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Add support for suspending and resuming the whole console subsystem

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Trying to suspend/resume with console messages flying all around is
doomed to failure, when the devices that the messages are trying to
go to are being shut down.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Linus Torvalds 2006-06-19 18:16:01 -07:00
parent 5603509137
commit 557240b48e
3 changed files with 33 additions and 1 deletions
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4
include/linux/console.h
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@ -117,6 +117,10 @@ extern void console_stop(struct console *);
extern void console_start(struct console *);
extern int is_console_locked(void);
/* Suspend and resume console messages over PM events */
extern void suspend_console(void);
extern void resume_console(void);
/* Some debug stub to catch some of the obvious races in the VT code */
#if 1
#define WARN_CONSOLE_UNLOCKED() WARN_ON(!is_console_locked() && !oops_in_progress)