Noop watchdog pretimeout governor, only an informational message is added to the kernel log buffer.
Signed-off-by: Vladimir Zapolskiy <[email protected]> --- drivers/watchdog/Kconfig | 26 ++++++++++++++++++++ drivers/watchdog/Makefile | 1 + drivers/watchdog/pretimeout_noop.c | 49 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 76 insertions(+) create mode 100644 drivers/watchdog/pretimeout_noop.c diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig index eeb515c..4940c3b 100644 --- a/drivers/watchdog/Kconfig +++ b/drivers/watchdog/Kconfig @@ -1633,4 +1633,30 @@ config WATCHDOG_PRETIMEOUT_GOV help The option allows to select watchdog pretimeout governors. +if WATCHDOG_PRETIMEOUT_GOV + +choice + prompt "Default Watchdog Pretimeout Governor" + default WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP + help + This option selects a default watchdog pretimeout governor. + The governor takes its action, if a watchdog is capable + to report a pretimeout event. + +config WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP + bool "noop" + select WATCHDOG_PRETIMEOUT_GOV_NOOP + help + Use noop watchdog pretimeout governor by default. + +endchoice + +config WATCHDOG_PRETIMEOUT_GOV_NOOP + tristate "Noop watchdog pretimeout governor" + help + Noop watchdog pretimeout governor, only an informational + message is added to kernel log buffer. + +endif # WATCHDOG_PRETIMEOUT_GOV + endif # WATCHDOG diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile index 6749cac..16a9e32 100644 --- a/drivers/watchdog/Makefile +++ b/drivers/watchdog/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_WATCHDOG_CORE) += watchdog.o watchdog-objs += watchdog_core.o watchdog_dev.o watchdog-$(CONFIG_WATCHDOG_PRETIMEOUT_GOV) += watchdog_pretimeout.o +obj-$(CONFIG_WATCHDOG_PRETIMEOUT_GOV_NOOP) += pretimeout_noop.o # Only one watchdog can succeed. We probe the ISA/PCI/USB based # watchdog-cards first, then the architecture specific watchdog diff --git a/drivers/watchdog/pretimeout_noop.c b/drivers/watchdog/pretimeout_noop.c new file mode 100644 index 0000000..27c3bf9 --- /dev/null +++ b/drivers/watchdog/pretimeout_noop.c @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2015 Mentor Graphics + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/module.h> +#include <linux/watchdog.h> + +#include <watchdog_pretimeout.h> + +/** + * pretimeout_noop - No operation on watchdog pretimeout event + * @wdd - watchdog_device + * + * This function prints a message about pretimeout to kernel log. + */ +static void pretimeout_noop(struct watchdog_device *wdd) +{ + dev_info(wdd->dev, "watchdog pretimeout event\n"); +} + +static struct watchdog_governor watchdog_gov_noop = { + .name = "noop", + .pretimeout = pretimeout_noop, +#ifdef CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP + .is_default = true, +#endif +}; + +static int __init watchdog_gov_noop_register(void) +{ + return watchdog_register_governor(&watchdog_gov_noop); +} + +static void __exit watchdog_gov_noop_unregister(void) +{ + watchdog_unregister_governor(&watchdog_gov_noop); +} +module_init(watchdog_gov_noop_register); +module_exit(watchdog_gov_noop_unregister); + +MODULE_AUTHOR("Vladimir Zapolskiy <[email protected]>"); +MODULE_DESCRIPTION("Noop watchdog pretimeout governor"); +MODULE_LICENSE("GPL"); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
