/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _TIMEKEEPING_INTERNAL_H #define _TIMEKEEPING_INTERNAL_H /* * timekeeping debug functions */ #include <linux/clocksource.h> #include <linux/time.h> #ifdef [31mCONFIG_DEBUG_FS[0m extern void tk_debug_account_sleep_time(const struct timespec64 *t); #else #define tk_debug_account_sleep_time(x) #endif #ifdef [31mCONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE[0m static inline u64 clocksource_delta(u64 now, u64 last, u64 mask) { u64 ret = (now - last) & mask; /* * Prevent time going backwards by checking the MSB of mask in * the result. If set, return 0. */ return ret & ~(mask >> 1) ? 0 : ret; } #else static inline u64 clocksource_delta(u64 now, u64 last, u64 mask) { return (now - last) & mask; } #endif #endif /* _TIMEKEEPING_INTERNAL_H */ |