmesg which requires a larger output buffer. + * @CON_SUSPENDED: Indicates if a console is suspended. If true, the + * printing callbacks must not be called. */ enum cons_flags { CON_PRINTBUFFER = BIT(0), @@ -163,6 +165,7 @@ enum cons_flags { CON_ANYTIME = BIT(4), CON_BRL = BIT(5), CON_EXTENDED = BIT(6), + CON_SUSPENDED = BIT(7), }; /** |