linux-next/kernel/time/timekeeping_internal.h

#ifndef _TIMEKEEPING_INTERNAL_H
#define _TIMEKEEPING_INTERNAL_H
/*
 * timekeeping debug functions
 */
#include <linux/time.h>

#ifdef CONFIG_DEBUG_FS
extern void tk_debug_account_sleep_time(struct timespec *t);
#else
#define tk_debug_account_sleep_time(x)
#endif

#endif /* _TIMEKEEPING_INTERNAL_H */
power: Add option to log time spent in suspend Below is a patch from android kernel that maintains a histogram of suspend times. Please review and provide feedback. Statistices on the time spent in suspend are kept in /sys/kernel/debug/sleep_time. Cc: Android Kernel Team <kernel-team@android.com> Cc: Colin Cross <ccross@android.com> Cc: Todd Poynor <toddpoynor@google.com> Cc: San Mehat <san@google.com> Cc: Benoit Goby <benoit@android.com> Cc: John Stultz <john.stultz@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: Todd Poynor <toddpoynor@google.com> [zoran.markovic@linaro.org: Re-formatted suspend time table to better fit expected values. Moved accounting of suspend time into timekeeping core. Removed CONFIG_SUSPEND_TIME flag and made the feature conditional on CONFIG_DEBUG_FS. Changed the file name to sleep_time to better fit terminology in timekeeping core. Changed seq_printf to seq_puts. Tweaked commit message] Signed-off-by: Zoran Markovic <zoran.markovic@linaro.org> Signed-off-by: John Stultz <john.stultz@linaro.org> 2013-05-22 13:32:14 +08:00			`#ifndef _TIMEKEEPING_INTERNAL_H`
			`#define _TIMEKEEPING_INTERNAL_H`
			`/*`
			`* timekeeping debug functions`
			`*/`
			`#include <linux/time.h>`

			`#ifdef CONFIG_DEBUG_FS`
			`extern void tk_debug_account_sleep_time(struct timespec *t);`
			`#else`
			`#define tk_debug_account_sleep_time(x)`
			`#endif`

			`#endif /* _TIMEKEEPING_INTERNAL_H */`