#ifndef __WATCHDOG_PRETIMEOUT_H #define __WATCHDOG_PRETIMEOUT_H #define WATCHDOG_GOV_NAME_MAXLEN 20 struct watchdog_device; struct watchdog_governor { const char name[WATCHDOG_GOV_NAME_MAXLEN]; void (*pretimeout)(struct watchdog_device *wdd); }; #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV) /* Interfaces to watchdog pretimeout governors */ int watchdog_register_governor(struct watchdog_governor *gov); void watchdog_unregister_governor(struct watchdog_governor *gov); /* Interfaces to watchdog_dev.c */ int watchdog_register_pretimeout(struct watchdog_device *wdd); void watchdog_unregister_pretimeout(struct watchdog_device *wdd); int watchdog_pretimeout_available_governors_get(char *buf); int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf); int watchdog_pretimeout_governor_set(struct watchdog_device *wdd, const char *buf); #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP) #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "noop" #elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC) #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "panic" #endif #else static inline int watchdog_register_pretimeout(struct watchdog_device *wdd) { return 0; } static inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd) { } static inline int watchdog_pretimeout_available_governors_get(char *buf) { return -EINVAL; } static inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf) { return -EINVAL; } static inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd, const char *buf) { return -EINVAL; } #endif #endif /linux/net-next.git/log/sound/oss/kahlua.c'>logtreecommitdiff
path: root/sound/oss/kahlua.c
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2017-01-31 09:37:34 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 21:47:58 +0100
commit0becc0ae5b42828785b589f686725ff5bc3b9b25 (patch)
treebe6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101 /sound/oss/kahlua.c
parent24c2503255d35c269b67162c397a1a1c1e02f6ce (diff)
x86/mce: Make timer handling more robust
Erik reported that on a preproduction hardware a CMCI storm triggers the BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is started by the CMCI logic before the MCE CPU hotplug callback starts the timer with add_timer_on(). So the timer is already queued which triggers the BUG. Using add_timer_on() is pretty pointless in this code because the timer is strictlty per CPU, initialized as pinned and all operations which arm the timer happen on the CPU to which the timer belongs. Simplify the whole machinery by using mod_timer() instead of add_timer_on() which avoids the problem because mod_timer() can handle already queued timers. Use __start_timer() everywhere so the earliest armed expiry time is preserved. Reported-by: Erik Veijola <erik.veijola@intel.com> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'sound/oss/kahlua.c')