| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _LINUX_TRACE_CLOCK_H |
| #define _LINUX_TRACE_CLOCK_H |
| |
| /* |
| * 3 trace clock variants, with differing scalability/precision |
| * tradeoffs: |
| * |
| * - local: CPU-local trace clock |
| * - medium: scalable global clock with some jitter |
| * - global: globally monotonic, serialized clock |
| */ |
| #include <linux/compiler.h> |
| #include <linux/types.h> |
| |
| #include <asm/trace_clock.h> |
| |
| extern u64 notrace trace_clock_local(void); |
| extern u64 notrace trace_clock(void); |
| extern u64 notrace trace_clock_jiffies(void); |
| extern u64 notrace trace_clock_global(void); |
| extern u64 notrace trace_clock_counter(void); |
| |
| #endif /* _LINUX_TRACE_CLOCK_H */ |