| 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 2 | * |
| 3 | * wrapper/cpu.h |
| 4 | * |
| 5 | * Copyright (C) 2021 Michael Jeanson <mjeanson@efficios.com> |
| 6 | */ |
| 7 | |
| 8 | #ifndef _LTTNG_WRAPPER_CPU_H |
| 9 | #define _LTTNG_WRAPPER_CPU_H |
| 10 | |
| 11 | #include <linux/cpu.h> |
| 12 | #include <lttng/kernel-version.h> |
| 13 | |
| 14 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,13,0)) |
| 15 | |
| 16 | static inline |
| 17 | void lttng_cpus_read_lock(void) |
| 18 | { |
| 19 | cpus_read_lock(); |
| 20 | } |
| 21 | |
| 22 | static inline |
| 23 | void lttng_cpus_read_unlock(void) |
| 24 | { |
| 25 | cpus_read_unlock(); |
| 26 | } |
| 27 | |
| 28 | #else /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,13,0) */ |
| 29 | |
| 30 | static inline |
| 31 | void lttng_cpus_read_lock(void) |
| 32 | { |
| 33 | get_online_cpus(); |
| 34 | } |
| 35 | |
| 36 | static inline |
| 37 | void lttng_cpus_read_unlock(void) |
| 38 | { |
| 39 | put_online_cpus(); |
| 40 | } |
| 41 | |
| 42 | #endif /* LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,13,0) */ |
| 43 | |
| 44 | #endif /* _LTTNG_WRAPPER_CPU_H */ |