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printk: add console_suspend module parameter

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We are enabling some power features on medfield.  To test suspend-2-RAM
conveniently, we need turn on/off console_suspend_enabled frequently.

Add a module parameter, so users could change it by:
/sys/module/printk/parameters/console_suspend

Signed-off-by: Yanmin Zhang <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Yanmin Zhang 2011-10-31 17:11:27 -07:00 • committed by Linus Torvalds
commit 134620f7a8
2 changed files with 9 additions and 0 deletions
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4
kernel/printk.c
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@ -1111,6 +1111,10 @@ static int __init console_suspend_disable(char *str)
return 1;
}
__setup("no_console_suspend", console_suspend_disable);
module_param_named(console_suspend, console_suspend_enabled,
bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(console_suspend, "suspend console during suspend"
" and hibernate operations");
/**
* suspend_console - suspend the console subsystem