diff options
Diffstat (limited to 'arch/arm/include/asm/pmu.h')
| -rw-r--r-- | arch/arm/include/asm/pmu.h | 29 |
1 files changed, 10 insertions, 19 deletions
diff --git a/arch/arm/include/asm/pmu.h b/arch/arm/include/asm/pmu.h index b7e82c4aced6..a06ba8773cd7 100644 --- a/arch/arm/include/asm/pmu.h +++ b/arch/arm/include/asm/pmu.h @@ -14,6 +14,10 @@ #include <linux/interrupt.h> +/* + * Types of PMUs that can be accessed directly and require mutual + * exclusion between profiling tools. + */ enum arm_pmu_type { ARM_PMU_DEVICE_CPU = 0, ARM_NUM_PMU_DEVICES, @@ -37,21 +41,17 @@ struct arm_pmu_platdata { * reserve_pmu() - reserve the hardware performance counters * * Reserve the hardware performance counters in the system for exclusive use. - * The platform_device for the system is returned on success, ERR_PTR() - * encoded error on failure. + * Returns 0 on success or -EBUSY if the lock is already held. */ -extern struct platform_device * +extern int reserve_pmu(enum arm_pmu_type type); /** * release_pmu() - Relinquish control of the performance counters * * Release the performance counters and allow someone else to use them. - * Callers must have disabled the counters and released IRQs before calling - * this. The platform_device returned from reserve_pmu() must be passed as - * a cookie. */ -extern int +extern void release_pmu(enum arm_pmu_type type); /** @@ -68,23 +68,14 @@ init_pmu(enum arm_pmu_type type); #include <linux/err.h> -static inline struct platform_device * -reserve_pmu(enum arm_pmu_type type) -{ - return ERR_PTR(-ENODEV); -} - static inline int -release_pmu(enum arm_pmu_type type) +reserve_pmu(enum arm_pmu_type type) { return -ENODEV; } -static inline int -init_pmu(enum arm_pmu_type type) -{ - return -ENODEV; -} +static inline void +release_pmu(enum arm_pmu_type type) { } #endif /* CONFIG_CPU_HAS_PMU */ |